At this years ICMC Conference, [ICMC 2012](http://www.icmc2012.si/) we presented a paper describing a way to experiment with tone scales and how to use Tarsos as a compositional tool. What follows are some pointers to the presentation, paper and to other interesting talks that were presented there.
ICMC 2012 was organized in Ljubljana from the 9 to 14 septembre and had a very dense program of talks, posters, presentations, demos and concerts.
Since 1974 the International Computer Music Conference has been the major international forum for the presentation of the full range of outcomes from technical and musical research, both musical and theoretical, related to the use of computers in music. This annual conference regularly travels the globe, with recent conferences in the Americas, Europe and Asia. This year we welcome the conference to Slovenia for the first time.### Sound to Scale to Sound, a Setup for Microtonal Exploration and Composition Our contribution to the conference was a paper titled "Sound to Scale to Sound, a Setup for Microtonal Exploration and Composition":\[icmc2012_submission_45.pdf\]. If you want to cite our work, this BibTeX entry is included for your convenience: \`\`\`ruby\ \@inproceedings{cornelis2012sound_to_scale,\ author = {Olmo Cornelis and Joren Six},\ title = {{Sound to Scale to Sound, a Setup for Microtonal Exploration and Composition}},\ booktitle = {{Proceedings of the 2012 International Computer Music Conference,\ (ICMC 2012)}},\ year = {2012},\ publisher = {The International Computer Music Association}\ }\ \`\`\` ### Program highlights What follows are a number of pointers to my personal program highlights. Verena Thomas presented two very well polished software tools. One to detect patterns in scores, called motifviewer and a tool to search in score databases in a multi-modal way. The [Probado tool](http://probado.iai.uni-bonn.de:8080/) does score-to-audio alignment and much more. [Gibber](http://www.charlie-roberts.com/gibber/) is an impressive live-coding environment with an easy syntax. Since it is all done with javascript you can start playing with it immediately. [Overtone](http://overtone.github.com/) Another live-coding environment, presented at the conference by Sam Aaron, was equally impressive. It is programmed using the Closure language. At ICMC there were a number of tools to assist in composition. One of those is [The Bach Project](http://www.bachproject.net/bach/home_page.html), by Andrea Agostini. Togheter with CatART by Diemo Swartz it forms a very expressive platform to work with sound, which was demonstrated by Aaron Einbond and Christopher Trapani in their paper titled *Precise Pitch Control In Real Time Corpus-Based Concatenative Synthesis*. Diemo Swartz presented work on Audio Mosaicing, it can be seen as a follow-up to [AuidioGuild](http://crca.ucsd.edu/~ben/audioGuide/) by Ben Hackbarth. I also got to know the work by [Thomas Grill](http://grrrr.org), on his website a nice piece of software can be found a Python implementation of the [Non Stationary Gabor Transform (NSGT)](http://grrrr.org/research/software/nsgt/). Another software system I got to know is the functional signal processing programming language [FAUST](http://en.wikipedia.org/wiki/FAUST_(programming_language)) My personal highlights of the concert programme include the works by Johannes Kreidler, Aura Pon, Daniel Mayer, Alexander Schubert and the remarkable performance by Dexter Ford. The concept behind Soundlog by Johannes Kretz was also interesting. - [ICMC\_Logo.png](https://0110.be/files/attachments/369/ICMC_Logo.png) - [2012.09.08-Sound\_to\_Scale\_to\_Sound\_\_a\_Setup\_for\_Microtonal\_Exploration\_and\_Composition.odp](https://0110.be/files/attachments/369/2012.09.08-Sound_to_Scale_to_Sound__a_Setup_for_Microtonal_Exploration_and_Composition.odp) - [icmc2012\_submission\_45.pdf](https://0110.be/files/attachments/369/icmc2012_submission_45.pdf) --- ## [CIM 2012 - Revealing and Listening to Scales From the Past; Tone Scale Analysis of Archived Central-African Music Using Computational Means](https://0110.be/posts/CIM_2012_-_Revealing_and_Listening_to_Scales_From_the_Past%3B_Tone_Scale_Analysis_of_Archived_Central-African_Music_Using_Computational_Means.md) - Published: 2012-08-31T00:00:00Z - Updated: 2014-02-13T10:58:38Z - Author: Joren - ID: 351 - Canonical: https://0110.be/posts/CIM_2012_-_Revealing_and_Listening_to_Scales_From_the_Past%3B_Tone_Scale_Analysis_of_Archived_Central-African_Music_Using_Computational_Means - Tags: [Computational musicology](https://0110.be/tags/Computational%20musicology.md), [HoGent](https://0110.be/tags/HoGent.md), [Music Information Retrieval](https://0110.be/tags/Music%20Information%20Retrieval.md), [Presentation](https://0110.be/tags/Presentation.md), [Research papers](https://0110.be/tags/Research%20papers.md), [Tarsos](https://0110.be/tags/Tarsos.md), [featured](https://0110.be/tags/featured.md)
What follows is about the [Conference on Interdisciplinary Musicology (CIM2012)](http://gfm2012.uni-goettingen.de/cim12/CIM12/Home.html) and the [15th international Conference of the Gesellschaft fur Musikfoschung](http://gfm2012.uni-goettingen.de/GfM2012/Home.html). First this text will give information about our contribution to CIM2012: *Revealing and Listening to Scales From the Past; Tone Scale Analysis of Archived Central-African Music Using Computational Means* and then a number of highlights of the conference follow. The joint conference took place from the 4th to the 8th of september 2012.
In 2012, CIM will tackle the subject of History. Hosted by the University of Göttingen, whose one time music director Johann Nikolaus Forkel is widely regarded as one of the founders of modern music historiography, CIM12 aims to promote collaborations that provoke and explore new methods and methodologies for establishing, evaluating, preserving and communicating knowledge of music and musical practices of past societies and the factors implicated in both the preservation and transformation of such practices over time.### Revealing and Listening to Scales From the Past; Tone Scale Analysis of Archived Central-African Music Using Computational Means Our contribution ton CIM 2012 is titled "Revealing and Listening to Scales From the Past; Tone Scale Analysis of Archived Central-African Music Using Computational Means":\[CIM12_Submission.pdf\]. The aim was to show how tone scales of the past, e.g. organ tuning, can be extracted and sonified. During the demo special attention was given to historic Central African tuning systems. The presentation I gave is included below and or available for "download":\[2012.09.05-Revealing_and_listening_to_scales_from_the_past\_\_tone_scale_analysis_of_archived_Central-African_music_using_computational_means..ppt\] ### Highlights What follows are some personal highlights for the [Conference on Interdisciplinary Musicology (CIM2012)](http://gfm2012.uni-goettingen.de/cim12/CIM12/Home.html) and the [15th international Conference of the Gesellschaft fur Musikfoschung](http://gfm2012.uni-goettingen.de/GfM2012/Home.html). The joint conference took place from the 4th to the 8th of september 2012. The work presented by Rytis Ambrazevicius et al. *Modal changes in traditional Lithuanian singing: Diachronic aspect* has a lot in common with our research, it was interesting to see their approach. Another highlight of the conference was the whole session organized by Klaus-Peter Brenner around Mbira music. Rainer Polak gave a talk titled *'Swing, Groove and Metre. Asymmetric Feels, Metric Ambiguity and Metric Transformation in African Musics'*. He showed how research about rhythm in jazz research, music theory and empirical musicology ( amongst others) could be bridged and applied to ethnic music. The overview Eleanore Selfridge-Field gave during her talk *Between an Analogue Past and a Digital Future: The Evolving Digital Present* was refreshing. She had a really clear view on all the different ways musicology and digital media can benifit from each-other. From the concert programme I found two especially interesting: the lecture-performance by Margarete Maierhofer-Lischka and Frauke Aulbert of [*Lotofagos*](http://www.youtube.com/watch?v=tYD30v0PgoI), a piece by Beat Furrer and *Burdocks* composed and performed by Christian Wolff and a bunch of enthusiastic students. - [Forkeljpg.jpg](https://0110.be/files/attachments/351/Forkeljpg.jpg) - [CIM12\_Submission.pdf](https://0110.be/files/attachments/351/CIM12_Submission.pdf) - [2012.09.05-Revealing\_and\_listening\_to\_scales\_from\_the\_past\_\_tone\_scale\_analysis\_of\_archived\_Central-African\_music\_using\_computational\_means..ppt](https://0110.be/files/attachments/351/2012.09.05-Revealing_and_listening_to_scales_from_the_past__tone_scale_analysis_of_archived_Central-African_music_using_computational_means..ppt) --- ## [Analytical Approaches To World Music - Microtonal Scale Exploration in Central Africa](https://0110.be/posts/Analytical_Approaches_To_World_Music_-_Microtonal_Scale_Exploration_in_Central_Africa.md) - Published: 2012-06-06T06:54:04Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 342 - Canonical: https://0110.be/posts/Analytical_Approaches_To_World_Music_-_Microtonal_Scale_Exploration_in_Central_Africa - Tags: [Computational ethnomusicology](https://0110.be/tags/Computational%20ethnomusicology.md), [Computational musicology](https://0110.be/tags/Computational%20musicology.md), [HoGent](https://0110.be/tags/HoGent.md), [Presentation](https://0110.be/tags/Presentation.md), [Tarsos](https://0110.be/tags/Tarsos.md), [featured](https://0110.be/tags/featured.md) At the 2012 [AAWM (Analytical Approaches To World Music)](http://www.aawmconference.com/aawm2012/papers.htm) conference we presented a way to explore tone scales in the music of Central Africa. Since the audience consisted of (ethno)musicologists, the main focus of the presentation was on the applicication part, the technical aspects were only briefly mentioned. The extended abstract can be consulted: [Towards the tangible: microtonal scale exploration in Central-African music](http://www.aawmconference.com/aawm2012/papers/cornelis_p.pdf) The conference program itself was very diverse and interesting. - [2012.05.11-Towards\_the\_Tangible\_-\_Microtonal\_Scale\_Exploration\_in\_Central-African\_Music.odp](https://0110.be/files/attachments/342/2012.05.11-Towards_the_Tangible_-_Microtonal_Scale_Exploration_in_Central-African_Music.odp) - [AAWM\_abstract\_short.doc](https://0110.be/files/attachments/342/AAWM_abstract_short.doc) --- ## [TarsosDSP Release 1.2](https://0110.be/posts/TarsosDSP_Release_1.2.md) - Published: 2012-06-05T13:26:22Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 336 - Canonical: https://0110.be/posts/TarsosDSP_Release_1.2 - Tags: [HoGent](https://0110.be/tags/HoGent.md), [TarsosDSP](https://0110.be/tags/TarsosDSP.md) Today a new version of the TarsosDSP library was released. TarsosDSP is a small library to do audio processing in Java. It features two new pitch detectors. An AMDF (Average Magnitude Difference Function) pitch detector, contributed by [Eder Souza](http://ederwander.wordpress.com/) of Brazil and a faster implementation of YIN kindly provided by [Matthias Mauch](http://matthiasmauch.net/) of Queen Mary University, London.
TarsosDSP is a collection of classes to do simple audio processing. It features an implementation of a percussion onset detector and two pitch detection algorithms: Yin and the Mcleod Pitch method. Also included is a Goertzel DTMF decoding algorithm and a time stretch algorithm (WSOLA).
Its aim is to provide a simple interface to some audio (signal) processing algorithms implemented in pure JAVA. Some TarsosDSP example applications are available.
The following example filters a band of frequencies of an input file testFile. It keeps the frequencies form startFrequency to stopFrequency.
AudioInputStream inputStream = AudioSystem.getAudioInputStream(testFile);
AudioDispatcher dispatcher = new AudioDispatcher(inputStream,stepSize,overlap);
dispatcher.addAudioProcessor(new HighPass(startFrequency, sampleRate, overlap));
dispatcher.addAudioProcessor(new LowPassFS(stopFrequency, sampleRate, overlap));
dispatcher.addAudioProcessor(new FloatConverter(format));
dispatcher.addAudioProcessor(new WaveformWriter(format,stepSize, overlap, "filtered.wav"));
dispatcher.run();
Head over to the TarsosDSP release repository and download the latest TarsosDSP library. To get up to speed quickly, check the TarsosDSP Example applications for inspiration and consult the API documentation. If you, for some reason, want to build from source, you need Apache Ant and git installed on your system. The following commands fetch the source and build the library and example jars:
git clone https://JorenSix@github.com/JorenSix/TarsosDSP.git
cd TarsosDSP/build
ant tarsos_dsp_library #Builds the core TarsosDSP library
ant build_examples #Builds all the TarsosDSP examples
ant javadoc #Creates the documentation in TarsosDSP/doc
\
When everything runs correctly you should be able to run all example applications and have the latest version of the TarsosDSP library for inclusion in your projects. Also the Javadoc documentation for the API should be available in TarsosDSP/doc. Drop me a line if you use TarsosDSP in your project. Always nice to hear how this software is used.
The source tree is divided in three directories:
src contains the source files of the core DSP libraries.
test contains unit tests for some of the DSP functionality.
build contains ANT build files. Either to build Java documentation or runnable JAR-files for the example applications.
examples contains a couple of example applications with a Java Swing user interface:
The 29th of February 2012 there was a symposium on Music Information Retreival in Utrecht. It was organized on the occasion of Bas de Haas' PhD defense. The title of the study day was [Harmony and variation in music information retrieval](http://research.cs.uu.nl/index.php/events/symposium-harmony-variation-in-mir).
During the talk by Xavier Serra rasikas.org was mentioned a forum with [discussions about Carnatic Music](http://rasikas.org). Since I could find a couple of discussions about pitch use on that forum I [plugged Tarsos](http://www.rasikas.org/forum/viewtopic.php?f=9&t=18763) there to see if I could gather some feedback.
---
## [Echo or Delay Audio Effect in Java With TarsosDSP](https://0110.be/posts/Echo_or_Delay_Audio_Effect_in_Java_With_TarsosDSP.md)
- Published: 2012-02-23T15:33:11Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 398
- Canonical: https://0110.be/posts/Echo_or_Delay_Audio_Effect_in_Java_With_TarsosDSP
- Tags: [Code](https://0110.be/tags/Code.md), [HoGent](https://0110.be/tags/HoGent.md), [Java](https://0110.be/tags/Java.md), [TarsosDSP](https://0110.be/tags/TarsosDSP.md)
The DSP library for Taros, aptly named TarsosDSP, now includes an implementation of an audio echo effect. An echo effect is very simple to implement digitally and can serve as a good example of a DSP operation.
\
java -jar Spectrogram.jar in.wav\
The source code of the Java implementation can be found on the [TarsosDSP github page](https://github.com/JorenSix/TarsosDSP/).
- [Spectrogram.jar](https://0110.be/files/attachments/384/Spectrogram.jar)
- [spectrogram.png](https://0110.be/files/attachments/384/spectrogram.png)
---
## [Démonstration de Tarsos](https://0110.be/posts/D%C3%A9monstration_de_Tarsos.md)
- Published: 2012-02-10T12:58:38Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 376
- Canonical: https://0110.be/posts/D%C3%A9monstration_de_Tarsos
- Tags: [Computational musicology](https://0110.be/tags/Computational%20musicology.md), [HoGent](https://0110.be/tags/HoGent.md), [Tarsos](https://0110.be/tags/Tarsos.md), [français](https://0110.be/tags/fran%C3%A7ais.md)
Nous avons creé une video pour expliquer des possibilités de Tarsos, et maintenant en français.
\
java -jar TimeStretch.jar in.wav out.wav 2.0\
_______ _____ _____ _____
|__ __| | __ \ / ____| __ \
| | __ _ _ __ ___ ___ ___| | | | (___ | |__) |
| |/ _` | '__/ __|/ _ \/ __| | | |\___ \| ___/
| | (_| | | \__ \ (_) \__ \ |__| |____) | |
|_|\__,_|_| |___/\___/|___/_____/|_____/|_|
----------------------------------------------------
Name:
TarsosDSP Time stretch utility.
----------------------------------------------------
Synopsis:
java -jar TimeStretch.jar source.wav target.wav factor
----------------------------------------------------
Description:
Change the play back speed of audio without changing the pitch.
source.wav A readable, mono wav file.
target.wav Target location for the time stretched file.
factor Time stretching factor: 2.0 means double the length, 0.5 half. 1.0 is no change.
The source code of the Java implementation of WSOLA can be found on the [TarsosDSP github page](https://github.com/JorenSix/TarsosDSP/blob/master/src/be/hogent/tarsos/dsp/filters/WaveformSimilarityBasedOverlapAdd.java).
- [time\_stretching\_in\_java.png](https://0110.be/files/attachments/372/time_stretching_in_java.png)
- [08.\_Ladrang\_Kandamanyura\_10s-20s.wav](https://0110.be/files/attachments/372/08._Ladrang_Kandamanyura_10s-20s.wav)
- [TimeStretch.jar](https://0110.be/files/attachments/372/TimeStretch.jar)
---
## [Tarsos CLI: Detect Pitch](https://0110.be/posts/Tarsos_CLI%3A__Detect_Pitch.md)
- Published: 2012-02-03T15:00:06Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 390
- Canonical: https://0110.be/posts/Tarsos_CLI%3A__Detect_Pitch
- Tags: [Code](https://0110.be/tags/Code.md), [Command Line Application](https://0110.be/tags/Command%20Line%20Application.md), [HoGent](https://0110.be/tags/HoGent.md), [Java](https://0110.be/tags/Java.md), [Music Information Retrieval](https://0110.be/tags/Music%20Information%20Retrieval.md), [Tarsos](https://0110.be/tags/Tarsos.md)
Tarsos contains a couple of useful command line applications. They can be used to execute common tasks on lots of files. [Dowload Tarsos](http://tarsos.0110.be/attachment/tarsos.jar) and call the applications using the following format:
`java -jar tarsos.jar command [argument...] [--option [value]...]`
The first part `java -jar tarsos.jar` tells the Java Runtime to start the correct application. The first argument for Tarsos defines the command line application to execute. Depending on the command, required arguments and options can follow.
`java -jar tarsos.jar detect_pitch in.wav --detector TARSOS_YIN`
To get a list of available commands, type `java -jar tarsos.jar -h`. If you want more information about a command type `java -jar tarsos.jar command -h`
## Detect Pitch
Detects pitch for one or more input audio files using a pitch detector. If a directory is given it traverses the directory *recursively*. It writes CSV data to standard out with five columns. The first is the start of the analyzed window (seconds), the second the estimated pitch, the third the saillence of the pitch. The name of the algorithm follows and the last column shows the original filename.
Synopsis
--------
java -jar tarsos.jar detect_pitch [option] input_file...
Option Description
------ -----------
-?, -h, --help Show help
--detector 
This document describes how pitch can be represented using various units. More specifically it documents how a software program to analyse pitch in music, Tarsos, represents pitch. This document contains definitions of and remarks on different pitch and pitch interval representations. For good measure we need a definition of pitch, here the definition from \[McLeod 2009\] is used: *The pitch frequency is the frequency of a pure sine wave which has the same perceived sound as the sound of interest.* For remarks and examples of cases where the pitch frequency does not coincide with the fundamental frequency of the signal, also see \[McLeod 2009\] . In this text pitch, pitch interval and pitch ratio are briefly discussed.- [pitch\_representation.pdf](https://0110.be/files/attachments/354/pitch_representation.pdf) --- ## [TarsosDSP sample application: Utter Asterisk](https://0110.be/posts/TarsosDSP_sample_application%3A_Utter_Asterisk.md) - Published: 2011-12-15T14:30:42Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 404 - Canonical: https://0110.be/posts/TarsosDSP_sample_application%3A_Utter_Asterisk - Tags: [HoGent](https://0110.be/tags/HoGent.md), [TarsosDSP](https://0110.be/tags/TarsosDSP.md)
The DSP library of Tarsos, aptly named TarsosDSP, contains an implementation of a game that bares some resemblance to SingStar. It is called UtterAsterisk. It is meant to be a technical demonstration showing real-time pitch detection in pure java using a [YIN](http://recherche.ircam.fr/equipes/pcm/cheveign/ps/2002_JASA_YIN_proof.pdf) -implementation.
"Download Utter Asterisk":\[UtterAsterisk.jar\] and try to sing (utter) as close to the melody as possible. The [souce code for Utter Asterisk](https://github.com/JorenSix/TarsosDSP) is available on github.
- [UtterAsterisk.jar](https://0110.be/files/attachments/404/UtterAsterisk.jar)
---
## [TarsosDSP used in jAM - Java Automatic Music Transcription](https://0110.be/posts/TarsosDSP_used_in_jAM_-_Java_Automatic_Music_Transcription.md)
- Published: 2011-12-12T09:13:14Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 399
- Canonical: https://0110.be/posts/TarsosDSP_used_in_jAM_-_Java_Automatic_Music_Transcription
- Tags: [HoGent](https://0110.be/tags/HoGent.md), [Java](https://0110.be/tags/Java.md), [TarsosDSP](https://0110.be/tags/TarsosDSP.md)
TarsosDSP, a small Java DSP library, has been used in a bachelor thesis: [Entwicklung eines Systems zur automatischen Notentranskription von monophonischem Audiomaterial](http://saeft.com/jAM/assets/Bachelorarbeit.pdf) by Michael Wager.
The goal of the thesis was to develop an automatic transcription system for monophonic music. You can download the latest version of [jAM - Java Automatic Music Transcription](http://saeft.com/jAM/index.php/index/download).
If you want to use TarsosDSP, please consult the [TarsosDSP page on github](https://github.com/JorenSix/TarsosDSP) or read [more about TarsosDSP](https://0110.be/tag/TarsosDSP) here.
---
## [Kinderuniversiteit - Muziek onder de microscoop!](https://0110.be/posts/Kinderuniversiteit_-_Muziek_onder_de_microscoop%21.md)
- Published: 2011-12-12T08:41:21Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 326
- Canonical: https://0110.be/posts/Kinderuniversiteit_-_Muziek_onder_de_microscoop%21
- Tags: [Dutch](https://0110.be/tags/Dutch.md), [HoGent](https://0110.be/tags/HoGent.md), [Java](https://0110.be/tags/Java.md), [Presentation](https://0110.be/tags/Presentation.md)
Zondag 18 december 2011 gaf ik een workshop voor de [Gentse kinderuniversiteit](http://kinderuniversiteit.be). Het thema van de kinderuniversiteit was [Muziek onder de microscoop](http://www.kinderuniversiteit.be/event/muziek-onder-de-microscoop). De teaser voor de workshop is hier te vinden:
Concreet worden enkele componenten van geluid (en bij uitbreiding, muziek) gedemonstreerd met computerprogrammaatjes gemaakt in het conservatorium: - "Geluidssterkte":\[SoundDetector.jar\]: een decibel-meter met een bepaalde drempelwaarde. Probeer zo luid mogelijk te doen en zie hoe moeilijk het is om, eens een bepaald niveau bereikt is, in decibel te stijgen. - "Toonhoogte":\[UtterAsterisk.jar\]: een klein spelletje om toonhoogte aan te tonen. Probeer zo juist mogelijk te zingen of te fluiten en vergelijk je score. - "Percussie":\[PercussionDetector.jar\]: dit programma reageert op handgeklap. Hoe kan je het onderscheid maken tussen bijvoorbeeld een fluittoon en handgeklap? De foto's hieronder geven een sfeerbeeld.       - [logo-with-arrow.png](https://0110.be/files/attachments/326/logo-with-arrow.png) - [UtterAsterisk.jar](https://0110.be/files/attachments/326/UtterAsterisk.jar) - [PercussionDetector.jar](https://0110.be/files/attachments/326/PercussionDetector.jar) - [PitchDetector.jar](https://0110.be/files/attachments/326/PitchDetector.jar) - [SoundDetector.jar](https://0110.be/files/attachments/326/SoundDetector.jar) --- ## [How To: Generate an Audio Fingerprinting Data Set With Sox Audio Effects](https://0110.be/posts/How_To%3A_Generate_an_Audio_Fingerprinting_Data_Set_With_Sox_Audio_Effects.md) - Published: 2011-12-07T09:42:13Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 391 - Canonical: https://0110.be/posts/How_To%3A_Generate_an_Audio_Fingerprinting_Data_Set_With_Sox_Audio_Effects - Tags: [Code](https://0110.be/tags/Code.md), [HoGent](https://0110.be/tags/HoGent.md) A small part of Tarsos has been turned into a [audio fingerprinting application](https://0110.be/artikels/lees/Robust_Audio_Fingerprinting_with_Tarsos_and_Pitch_Class_Histograms). The idea of audio fingerprinting is to create a condensed representation of an audio file. A perceptually similar audio file should generate similar fingerprints. To test how robust a fingerprinting technique is, a data set with audio files that are alike in some way is practical. [SoX - Sound eXchange](http://sox.sourceforge.net/) is a command line utility for sound processing. It can apply audio effects to a sound. Using these effects and a set of unmodified songs an audio fingerprinting data set can be created. To generate such a data set SoX can be used to: - Trim the first x seconds of a file - Speed-up or slow-down the audio - Change the pitch of a file without modifying the tempo - Generate background noise (white noise is used) - Reverse the audio stream \`\`\`ruby\ #Trim the first 10 seconds\ sox input.wav output.wav trim 10 #speed-up of 10%\ sox input.wav output.wav speed 1.10 #change the pitch upwards 100 cents (one semitone)\ #without changing the tempo\ sox input.wav output.wav pitch 100 #generate white noise with the length of input.wav\ sox input.wav noise.wav synth whitenoise\ #mix the white noise with the input to generate noisy output\ #-v defines how loud the white noise is\ sox -m input.wav -v 0.1 noise.wav output.wav #reverse the audio\ sox input.wav output.wav reverse\ \`\`\` A ruby script to generate a lot of these files can be found "attached":\[audio_fingerprinting_dataset_generator.rb.txt\]. - [audio\_fingerprinting\_dataset\_generator.rb.txt](https://0110.be/files/attachments/391/audio_fingerprinting_dataset_generator.rb.txt) --- ## [The Power of the Pentatonic Scale](https://0110.be/posts/The_Power_of_the_Pentatonic_Scale.md) - Published: 2011-12-06T14:05:56Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 387 - Canonical: https://0110.be/posts/The_Power_of_the_Pentatonic_Scale - Tags: [Computational musicology](https://0110.be/tags/Computational%20musicology.md), [HoGent](https://0110.be/tags/HoGent.md), [Tarsos](https://0110.be/tags/Tarsos.md), [featured](https://0110.be/tags/featured.md) The following video shows Bobby McFerrin demonstrating the power of the pentatonic scale. It is a fascinating demonstration of how quickly a (western) audience of the World Science Festival 2009 adapts to an unusual tone scale: With Tarsos the scale used in the example can be found. This is the result of a quick analysis: it becomes clear that this, in fact, a pentatonic scale with an unequal octave division. A perfect fifth is present between 255 and 753 cents:WORKSHOP - Muziek (ont)luisteren op de computer\ Is het mogelijk om piano te spelen op een tafel? Kan een computer luisteren naar muziek en er van genieten? Wat is muziek eigenlijk, en hoe werkt geluid?
\ Tijdens deze workshop worden de voorgaande vragen beantwoord met enkele computerprogramma's!
The 17th of Octobre 2011 Tarsos was presented at the [Study Day: Tuning and Temperament](http://music.sas.ac.uk/imr-events/imr-conferences-colloquia-performance-events/study-day-tuning-and-temperament.html) which was held at the Institue of Music Research in Londen. The study day was organised by Dan Tidhar. A short description of the aim of the study day:
This is an interdisciplinary study day, bringing together musicologists, harpsichord specialists, and digital music specialists, with the aim of exploring the different angles these fields provide on the subject, and how these can be fruitfully interconnected. We offer an optional introduction to temperament for non specialists, to equip all potential listeners with the basic concepts and terminology used throughout the day.--- ## [Tarsos presentation at 'ISMIR 2011'](https://0110.be/posts/Tarsos_presentation_at_%27ISMIR_2011%27.md) - Published: 2011-10-25T21:55:27Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 368 - Canonical: https://0110.be/posts/Tarsos_presentation_at_%27ISMIR_2011%27 - Tags: [Computational ethnomusicology](https://0110.be/tags/Computational%20ethnomusicology.md), [HoGent](https://0110.be/tags/HoGent.md), [ISMIR](https://0110.be/tags/ISMIR.md), [Music Information Retrieval](https://0110.be/tags/Music%20Information%20Retrieval.md), [Presentation](https://0110.be/tags/Presentation.md), [Research papers](https://0110.be/tags/Research%20papers.md), [Tarsos](https://0110.be/tags/Tarsos.md)
Olmo Cornelis and myself just gave a presentation about Tarsos at the at the [12th International Society for Music Information Retrieval Conference](http://ismir2011.ismir.net/) which is held at Miami.
The live demo we gave went well and we got a lot of positive, interesting feedback. The [presentation about Tarsos](https://0110.be/25.10.2011.ismir_tarsos.pdf) is available here.
It was the first time in the history of ISMIR that there was a session with oral [presentations about Non-Western Music](http://ismir2011.ismir.net/program.html#OS2). We were pleased to be part of this.
The peer reviewed paper about our work: [Tarsos - a Platform to Explore Pitch Scales in Non-Western and Western Music](http://ismir2011.ismir.net/program.html#OS2) is available from the ISMIR website and embedded below:
- [2011.10.25.ismir\_tarsos.pdf](https://0110.be/files/attachments/368/2011.10.25.ismir_tarsos.pdf)
---
## [Tarsos at 'WASPAA 2011'](https://0110.be/posts/Tarsos_at_%27WASPAA_2011%27.md)
- Published: 2011-10-18T13:59:12Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 367
- Canonical: https://0110.be/posts/Tarsos_at_%27WASPAA_2011%27
- Tags: [HoGent](https://0110.be/tags/HoGent.md), [Presentation](https://0110.be/tags/Presentation.md), [Tarsos](https://0110.be/tags/Tarsos.md), [featured](https://0110.be/tags/featured.md)
During the the demo session of the [IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)](http://waspaa.com) a demonstration of Tarsos was given. During the demo, [the 18th of Octobre 2011](http://www.waspaa.com/waspaa11/information-for-attendees/schedule/index.html#DM) feedback was gathered.
During the conference I met interesting people and their work:
Carnatic Music Analysis: Shadja, Swara Identification and Raga Verification in Alapana using Stochastic Models\
Ranjani HG, Arthi S, Sreenivas TV
Simulation of the Violin Section Sound based on the analysis of orchestra performance\
Jukka Pätynen, Sakari Tervo, Tapio Lokki
Another interesting paper is [Informed Source Separation: Source Coding Meets Source Separation](http://hal.inria.fr/docs/00/61/05/26/PDF/Ozerov_et_al_WASPAA11_v6.pdf). A demo of this can be found [here](http://www.irisa.fr/metiss/ozerov/ciss_demo.html).
---
## [Bruikbare software voor muziekanalyse](https://0110.be/posts/Bruikbare_software_voor_muziekanalyse.md)
- Published: 2011-10-04T09:48:55Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 360
- Canonical: https://0110.be/posts/Bruikbare_software_voor_muziekanalyse
- Tags: [Dutch](https://0110.be/tags/Dutch.md), [HoGent](https://0110.be/tags/HoGent.md), [Presentation](https://0110.be/tags/Presentation.md)
Op dinsdag vier oktober 2011 werd een les gegeven over bruikbare software voor muziekanalyse. Het doel was om duidelijk te maken welk type onderzoeksvragen van bachelor/masterproeven baat kunnen hebben bij objectieve metingen met software voor klankanalyse. Ook de manier waarop werd besproken: soorten digitale representaties van muziek met voorbeelden van softwaretoepassingen werden behandeld.
* [Sonic Visualizer](http://www.sonicvisualiser.org): As its name suggests Sonic Visualizer contains a lot different visualisations for audio. It can be used for analysis (pitch,beat,chroma,...) with [VAMP-plugins](http://vamp-plugins.org). To quote *"The aim of Sonic Visualiser is to be the first program you reach for when want to study a musical recording rather than simply listen to it"*. It is the swiss army knife of audio analysis. * [BeatRoot](http://www.eecs.qmul.ac.uk/~simond/beatroot/) is designed specifically for one goal: beat tracking. It can be used for e.g. comparing tempi of different performances of the same piece or to track tempo deviation within one piece. * [Tartini](http://tartini.net) is capable to do real-time pitch analysis of sound. You can e.g. play into a microphone with a violin and see the harmonics you produce and adapt you playing style based on visual feedback. It also contains a pitch deviation measuring apparatus to analyse vibrato. * [Tarsos](http://tarsos.0110.be) is software for tone scale analysis. It is useful to extract tone scales from audio. Different tuning systems can be seen, extracted and compared. It also contains the ability to play along with the original song with a tuned midi keyboard . * [music21](http://mit.edu/music21/) from their website: "music21 is a set of tools for helping scholars and other active listeners answer questions about music quickly and simply. If you've ever asked yourself a question like, "I wonder how often Bach does that" or "I wish I knew which band was the first to use these chords in this order," or "I'll bet we'd know more about Renaissance counterpoint (or Indian ragas or post-tonal pitch structures or the form of minuets) if I could write a program to automatically write more of them," then music21 can help you with your work."Om aan te duiden welke digitale representaties welke informatie bevatten werd een stuk van Franz Liszt in verschillende formaten gebruikt: - "Partituur (PDF)":\[00.partituur.liebestraum_3.pdf\] - "MusicXML":\[01.musicXML-liebestraum_no_3.xml\] - "MIDI als partituur":\[01.deadpan_midi.wav\] - "MIDI als uitvoering":\[02.performed_midi.wav\] - "Acoustische uitvoering":\[03.human.performance.wav\]   - [01.BeatRoot.tempo.wav](https://0110.be/files/attachments/360/01.BeatRoot.tempo.wav) - [beatroot-0.5.8-rc1.jar](https://0110.be/files/attachments/360/beatroot-0.5.8-rc1.jar) - [03.human.performance.wav](https://0110.be/files/attachments/360/03.human.performance.wav) - [02.performed\_midi.wav](https://0110.be/files/attachments/360/02.performed_midi.wav) - [01.deadpan\_midi.wav](https://0110.be/files/attachments/360/01.deadpan_midi.wav) - [01.musicXML-liebestraum\_no\_3.xml](https://0110.be/files/attachments/360/01.musicXML-liebestraum_no_3.xml) - [00.partituur.liebestraum\_3.pdf](https://0110.be/files/attachments/360/00.partituur.liebestraum_3.pdf) - [2011.10.04.bruikbare\_software\_voor\_muziekanalyse.ppt](https://0110.be/files/attachments/360/2011.10.04.bruikbare_software_voor_muziekanalyse.ppt) - [2011.10.04.bruikbare\_software\_voor\_muziekanalyse.odp](https://0110.be/files/attachments/360/2011.10.04.bruikbare_software_voor_muziekanalyse.odp) --- ## [Dual-Tone Multi-Frequency (DTMF) Decoding with the Goertzel Algorithm in Java](https://0110.be/posts/Dual-Tone_Multi-Frequency_%28DTMF%29_Decoding_with_the_Goertzel_Algorithm_in_Java.md) - Published: 2011-09-27T09:07:26Z - Updated: 2013-12-05T18:19:15Z - Author: Joren - ID: 343 - Canonical: https://0110.be/posts/Dual-Tone_Multi-Frequency_%28DTMF%29_Decoding_with_the_Goertzel_Algorithm_in_Java - Tags: [Code](https://0110.be/tags/Code.md), [HoGent](https://0110.be/tags/HoGent.md), [Java](https://0110.be/tags/Java.md), [TarsosDSP](https://0110.be/tags/TarsosDSP.md)
The DSP library of Tarsos, aptly named TarsosDSP, now contains an implementation of the Goertzel Algorithm. It is implemented using pure Java.
The [Goertzel algorithm](http://en.wikipedia.org/wiki/Goertzel_algorithm) can be used to detect if one or more predefined frequencies are present in a signal and it does this very efficiently. One of the classic applications of the Goertzel algorithm is decoding the tones generated on by touch tone telephones. These use [DTMF (Dual tone multi frequency)-signaling](http://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling).
To make the algorithm visually appealing a Java Swing interface has been created(visible right). You can try this application by running the "Goertzel DTMF Jar-file":\[GoertzelDTMF.jar\]. The souce code is included in the jar and is avaliable as a separate "zip file":\[GoertzelDTMF_src.zip\]. The [TarsosDSP github page](https://github.com/JorenSix/TarsosDSP) also contains the source for the [Goertzel algorithm Java implementation](https://github.com/JorenSix/TarsosDSP/blob/master/src/be/hogent/tarsos/dsp/pitch/Goertzel.java).
- [goertzel\_DTMF\_java\_7.png](https://0110.be/files/attachments/343/goertzel_DTMF_java_7.png)
- [GoertzelDTMF.jar](https://0110.be/files/attachments/343/GoertzelDTMF.jar)
- [GoertzelDTMF\_src.zip](https://0110.be/files/attachments/343/GoertzelDTMF_src.zip)
---
## [PeachNote Piano at the ISMIR 2011 demo session](https://0110.be/posts/PeachNote_Piano_at_the_ISMIR_2011_demo_session.md)
- Published: 2011-09-26T07:32:02Z
- Updated: 2013-12-05T18:19:15Z
- Author: Joren
- ID: 340
- Canonical: https://0110.be/posts/PeachNote_Piano_at_the_ISMIR_2011_demo_session
- Tags: [Code](https://0110.be/tags/Code.md), [Computational musicology](https://0110.be/tags/Computational%20musicology.md), [HoGent](https://0110.be/tags/HoGent.md), [ISMIR](https://0110.be/tags/ISMIR.md), [Music Information Retrieval](https://0110.be/tags/Music%20Information%20Retrieval.md), [PeachNote Piano](https://0110.be/tags/PeachNote%20Piano.md), [Presentation](https://0110.be/tags/Presentation.md), [Research papers](https://0110.be/tags/Research%20papers.md)
The extended abstract about PeachNote Piano has been accepted as a demonstration presentation to appear at the ISMIR (International Society for Music Information Retrieval) 2011 conference in Miami. To know more about PeachNote Piano come see us at our demo stand (during the [Late Breaking and Demo Session](http://ismir2011.ismir.net/program2011.html#demo)) or read the paper: "Peachnote Piano: Making MIDI instruments social and smart using Arduino, Android and Node.js":\[PeachNote_Piano_ISMIR_Demo.pdf\]. What follows here is the introduction of the extended abstract:
Playing music instruments can bring a lot of joy and satisfaction, but not all apsects of music practice are always enjoyable. In this contribution we are addressing two such sometimes unwelcome aspects: the solitude of practicing and the "dumbness" of instruments. The process of practicing and mastering of music instruments often takes place behind closed doors. A student of piano spends most of her time alone with the piano. Sounds of her playing get lost, and she can't always get feedback from friends, teachers, or, most importantly, random Internet users. Analysing her practicing sessions is also not easy. The technical possibility to record herself and put the recordings online is there, but the needed effort is relatively high, and so one does it only occasionally, if at all. Instruments themselves usually do not exhibit any signs of intelligence. They are practically mechanic devices, even when implemented digitally. Usually they react only to direct actions of a player, and the player is solely responsible for the music coming out of the insturment and its quality. There is no middle ground between passive listening to music recordings and active music making for someone who is alone with an instrument. We have built a prototype of a system that strives to offer a practical solution to the above problems for digital pianos. From ground up, we have built a system which is capable of transmitting MIDI data from a MIDI instrument to a web service and back, exposing it in real-time to the world and optionally enriching it.A previous post [about PeachNote Piano](http://tarsos.0110.be/artikels/lees/PeachNote_Piano) has more technical details together with a video showing the core functionality (quasi-instantaneous USB-BlueTooth-MIDI communication). Some photos can be found below.      - [PeachNote\_Piano\_ISMIR\_Demo.pdf](https://0110.be/files/attachments/340/PeachNote_Piano_ISMIR_Demo.pdf) --- [Newer posts](https://0110.be/index.md?page=4) [Older posts](https://0110.be/index.md?page=6)