~ Tarsos at 'Lectures on Computational Ethnomusicology'

» By Joren on Thursday 24 February 2011

Tarsos Logo This monday the 28th of February Tarsos will be presented at “Lectures on Computational Ethnomusicology” which is held at Izmir, Turkey. The presentation of Tarsos is available here.

Next to the interesting programme it is a great opportunity to meet Baris Bozkurt who has been working on similar research but applied to Makam music.

On wednesday the second of March there is a small seminar at Electrical and Electronics Eng. Dept. of İzmir Yüksek Teknoloji Enstitüsü where Tarsos will be presented also.

Computational ethnomusicology, Presentation, featured, Tarsos, and HoGent Attachments

2011-02-28_tarsos_at_izmir.pdf, programme_lectures_on_comp_ethno_izmir.pdf, and 2011-02-28-tarsos_at_izmir.odp

~ TarsosTranscoder

» By Joren on Wednesday 09 February 2011

Tarsos Transcoder is a library to transcode audio with JAVA.

Downloads and more info on http://tarsos.0110.be/tag/TarsosTranscoder

It uses (platform dependent) FFmpeg binaries in the background. It is a fork of JAVE (Java Audio and Video Encoder) by Carlo Pelliccia (www.sauronsoftware.it).

Tarsos Transcoder focuses only on audio and it is compatible with more, and more recent FFmpeg binaries and it less dependent on text output of the different binaries. The interface is also simplified. It falls back to use the ffmpeg binary in the system path, if one is present, therefore it supports platforms for which no binary is provided within the release.

Getting Started

If you have Apache Ant and git installed on your system the following commands get you started quickly:

git clone https://JorenSix@github.com/JorenSix/TarsosTranscoder.git
cd TarsosTranscoder/build
ant #Compiles and builds the core TarsosTranscoder library
ant javadoc #Creates the javadoc documentation in TarsosTranscoder/doc
java -jar tarsos_transcoder-1.0.jar ../audio/input/tone/tone_10s.wav test.flac FLAC_MONO_44KHZ #Test wav to flac transcoding

If you want to use the transcoder from within Java you need to call Transcoder. It is as simple as:

Transcoder.transcode("foo.mp3","foo.wav",DefaultAttributes.WAV_PCM_S16LE_STEREO_44KHZ);

FFmpeg can encode to a lot of audio formats and can decode even more.

Inner workings

Tarsos Transcoder tries to find an FFmpeg binary in the path of the system. If it does not find one it tries to copy a binary for the current platform. Tarsos Transcoder contains three binaries: one for MAC OS X, one for Linux (x86) and one for windows. Tarsos Transcoder has been tested on:

MAC OS X 10.6
Windows 7
Ubuntu linux 10.10 ARM
Ubuntu Linux 10.04 x86_64

It will probably work most of the time.

Alternative Binaries

If the TarsosTranscoder does not include binaries for you platform, install ffmpeg and add the ffmpeg executable to your system path. It will be found and used by TarsosTranscoder automatically.

Alternatively, providing binaries for your (unsupported) platform can be done by implementing FFMPEGLocator. The PickMe method should yield true on your platform and copy e.g. an FFmpeg binary to a temporary directory.

Lisence

This software is licensed under GPL, TarsosTranscoder is based on JAVE (GPL).

Credits

JAVE (Java Audio and Video Encoder) by Carlo Pelliccia – www.sauronsoftware.it

FFmpeg: this uses libraries from the FFmpeg project under the LGPLv2.1

This product includes software developed by The Apache Software Foundation. It uses the Apache Commons Exec library, licensed under the Apache License Version 2.0

TarsosTranscoder is used by Tarsos, Tarsos is developed at University College Ghent, Faculty of Music

HoGent and TarsosTranscoder

~ ARIP: Artistic Research In Progress

» By Joren on Tuesday 01 February 2011

Voor ARIP heb ik een artikel over Tarsos geschreven. Het motiveert kort de bestaansredenen van Tarsos – een applicatie om toonhoogtegebruik in muziek te analyseren – en het artikel geeft een overzicht van de werking van Tarsos aan de hand van een voorbeeld. Hieronder zijn multimediale aanvullingen te vinden bij het artikel.

Ladrang Kandamanyura (slendro pathet manyura), zo heet het muziekfragment dat gebruikt werd in het artikel als voorbeeld van een stuk muziek met een ongewone (voor onze westerse oren toch) toonladder. De CD waarop het stuk te vinden is, is bij wergo te verkrijgen. Een fragment van 30 seconden is hier te beluisteren:

Het fragment kan je ook downloaden om zelf te analyseren met Tarsos.

Ladrang Kandamanyura (slendro pathet manyura)
Courtesy of: WERGO/Schott Music & Media, Mainz, Germany, www.wergo.de and Museum Collection Berlin
Lestari – The Hood Collection, Early Field Recordings from Java (SM 1712 2)
Recorded in 1957 and 1958 in Java – First release

Tarsos Live

Het onderstaande videofragment geeft aan hoe Tarsos gebruikt kan worden om in real time stemmingen te meten. Geluid afkomstig van een microfoon wordt dan meteen geanalyseerd en onmiddellijke feedback toont een gespeeld of gezongen interval. Het maakt kwarttonen of andere (ongewone) intervallen visueel duidelijk. Tarsos kan zo gebruikt worden door zangers of strijkers die willen experimenteren met microtonaliteit. Ook kan het handig zijn voor etnomusicologisch veldwerk: bijvoorbeeld om kora (een Afrikaanse harp) toonladders te documenteren.