--- title: Constant-Q Transform in Java with TarsosDSP canonical: https://0110.be/posts/Constant-Q_Transform_in_Java_with_TarsosDSP markdown_url: https://0110.be/posts/Constant-Q_Transform_in_Java_with_TarsosDSP.md id: 363 published_at: '2013-10-09T00:00:00Z' updated_at: '2020-11-17T09:01:43Z' author: Joren tags: - name: Code markdown_url: https://0110.be/tags/Code.md - name: Computational musicology markdown_url: https://0110.be/tags/Computational%20musicology.md - name: HoGent markdown_url: https://0110.be/tags/HoGent.md - name: Java markdown_url: https://0110.be/tags/Java.md - name: Music Information Retrieval markdown_url: https://0110.be/tags/Music%20Information%20Retrieval.md - name: TarsosDSP markdown_url: https://0110.be/tags/TarsosDSP.md --- # Constant-Q Transform in Java with TarsosDSP The DSP library for Taros, aptly named TarsosDSP, now includes an implementation of a *Constant-Q Transform* (as of version 1.6). The Constant-Q transform does essentially the same thing as an FFT, but has the advantage that each octave has the same amount of bins. This makes the Constant-Q transform practical for applications processing music. If, for example, 12 bins per octave are chosen, these can correspond with the western musical scale. Also included in the newest release (version 1.7) is a way to visualize the transform, or other musical features. The visualization implementation is done together with Thomas Stubbe. The example application below shows the Constant-Q transform with an overlay of pitch estimations. The corresponding waveform is also shown.

Find your oven fresh baked binaries at the [TarsosDSP Release Repository](http://tarsos.0110.be/releases/TarsosDSP/).\ The source code can be found at the [TarsosDSP GitHub repository](https://github.com/JorenSix/TarsosDSP). - [constantq-visualization-java.png](https://0110.be/files/attachments/363/constantq-visualization-java.png)