[aubio-user] Phase vocoder: Custom bands

[Paul Brossier]

Hello Thomas,

I believe what you are looking for is in
`python/demos/demo_simple_spectral_weighting.py`.

Another example, in C this time, can be found in `src/pitch/pitchyinfft.c`.

In both cases, the 2 steps are:
 - build a vector of weights for each frequency bins
 - multiply the norm of each phase vocoder grains by this vector

Let us know if this helps!

best, piem

On 11/11/2017 11:09 AM, Thomas Fischer wrote:
> Dear aubio users,
> 
> I would like to create a phase vocoder using using python-aubio as
> demonstrated here:
> https://github.com/aubio/aubio/blob/master/python/demos/demo_simple_robot_voice.py
> 
> However, I would like to be able to model the bands at which the vocoder
> operates.
> Say I want 11 bands, each 25Hz wide, between 100Hz and 2kHz, at a
> constant interval of 190Hz:
> 
> 100Hz
> 290Hz
> 480Hz
> 670Hz
> 860Hz
> 1050Hz
> 1240Hz
> 1430Hz
> 1620Hz
> 1810Hz
> 2000Hz
> 
> Do you have any suggestion as to how this can be done using python-aubio?
> 
> Thank you and kind regards,
> Tom
> 
> 
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