[SciPy-Dev] SciPy Contribution: Gammatone Filters in scipy.signal

[Shashaank Narayanan]

 I've been looking into the new code contribution process on the SciPy
website. If someone gives me the green light and is willing to review my
code, I can begin creating the development environment on my machine and
creating unit tests/benchmarks for the new functions. I hope that these
gammatone filters can be included in SciPy, because they have a wide range
of applications from neural auditory science to signal processing, and
there is currently no efficient implementation for Python so far.

- Shashaank

On Thu, Mar 5, 2020 at 3:13 PM Eric Larson <larson.eric.d at gmail.com> wrote:

> Seems like a reasonable addition to me. At first I thought it might be a
> little bit specialized (despite having worked with them a little bit
> myself). However, there are a reasonable number of Google hits in a search,
> and it appears to be a part of the MATLAB "audio" toolbox, suggesting it
> probably does have sufficiently wide-ranging uses to warrant inclusion in
> SciPy.
>
> My 2c,
> Eric
>
>
> On Fri, Feb 28, 2020 at 10:12 AM Todd <toddrjen at gmail.com> wrote:
>
>> I would be extremely interested in having gammatone filters implemented.
>>   I have been wanting it for a long time, but haven't gotten around to
>> doing it myself yet.  But I don't speak for the scipy core developers, they
>> would need to weigh in on this.
>>
>> On Thu, Feb 27, 2020 at 11:16 AM Shashaank Narayanan <
>> shashaank.n at columbia.edu> wrote:
>>
>>> Hi,
>>>
>>> Newbie here. I just wanted to follow up on the Gammatone filters for
>>> signal processing contribution idea that I posted recently. I would also be
>>> interested in contributing to SciPy by doing maintenance/bug fixes for the
>>> scipy.signal module.
>>>
>>>
>>> Thanks,
>>> Shashaank
>>>
>>> On Thu, Jan 30, 2020 at 5:38 PM Shashaank Narayanan <
>>> shashaank.n at columbia.edu> wrote:
>>>
>>>> Hello SciPy Team,
>>>>
>>>> I am new to this mailing list, and I am interested in contributing to
>>>> SciPy. I would like to suggest a new feature to be added to the
>>>> scipy.signal module: gammatone filters. Gammatone filters are becoming
>>>> increasingly popular in the fields of digital signal processing and music
>>>> analysis as it effectively models the auditory filters of the human
>>>> auditory system. Currently, there are very few implementations of gammatone
>>>> filters available for Python, and these implementations are not generalized
>>>> to basic finite impulse response (FIR) and infinite impulse response (IIR)
>>>> filters like SciPy has.
>>>>
>>>> I have written my own gammatone FIR filter using NumPy based on Malcolm
>>>> Slaney's 1993 paper on the topic (
>>>> https://engineering.purdue.edu/~malcolm/apple/tr35/PattersonsEar.pdf).
>>>> This paper was used for Matlab's implementation of gammatone filters. I am
>>>> in the process of writing a gammatone IIR filter with NumPy and SciPy.
>>>> Please let me know if this feature will fit with the scipy.signal module.
>>>> Appreciate your time and guidance.
>>>>
>>>>
>>>> Thanks,
>>>> Shashaank
>>>>
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