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

[Ralf Gommers]

On Fri, Mar 6, 2020 at 9:36 PM Shashaank Narayanan <shashaank.n at columbia.edu>
wrote:

> 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.
>

Hi Shashaank, Eric and Todd are both interested and no one has brought up a
concern, so let's call it good - please go for it!

Cheers,
Ralf


> - 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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