> On Jun 30, 2024, at 08:43, Michael Koch <astroelectro...@t-online.de> wrote:
>
> Am 30.06.2024 um 14:22 schrieb Media Mouth:
>>
>>>> Which microcontroller are you using?
>>> Either Teensy LC or Seeed Xiao SAMD21. They both have a built-in DAC.
>>> In the meantime I found that "Sonic Visualiser" can open WAV and export CSV.
>>>
>>> Michael
>> I'm not familiar with those but it Teensy does seem to have an optional
>> filesystem akin to the one avail on the esp32
>
> I know, but inserting the waveform into the C source code is much easier. My
> microcontroller boards don't have SD cards.
> The problem is already solved. Preprocessing is done with FFmpeg (load the
> audio file, cut out a segment and change the sample rate), then Sonic
> Visualiser is used for conversion to CSV, then Libre Office for removing the
> first column from the CSV file (I don't need the sample number). Then
> copy-and-paste to the C source.
>
> Michael
Hacky and awesome! Thanks for sharing.
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