SQ-drive 16-bit stereo wav file playback problem

[narrenschip]

SQ-6 with firmware 1.5.x (the latest that was available end februari) does not detect 16bit WAV files (tested with 44.1kHz and 48kHz files).
Once converted to 24bit the files are detected and play without issue.

Files were created with ffmpeg version 4.4.1 (macports on Mac OS Mojave):
ffmpeg -i SomeAudioFile.mp4 -map_metadata -1 -ar 44100 -c:a pcm_s16le SomeAudioFile_44kHz-16bit.wav
ffmpeg -i SomeAudioFile.mp4 -map_metadata -1 -ar 48000 -c:a pcm_s16le SomeAudioFile_48kHz-16bit.wav
-> not detected by the desk
ffmpeg -i SomeAudioFile.mp4 -map_metadata -1 -ar 44100 -c:a pcm_s24le SomeAudioFile_44kHz-24bit.wav
( or ffmpeg -i SomeAudioFile_44kHz-16bit.wav -c:a pcm_s24le SomeAudioFile_44kHz-24bit.wav )
ffmpeg -i SomeAudioFile.mp4 -map_metadata -1 -ar 48000 -c:a pcm_s24le SomeAudioFile_48kHz-24bit.wav
( or ffmpeg -i SomeAudioFile_48kHz-16bit.wav -c:a pcm_s24le SomeAudioFile_48kHz-24bit.wav )
-> are detected and play fine

-map_metadata -1 : strips all metadata
-ar 44100/48000 : samplerate conversion
-c:a pcm_s16le/pcm_s24le : audio ‘compression’ – 16/24 bit signed integer little-endian PCM format

[Dave Meadowcroft]

I had the need to do this today so I created 6 wav files, also using ffmpeg:
44.1 kHz 16 bit
44.1 kHz 24 bit
48 kHz 16 bit
48 kHz 24 bit
96 kHz 16 bit
96 kHz 24 bit

After dropping into the USBPLAY folder, all the 24 bit files are displayed and play fine. The 16 bit files aren’t displayed so it seems only 24 bit is supported.
Firmware version 1.5.7

[Tobi]

Hi,
thanks for testing all those files… but you could have read about supported file types in the Reference Guide on page 96 🙂

BTW there are some feature request to improve the “Media Player” (sorry for the word, dont have a better one)…

Best Regards,
Tobias

[Dave Meadowcroft]

Hi Tobi,
Except it says:
“These can be mono or stereo, uncompressed PCM *.wav files, 44.1, 48 or 96kHz and 16 or 24-bit”
which is not correct. Only 24-bit is supported.

[Søren Steinmetz]

Just a hunch:

You are sure the files have no Meta data in them ?
(like Artist/Band/Genre information etc. )

[Dave Meadowcroft]

Yes, definitely 100% clean files.
I’ll try converting a 24-bit one that works to 16 though to be sure.

I’ve not tried mono, but I can’t remember the last time I needed one apart from multitrack of course! I will try those as well this weekend if time allows for completeness.

[Author]

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