Unable to play IMA ADPCM bytes

Designing hardware that uses VLSI Solution's devices as slave codecs such as an external MP3 decoder chip for a host microcontroller.
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Tekbird
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Joined: Fri 2020-05-29 0:35

Unable to play IMA ADPCM bytes

Post by Tekbird » Fri 2020-05-29 11:59

I am trying to develop a hardware using AVR to play some IMA ADPCM encoded PCM audio. Source PCM audio is 8khz 16 bit. I have attached the audio file that I am trying to playback. The issue is, only a very small portion of the initial audio is played back and then it either gets stuck in some audio or complete silence. When it gets stuck (like an audio cd gets stuck and the audio at that moment keeps repeating), the device becomes unresponsive. I am using a board as attached.

I am not making any changes through SCI, and I suppose the device by default is ready to decode.
Attachments
test1.imaadpcm.wav
(16.06 KiB) Downloaded 23 times

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pasi
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Posts: 1702
Joined: Thu 2010-07-15 16:04

Re: Unable to play IMA ADPCM bytes

Post by pasi » Mon 2020-06-01 10:15

Hi,
I don't have any issue playing the file with vs1053b.

Check that you're using DREQ correctly - and that DREQ is actually working.

What's the vs10xx chip you're using?
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