Specifications

VLSI
Solution
y
VS1053b
VS1053B
9. OPERATION
9.8.4 Playing ADPCM Data
In order to play back your IMA ADPCM recordings, you have to have a file with a header as described
in Chapter 9.8.3. If this is the case, all you need to do is to provide the ADPCM file through SDI as you
would with any audio file.
9.8.5 Sample Rate Considerations
VS10xx chips that support IMA ADPCM playback are capable of playing back ADPCM files with
any sample rate. However, some other programs may expect IMA ADPCM files to have some exact
sample rates, like 8000 or 11025 Hz. Also, some programs or systems do not support sample rates below
8000 Hz.
If you want better quality with the expense of increased data rate, you can use higher sample rates, for
example 16 kHz.
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