Data Sheet

PRELIMINARY
VS1063a Datasheet
10 OPERATION
10.7.5 Playing Encoded Data
In order to play back your encoding, all you need to do is to provide the file through SDI as you
would with any audio file.
10.7.6 Encoder Samplerate Considerations
For encoder samplerates to work accurately, it is recommended to load and run the VS1063a
Patches package. It is is available at http://www.vlsi.fi/en/support/software/vs10xxplugins.html .
When the VS1063a Patches package, v1.2 or higher, is installed, then almost all recording sam-
plerates for almost all encoders can be represented accurately. The only exception is Stereo
Ogg Vorbis recording at over 32 kHz, in which case recording speed may not be accurate.
Below is a encoding samplerate accuracy table for all standard MP3 samplerates, with nominal
crystal speed XTALI = 12.288 MHz.
Example encoder samplerates, XTALI = 12.288 MHz
Requested f
s
Actual f
s
Error Note
48000 Hz 48000 Hz 0.00 %
44100 Hz 44100 Hz 0.00 % All except Ogg Vorbis stereo.
44100 Hz 44201 Hz +0.23 % Ogg Vorbis stereo; not recommended for streaming.
32000 Hz 32000 Hz 0.00 %
24000 Hz 24000 Hz 0.00 %
22050 Hz 22050 Hz 0.00 %
16000 Hz 16000 Hz 0.00 %
12000 Hz 12000 Hz 0.00 %
11025 Hz 11025 Hz 0.00 %
8000 Hz 8000 Hz 0.00 %
10.7.7 Encode Monitoring Volume
In VS1063a writing to the SCI_VOL register during encoding mode will update monitoring vol-
ume.
Version: 0.42, 2011-11-24 60