Shachar Shemesh wrote:
Ian Stirling wrote:
There are 2 D/A, 2 A/D flexibly routed, and one D/A that is dedicated
to the earpiece.
About the only limitation is that you can't do things that would
require more IO sources than are available.
For example, playing stereo MP3, and acting as voicemail/answerphone
may not be possible.
(It'd have to drop to mono).
Lost you there. You seem to suggest the following route for recording
voice calls:
1. Call arrives compressed with a GSM codec
2. Phone decompresses codec
3. Phone moves uncompressed stream through D2A
4. Phone further moves stream through A2D
5. Phone compresses the resulting stream
6. Phone saves compressed stream, presumably to the flash
Why not just do:
1. Call arrives compressed with a GSM codec
2. Phone saves compressed stream to flash
Because the GSM modem outputs analog.
It does not output digital information.
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