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by IBM Portable PC
Mon Apr 27, 2015 11:11 pm
Forum: Advanced users
Topic: GPIO G.711 PCM (not I2S) capture for VOIP apps etc
Replies: 25
Views: 9611

Re: GPIO PCM (not I2S) capture

... avoided the driver issue to some extender by using a VLSI DSP to transcode the PCM data: https://www.raspberrypi.org/forums/search.php?keywords=Vs1063 The VS1063 appears to be able to convert G.711 to 16 bit PCM........... A little more research and the VS1063 needs some code too operate. I'm ...
by mhelin
Mon Apr 15, 2013 11:26 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: ADC audio via SPI
Replies: 11
Views: 17943

Re: ADC audio via SPI

... board, e.g. https://www.sparkfun.com/products/11684 That one supports full-duplex audio I/O using 16-bit PCM: http://www.vlsi.fi/en/products/vs1063.html "A new full-duplex codec mode allows both input and output using many formats: - 16-bit PCM - IMA ADPCM - G.711 u-law and A-law - G.722 ...
by mhelin
Fri Mar 01, 2013 1:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Audio over I2C for guitar effect pedal possible?
Replies: 15
Views: 8934

Re: Audio over I2C for guitar effect pedal possible?

According to this thread it's better to use VS1063 chip for full-duplex I/O though with VS1053 it's possible but a special software (provided by VLSI) is needed: http://www.vsdsp-forum.com/phpbb/viewtopic.php?f=7&t=712 So this is actually the ...

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