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Sound processing design #1

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daviderovell0 opened this issue Jan 23, 2020 · 3 comments
Closed

Sound processing design #1

daviderovell0 opened this issue Jan 23, 2020 · 3 comments
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@daviderovell0 @deetrone

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@daviderovell0
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We need to design specifications for the audio processing of bzzzbz video synth.

Currently ADC chip with jack input seems the most reasonable option.
@deetrone
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E-mail Dr Porr to see if we can use external sound cards (hats)
Research available hats (important 192kHz, price, in/out?)

@deetrone
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OG I2S specification:
https://web.archive.org/web/20080706121949/http://www.nxp.com/acrobat_download/various/I2SBUS.pdf

Pi as an oscilloscope (Kernel building stuff):
https://digibird1.wordpress.com/raspberry-pi-as-an-oscilloscope-10-msps/

Sticky thread on RPi forum re: I2S:
https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=8496&start=575#p604231

@deetrone
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I2S GPIO connections to TI PCM1808 ADC:

BCK/SCK - PCM-CLK-18 - pin8 on ADC (BCK)

WS/LRCLK/FS - PCM-FS 19 - pin7 on ADC (LRCK)

SDIN - PCMDIN 20 - pin9 on ADC (DOUT)

  • clock, SCKI on ADC which is the "fast clock"

@daviderovell0 daviderovell0 mentioned this issue Feb 17, 2020
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