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Forum Index : Microcontroller and PC projects : Alternatives

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basicchip

Newbie

Joined: 25/11/2014
Location: United States
Posts: 9

Posted: 09:59am 25 Nov 2014

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That is I2S, inter-IC sound. A standard method of generating and sending sound around electronics.

There are also Digilent boards that take in I2S and output CD quality stereo. We combined these with an LPC4330 to generate 5.1 audio from USB connection to a PC. The PC was putting out stereo and we were using commercial audio processing algorithms running on the LPC4330 to generate the additional channels. This demo was shown a couple years back at an Embedded Systems Conference.

Basically I2S is typically 24bit stereo serial digital signal, with clock and framing.

Like I say I play with music in the lab.

hitsware
Guru

Joined: 23/11/2012
Location: United States
Posts: 535

Posted: 03:27pm 25 Nov 2014

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> a Picaxe 20M2 or 14M2 series microcontroller
> can generate 4 PWM signals but only three of
> these can have independant frequencies

Thank You Goeytex .... Yes Indeedy !

I'll need to work out a subroutine to make
the transition of frequency to period more
facile, but that's O.K.

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