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by Paul17041993
Wed Jun 21, 2017 12:30 am
Forum: Graphics, sound and multimedia
Topic: Using the pi 3 as a 16+ channel DSP
Replies: 6
Views: 3390

Re: Using the pi 3 as a 16+ channel DSP

My friend, I have been doing hard real time I/O for ~30 years, on a lot of different micro controllers. It is a LOT more than a "custom driver". Frankly, I am not sure it is feasible at all, even at the lower clock rates. Simultaneously bit-banging 16 channels of I2S audio (8 in, 8 out) in software...
by Paul17041993
Tue Jun 20, 2017 9:40 pm
Forum: Graphics, sound and multimedia
Topic: Using the pi 3 as a 16+ channel DSP
Replies: 6
Views: 3390

Re: Using the pi 3 as a 16+ channel DSP

Good luck. Odds of getting it working in any reasonable amount of time are very low. Not impossible, but with that number of channels: 1) go bare metal 2) dedicate a core to inputs 3) dedicate another core to outputs The issue is jitter free timing. The 25MHz is not something guaranteed for all I/O...
by Paul17041993
Tue Jun 20, 2017 4:50 am
Forum: Graphics, sound and multimedia
Topic: Using the pi 3 as a 16+ channel DSP
Replies: 6
Views: 3390

Using the pi 3 as a 16+ channel DSP

I'm basically looking for something that can handle at least 8 input and 8 output channels, 24bit at 96KHz, and so far I've found that the modern pi should be able to handle that easilly over GPIO, and possibly even a total of 32 channels, 32bit and 192K assuming the 25MHz max applies to all the pin...

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