Hi everyone, I have been working on a 6-in 8-out RPi5 soundcard. I will copy/paste my design parameters from the original thread:
My initial prototype circuit (documented here) had some flaws which I corrected and it is now fully functional. However, it became clear that the physical layout could do with some improvements. Specifically:
What I'm wondering is whether anyone would be interested in testing one of these. I would charge you somewhere around $60USD, to cover the cost of components, plus you would need to cover shipping from Australia.
I believe this is the first multi-channel soundcard for the Raspberry Pi that has both inputs and outputs, and I am considering applying to launch on Crowdsupply if this testing is successful.
(FYI I will include both RCA sockets and headers so you can populate whichever you like).
Please comment below if you are interested in being involved and I will DM you.
This is not supposed to be an audiophile device - it is just supposed to work (especially the first version). My particular use case is to allow a Pi to act as the brains of my DIY DSP-capable AVR, without needing to send the sound out over HDMI (this has some issues and takes up much more space).
- Decent performance for reasonable price (<-90dB THD+N for ~$100AUD parts)
- 8 channels out, 6+ channels in
- At least 96kHz sampling rate
- Full isolation from the Pi - so it will not use the Pi's power supply either.
- Single-ended inputs/outputs
My initial prototype circuit (documented here) had some flaws which I corrected and it is now fully functional. However, it became clear that the physical layout could do with some improvements. Specifically:
- Move power, input & output circuitry to separate board, allowing the mainboard to comply with HAT form factor
- Boards are 2-layer (cheaper than the prototype which was 4-layer)
- Allow power/input/output boards to be separated from each other if desired
- Ability to mount RCA sockets to the PCB
What I'm wondering is whether anyone would be interested in testing one of these. I would charge you somewhere around $60USD, to cover the cost of components, plus you would need to cover shipping from Australia.
I believe this is the first multi-channel soundcard for the Raspberry Pi that has both inputs and outputs, and I am considering applying to launch on Crowdsupply if this testing is successful.
(FYI I will include both RCA sockets and headers so you can populate whichever you like).
Please comment below if you are interested in being involved and I will DM you.