Hello everyone,
I have this idea of making a minimalist audio interface that will have great THD+N specifications of -120dB / -117dB.
On the analog part of things I am thinking to have two input/output channels switchable between balanced/unbalanced XLR / RCA connectors. Both input channels will have Gain controls. Output channels will have Volume control (better if digital, but analog is fine too).
On the digital part of things I am thinking about USB, COAX, and maybe TOSLINK inputs. It would be nice to have the ability to switch between those with a button and three LED confirming the input.
This is the part where I lack knowledge in terms of how to make it work in a simple manner. I know of CM102 chip that allows to connect DAC chip to the PC via the USB - https://www.cmedia.com.tw/products/USB20_FULL_SPEED/CM102AplusSplus.
But it only allows 48kHz sampling rate. Also, how would it all interact between DAC chip and ADC chip at the same time? I also have seen XMOS chips used for tying USB and DAC/ADC together?
If this project is successful I plan on designing DIY friendly board and posting Gerber files as open source for diy community to enjoy.
Any help will be appreciated.
Thanks,
Pavlo
I have this idea of making a minimalist audio interface that will have great THD+N specifications of -120dB / -117dB.
On the analog part of things I am thinking to have two input/output channels switchable between balanced/unbalanced XLR / RCA connectors. Both input channels will have Gain controls. Output channels will have Volume control (better if digital, but analog is fine too).
On the digital part of things I am thinking about USB, COAX, and maybe TOSLINK inputs. It would be nice to have the ability to switch between those with a button and three LED confirming the input.
This is the part where I lack knowledge in terms of how to make it work in a simple manner. I know of CM102 chip that allows to connect DAC chip to the PC via the USB - https://www.cmedia.com.tw/products/USB20_FULL_SPEED/CM102AplusSplus.
But it only allows 48kHz sampling rate. Also, how would it all interact between DAC chip and ADC chip at the same time? I also have seen XMOS chips used for tying USB and DAC/ADC together?
If this project is successful I plan on designing DIY friendly board and posting Gerber files as open source for diy community to enjoy.
Any help will be appreciated.
Thanks,
Pavlo
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I was able to find a board from DIYINHK - https://www.diyinhk.com/shop/audio-...sd256-usb-tofrom-i2sdsdreclock-spdif-pcb.html
Hey there,
I'm in the process of designing something very similar. There are already very cool and affordable boards out there doing just that.
for USB > DAC the i2SoverUSB is all you need, or if you are looking for an example delivering a lot of IO + DSP on one board, take a look at the FreeDSP Aurora.
Do you already have a DAC circuit ready? I'm looking for one right now
Best
I'm in the process of designing something very similar. There are already very cool and affordable boards out there doing just that.
for USB > DAC the i2SoverUSB is all you need, or if you are looking for an example delivering a lot of IO + DSP on one board, take a look at the FreeDSP Aurora.
Do you already have a DAC circuit ready? I'm looking for one right now
Best