Pi 4 to I2SoverUSB_FIO to ProtoDAC 1387 X8

[Skip Pack]

(this is a duplicate post to one I made last night over on the MoOde Audio site ProtoDAC thread. Positing here was a suggestion from there)

I received my JLS I2SoverUSB_FIO card this week and am looking to use one of my ProtoDACs as a standalone USB input dac. Most of the installation seems very simple with good instructions.

http://www.jlsounds.com/uploads/I2SoverUSB_FIO.pdf

I need to select a configuration for four jumpers to match the needs of the ProtoDAC, and the list of choices does not explicitly match what I have learned about the most basic MoOde player I2S description (basic 'HifiBerry' passive dac without masterclock). The basic I2S configuration (J3-J6 open) and the TDA1541 in I2S mode in 32-bit frame (J3 open, J4 closed, J5-J6 open) look to be the best bets. These two are from the .pdf cited above.

I'm likely being too cautious, so I thought I'd ask before just trying them. Help Most Welcome

Thanks,

Skip

 

[zoom777]

Hello Skip,
You mentioned that the ProtoDac is standalone USB input DAC.
So I assume you will be using PI4 USB output to JLSounds, and then i2s outputs from JLSounds to ProtoDac.
If my assumption is correct, then this would be the way :

 

[Skip Pack]

Thanks, The ProtoDAC was designed as a hat for almost all models of Raspberry Pi SBCs, and receives its I2S input from the standard GPIO header. Several folks have turned them into standalone units with SPDIF and USB inputs. The I2SoverUSB_FIO unit looked like a very solid way to gain power isolation and signal reclocking without a lot of other issues. However, I'd never seen the correct jumper configuration on the JLS board specified for connection to the ProtoDAC. Your suggestion above is the one I considered most likely, but I thought looking for some advice might be wise. I tend to be a little cautious about stumbling into a situation where I damage the unit, not that it hasn't happened in the past. I appreciate your input.

Skip

 

[zoom777]

I need to select a configuration for four jumpers to match the needs of the ProtoDAC, and the list of choices does not explicitly match what I have learned about the most basic MoOde player I2S description (basic 'HifiBerry' passive dac without masterclock).

You are likely to have known about this but under Moode Audio Config/Devices/I2S Audio Device, you should choose 'None' since you are using the USB output instead of I2S direct from PI4 to the DAC HAT.