ProtoDAC TDA1387 X8 project

[hifinet]

Yes, you could share the 5V ultracap supply between the RPi and ProtoDAC. The Q7 goes to extreme lengths to isolate the DAC from the RPi. With an RPi4, there are four screaming cores, and you will be injecting that noise into ProtoDAC, around the Q7 isolation. Consider using the FifoPi MA (no isolation) and a RPi Zero W (single core).

Yes, just clip the leads.