Our customer found a strange issue on ADAU1701.
When they change the selector (red circle), “POP” noise will output from speaker.
1) DSP input is DC block, so it should no noise from input.
2) Selector output connect to nothing, it should not affect the output
The issue is like below movie link:
Even through we have suggested they to using "Clickless SW Slew", still have the problem.
Our customer got the schematic from their end customer, found there have user defined library components in the schematic as below:
If bypassed the Xover3 (Crossover) and EQ2 (user defined EQ), then the problem is fixed;
Otherwise, even though just change the DC input entry to select the Volume Table, the pop noise still happened.
Our customer need us help them to solve the problem, do you have any idea on this issue?