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PP-SALB-EVM: Can't pass audio playback check / can't perform SPL test.

Part Number: PP-SALB-EVM

I got it to pass all hardware checks other than plays audio....

However, if you go into audio tuning panel, it seems to unmute and then plays audio from the computer. - so it seems like evm amp is muted .... or something.

As a result all other tests in the characterisation can be performed until it gets to SPL tests. 

Anything I'm missing?