Distorted sound WPC

I had an issue with a sound board that was working OK and then suddenly became very distorted – sounded like it was being played underwater, and most of the louder sounds were completely blown out.

I replaced a heap of capacitors without any luck.  In the end, i replaced 5 more capacitors – i am unsure which one (or ones) made the difference as i changed them all before testing again.  The ones i changed were:

C34 and C37 (one was a 47uF, the other 1uF – i don’t recall which was which)

C26,C27,C28,C29 (all 1uF)

Many of these were tantalum capacitors, but i replaced them with more readily available electrolytics.  Anyway, the sound is back to completely normal now.  If i come across this issue again, i will try and narrow it down to the exact capacitor!

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