I hope people are still working with this library. At least I am 
I have got a question. I have built the schematic from the site: Datei:SSDA Better16bit.png – Hackerspace Ffm. When I connect my speaker, I hear a very high pitch tone, which is very annoying. I think this tone is there because of the square wave that is constantly present at PIN 9. So when I'm not playing any audio, I would like PIN 9 to be constant 0 V. When I want to play an audiofile, the square wave should be there again. How do I do that? When I use analogWrite(9,0); the tone is indeed gone, but then the audiofiles are almost not hearable anymore.
sincerely,
Marcel