I removed the sound command from my main program just so I could focus on that. The only line of code I have now is:

sound portc.0, [100,100]

the LED tied to portc.0 lights up, but all I get is an initial click from the speaker. I've tried 6-10 different capacitors and that doesn't help either.

Anyone have any other thoughts? I've tried changing the tone from 1 to 127 and no change. When I use one of the "white noise" tones, say 157, then I do see the LED flicker and the speaker crackles with the LED flicker.

I wish I had a scope, but I don't.

Any other thoughts?