Ah of course! I wasn't setting the volume and didn't notice it is 0 as default - thanks for pointing this out.Woody wrote:You need to check the volume or override it to maximum all the time. You'd be surprised how loud the audio can be when the PWM just looks like a square wave. Tiny modulations have quite a big effect.
From memory there should be a SOF every 1ms, so that's 44.1 samples for each SOF per channel. The L and R samples are interlaced.
It now looks like the sine wave is outputting correctly on the waveform... what cut-off frequency should I be aiming for with the RC filter?