PicoMite: can we explain/fix "ticking" when using PLAY SOUND

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Joined: 05/10/2019
Location: United Kingdom
Posts: 5982
Posted: 12:49pm 20 Mar 2023      

A capacitor in series with R1 may not work. Remember, this is a PWM signal and the audio doesn't exist (it's only a 40kHz carrier) until it's smoothed out by the filter capacitor. You could, possibly, put the capacitor in series with R2 though. Personally I prefer to keep a little loading on the filter cap. It gives you the opportunity to trim things a bit.