>>2954042
>>2954053
I actually got too scared of SMT and designed it as through hole, this is me: >>2953646 although some ICs were only available as SMT.

I am about to pull the trigger on ordering the board, but I'm having second thoughts about how careful I need to be about my signals interfering with each other. This is all audio frequency, but there are some square wave "clock" signals that come into the board to control my oscillator circuits, and I'm not sure if I can return those signals through the ground pour, or if they need their own, dedicated ground.

They are 4 kHz square waves, but it was pointed out to me that of course a square wave contains harmonics at much higher frequencies. Then again, I'm only interested in the audible output, so surely I could send them through a passive RC filter with a cutoff frequency in the 100s of kHz and be free from electromagnetic infetterence in the MHz range?