So I'm doing this song, right? It calls for the melody (orchestra hits by the way; if anyone could help me get a better sound I'd be thrilled) to be octaved, and even though I set the volume down on the second channel the notes still collide and sound weird... Could someone help me with that?
You might try dropping the volume down on both square channels and detuning one of them using the Pxx command. somewhere between P7D and P83. I don't think you're going to be able to get it to sound like an orchestra hit, though (unless you use the DPCM channel).
My suggestion would be maybe use on the upper octaves a different pulse width, and a volume envelope with a short hold then quick decay. That way you'd get initial brightness from S1, then a falloff to just the duller S2 sound.