No worries! Audio emulation can be hard for a couple of other reasons too: Firstly, it's sometimes easy to tell that something "isn't quite right", but unless you have awesome ears (I don't), it's hard to hear exactly what the problem is. Secondly, audio isn't the sexiest part of emulator development - it often gets overlooked, and consequently there's far less information available about it.
As it happens, audio emulation on the ZX-Spectrum 48k is easier: There's a one-bit on/off output wired to a speaker. Even generating tones has to be done by timing Z80 cycles! Some people still managed to do amazing things using pulse-width modulation.
As it happens, audio emulation on the ZX-Spectrum 48k is easier: There's a one-bit on/off output wired to a speaker. Even generating tones has to be done by timing Z80 cycles! Some people still managed to do amazing things using pulse-width modulation.