Kinda depends on whether the "sound chip" is emulated. For example, the MOS6581 doesn't seem to be emulated here. You could emulate the UI and controls of an Elektron SIDStation, but you wouldn't be able to get the sounds to play unless you had a real SID chip in there. So in that sense, just running the UI and controls would be fine for an emulator if there was a real MOS chip somewhere to take in audio.