the hard part isn't the notes. it's the per-frame register pokes. galway and hubbard did things like sweeping filter cutoff every frame, gating ring mod between voices, retriggering ADSR mid-note. SID drivers are basically tiny tracker engines running 50hz interrupts on the c64. the .sid format captures the 6510 driver code but stripping that into pattern notation throws away the actual sound. you can transcribe wizball's melody to strudel and it'll be recognizable. it won't sound like galway. the sound IS the register schedule, not the notes on top of it.

Taking a brief look at wizball.asm, it actually used 200 Hz interrupts on both PAL and NTSC. The timings are shown from line 39.