SID+17</A>      Voice 3: Pulse Waveform Width - High-Nybble
  |   <A HREF="SID18.HTM">$D412/54290/SID+18</A>      Voice 3: Control Register
  |   <A HREF="SID19.HTM">$D413/54291/SID+19</A>      Voice 3: Attack / Decay Cycle Control
  |   <A HREF="SID20.HTM">$D414/54292/SID+20</A>      Voice 3: Sustain / Release Cycle Control
  |   <A HREF="SID21.HTM">$D415/54293/SID+21</A>      Filter Cutoff Frequency: Low-Nybble
  |   <A HREF="SID22.HTM">$D416/54294/SID+22</A>      Filter Cutoff Frequency: High-Byte
  |   