clean with conditional pops at hi-nybble cross-overs:

    The pop amplitude appears to be dependent on the timing of the POKEY reset
    and/or pulse-width configuration on the lo-nybble.

    FINELEVELS: 14
    PULSE: 3/5

    FINELEVELS: 6
    PULSE: 10/14

    FINELEVELS: 5
    PULSE: 3/6

    FINELEVELS: 11
    PULSE: 24/28

consistent pop:

    FINELEVELS: 8
    PULSE: 0/2

whine:

    FINELEVELS: 6
    PULSE: 5/8

growl:

    FINELEVELS: 7
    PULSE: 6/9

ring:

    FINELEVELS: 10
    PULSE: 1/3

ground-hiss:

    FINELEVELS: 6
    PULSE: 4/7

    FINELEVELS: 11
    PULSE: 2/4

    FINELEVELS: 12
    PULSE: 2/4

    FINELEVELS: 13
    PULSE: 2/4

    FINELEVELS: 8
    PULSE: 8/11

swimming:

    FINELEVELS: 15
    PULSE 19/22

    FINELEVELS: 8
    PULSE 16/20

    FINELEVELS: 4
    PULSE: 2/5

    FINELEVELS: 4
    PULSE: 6/10

    FINELEVELS: 14
    PULSE: 110/119

16 ok:

    WAVEFORM: TRI156
    FINELEVELS: 16
    OFFSET: 0
    PULSE: 4/6

16 pops:

    WAVEFORM: TRI156
    FINELEVELS: 16
    OFFSET: 3
    PULSE: 4/6

pops:

    FINELEVELS: 16
    PULSE: 3/5

crazy:

    FINELEVELS: 16
    PULSE: 238/241

    FINELEVELS: 16
    PULSE: 238/242

    FINELEVELS: 16
    PULSE: 197/199

Demo pulse aligning / not aligning with transitions

    FINELEVELS: 16
    PULSE: 3/5
    OFFSET: 3,5,10,12,17,19,24 - OK, OTHERS - SMALL SPIKES

    FINELEVELS: 16
    PULSE: 224/226
    OFFSET: EVEN - NO SPIKES, ODD - HUGE SPIKES