Analogue-sequencer

> So should the p3 drift slightly along with the 808 in a musical
> fashion? ;)

There shouldn't be much drift in the 808 DIN clock.
The tempo may gradually change with temperature, since the clock is built
from some logic gates, resistors and caps. The thresholds will move slightly
as things warm up, but not so it should really be noticeable as any kind of
'feel'.
The way the 808 CPU resonds to the DIN clock causes a timing variation that
you may notice...
This effect is more noticeable on the 303, which uses the same CPU (with
different code, obviously) and the same method of following the clock.
There is an extra timer circuit interrupting the 808, 303 and 606 CPUs every
2ms or so.
The DIN clock line is checked to see if it has gone high during the
interrupt routine triggered by this extra clock.
So in effect, the 808 CPU quantises the incoming DIN sync to 2ms intervals.
This introduces a very subtle timing shift depending on the underlying tempo
of the clock signal. You very likely wont notice it consciously, although
you can notice the effect on the 303 if you set up a pattern to repeat the
same note every 16th, set up a sound with a very snappy envelope, then
gradually increase the tempo. There is a cyclic shift in the sound as the
relationship between the tempo clock and fixed interrupt clock changes.

Cheers,
Colin f