Lpc2000

Brendan,

> I've pointed this out to Philips in the past: hopefully, they'll
> recognise from this that others have the same issue.
>
> None of the work-arounds presented are ideal: a h/w fix is much more
> preferable.

Just thought of this when I saw "h/w fix" ...
That is the easy solution, use a sample&hold replaces the variable
software latencies with a fixed HW one.
Have an interrupt and a match output generated by the timer. On a match
trigger the S&H and write to the DAC from the interrupt routine.
This will introduce a delay of 1 sample time but I don't think that's a
big problem in this case.

A S&H can be easy: one gate of a CD4066 and a capacitor do the trick.
Use the other 3 and some more caps to create a switched capacitor filter :o)

Regards,

      Rob