Generating various waveforms with resistive DAC, how to alter pitch?

[Art]

A manual delay should be as fast as asm if you have
defined no clear watchdogs to be inserted in code,
and configure the chip with watchdog off.

delay = 20

...

for count = 0 to delay
next count

For something quicker you could set up a number of delays

Delaytwonops:
@ nop
@ nop
return

Waste four instructions

gosub waste 

...

waste:
return