[Casey]

Originally Posted by dale116dot7

Triangle with random (or maybe not random enough) direction changes, amplitude of maybe 1ms, at about 1/2 Hz.

Try 10ms at 2 Hz

Originally Posted by dale116dot7

The tap spacing of my larger tap count algorithm - three loops but lots of taps per loop - varies as per the room size, so it will vary from maybe a millisecond up to maybe 30 or 40 milliseconds at larger room sizes.

Tap spacing should be such that there is a good chance that the delay between taps can be seen as enough to assure decorrelated signals. Statistically it turns out that 50ms or more will work on average over many tap pairs. Without statistical deccorelation you will have, as you have found, very strong comb filtering effects.

Originally Posted by dale116dot7

So perhaps I have to make sure that the triangle ramp rate and the loop time don't make a pattern so that the allpass times aren't ever the same one pass through

Yes!

Originally Posted by dale116dot7

Would putting a small modulated allpass within the feedback of another allpass break up that one ring?

No! The larger allpass will dominate.



-Casey