Hey, Kim, I liked your patch, it has some very nice sound to it, and I like being able to pan through the pluck/transducer location to hear all the harmonics. That's really cool. Now the way I see it, you could implement this as a sort of ping-pong delay with the separate damping filters and *build-in* pd's own 64-sample block delay time into the delay lines (subtract off the approx ~1.5 ms for 64-samples). This would mean that you have a minimum delay time of ~1.5 ms for the forward and backwards travelling waves (and consequently limits your fundamental freq--so, if you need higher frequencies, that's when you would need to reduce the blocksize). Then, you just have to include a couple of taps on each delay line to take the results and sum them together. I'll have another look at it later, and see if I can modify it. Chuck