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At FITC Amsterdam I demoed my first and fairly simple implementation of a Karplus-Strong implementation. No rx zovirax Together with KP, no rx zovirax we were able to enhance it to sound more like a real guitar. No rx zovirax I think, no rx zovirax the result is already quite impressive, no rx zovirax considering spending just a few hours. No rx zovirax At some point I cannot hear a difference to a real guitar. No rx zovirax This is even more impressive when you think of how it is accomplished. A simple low-pass filtered feedback in a short delay line with the length of one period of the target frequency and some white noise do the first impression of a plugged string in common. No rx zovirax For a guitar you need more tweaking, no rx zovirax randomizing parameters and adding the guitar body resonance to get it more realistic. No rx zovirax But the basic is done with an algorithm, no rx zovirax discovered 1978! I really like the elegance of the circuit. No rx zovirax You basically bring in chaos (white noise contains all frequencies) and the system is going to stable itself and produces a nice waveform, no rx zovirax perfectly suggesting a plugged string. Naturally we are already planning an AudioTool plugin for synthesizing different guitars. No rx zovirax But I am worried about the footprint of the algorithm. No rx zovirax I stumbled over this comment which pointed out that the Karplus-Strong algorithm is patented. No rx zovirax That is tough. No rx zovirax At the time being this algorithm was a great accomplishment! But now where even Flash is able to playback code-generated audio data, no rx zovirax I would think that someone may stumble over this method even by accident. No rx zovirax It is better to commit our lawyer with this issue, no rx zovirax but as the comment says, no rx zovirax it is a really good example how bad code-patents are. Listen and picture it for yourself. (Check the CPU!) The implementation has a static set, no rx zovirax but gives you some control on how the guitar is played. No rx zovirax Nothing really magic. No rx zovirax Definitely it would be a perfect addition to the AudioTool.