posted 02 December 2011 20:35            

I've been learning some Pat Metheny again and even doing some on the Eigenharp.

Did a little research and this beasty was 100% analog synth. 6 VCOs and 6 Filters and other analog bits to be exact.

There was only 3ms latency between striking the guitar string and the synth sound coming out. That is insane. None of the digital versions came close.

The explanation of how this is accomplished is very interesting and I wonder if it would be possible to model the same algorithmn in KYMA. Of course it would, right?
http://www.joness.com/gr300/patent.htm

Let's say I used a hexaphonic guitar pickup that sent 6 string outputs separately to 6 audio inputs. Then use the algorithmn in the patent to translate this to KYMA. Thoughts? Low latency is critical.

[This message has been edited by bar|none (edited 02 December 2011).]

[This message has been edited by bar|none (edited 02 December 2011).]

posted 05 December 2011 12:49            

Did he get a patent as it all seems pretty dam obvious?

He doesn't say how the initial filter works but using a hi pass to get rid of mains hum and signals below the lowest possible note (per string) and then then low pass with shallow slop ( to make sure that the fundamental is bigger then the first harmonic) followed by a compressor then another lowpass will get the single zero crossing per cycle waveform The string range is not much more than am octave so we can put a sharp cut off filter for anything above that range. Probably wouldn't even need the compressor.

posted 06 December 2011 10:30            

Yes, I have a pacarana.

yes, Roland did get a patent. Although patent life is only 20 years right?

Obvious to you maybe.

So why is it that nobody has taken this concept further? I think it's because digital pitch detection and midi was deemed the future even though they still don't have anything that responds to the guitar like this thing responds. Would be really interesting to take this thing beyond just a basic saw waveform. That was the limiting factor.

I think I understand your steps and I thank you for them. Going to give this a go.