On 06/01/2015 22:51, In Mobile wrote:
Not sure though the note extraction is that quick. I do indeed remember also that Axon/terratec stuff did extract pitch information from the transient, then confirming/following using conventional pitch to midi. I *seeem* to remember the best tracking at the time meant a processing time of about 15ms. Tablet/PC softwares claim 6 ms (though it did not check the reality of the claim). If not deluded, a 100 Hz fundamental would mean a period of 10ms. But transient extraction if accurate wouldn't have to wait for a full period ?
You're not deluded. "While the GR-300 barely takes three milliseconds to respond, the VG-99/GR-300 took about 23 milliseconds on average." Source:-http://www.premierguitar.com/articles/return-of-a-legend-does-the-vg-99-live-up-to-the-gr-300-1?page=2
It seems that the 3mS response is achieved without pitch extraction. The first "VCO" isn't an oscillator at at, rather a saw tooth generator which is reset every cycle. (and clipped to even out volume) However the second oscillator is tunable and presumably a true VCO, I'd guess that it trails the first (?) andy