Re: [LAD] Polyphonic normal guitar to midi: Jam Origins' MIDI-Guitar

Le Mon, 25 Jun 2018 18:31:12 -0400, Tim &lt;termtech(a)rogers.com&gt; a écrit : <snip> To go fast and get a low enough latency, you can use can what time is between 2 consecutive peaks of the signal. Be aware than you would have to smooth the signal because when playing loud and the strings are touching the frets, the harmonic content become so weird you can get false maximums (as seen by a signal analysis of my electrical guitar with a memory oscilloscope), which will give you a much higher fundamental frequency than expected. Normal signal: * * * * * * * * * * * * * * * * * * * * * * *=========*=========*=========*==== * * * * * * * * * * * * * * * * * * Fretted signal: * * * * * ** * * ** * * * * * * * * * * * * * * * * * * * *=========*=========*=========*==== * * * * * * * * * * * * * * * * * * These double peaks can be very huge as an electrical guitar have a huge dynamic during the attack of the notes. Doing a repetitive arithmetic average calculation when the sampling are coming in must be enough to smooth them in real time, and to get ride of other high order harmonics at the same time. The latency will be dependant of the fundamental frequency, something like one period + trigger delay. Cheers, Dom -- If you have a problem and you are not doing anything to fix it, you are at the heart of the problem.