On 06/26/2018 10:25 PM, Tim wrote: > > > On 06/26/2018 03:55 PM, Hans Wilmers wrote: >> On 06/26/2018 08:32 PM, Spencer Jackson wrote: >>> >>> >>> I don't know of anyone really working on polyphonic pitch recognition in >>> the open source world. I think Bayesian filtering of some kind though >>> would be compelling. Perhaps some of the work from ISSE >>> (http://isse.sourceforge.net/) could be used and made realtime. >>> >> >> There is a SuperCollider plugin by Nick Collins called PolyPitch, which >> does what the name suggests. >> The source is GPL, and available here: >> https://composerprogrammer.com/code.html >> >> / Hans > > From Klapuri, "Multipitch analysis of polyphonic music and > speech signals using an auditory model", from PolyPitch: > > "The method consists of a computational model of the > human auditory periphery, followed by a periodicity analysis > mechanism where fundamental frequencies are iteratively > detected and canceled from the mixture signal." > > Wow. That seems much different than all the other papers I read. > Wonder how well it works, especially if applied to guitar. > > It sort of reminds me of how I once was part of Sony's rollout of > Surround Retrieval System technology. > It was TV surround speakers modeled based on human hearing, > to make one pair of these speakers simulate a truer surround. > > Tim.
I have used PolyPitch for resynthesis of violin sounds. It does detect double stops, though there were also false positives. I have no idea how it would perform with a guitar, but if you ask Nick Collins, he will give you a hint. / Hans --- Hans Wilmers Notam Sandakerveien 24 D, bygg F3 N-0473 Oslo Norway tlf.: +47 22358060 mob.: +47 92459361 http://www.notam02.no _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
