27 Jun
2018
27 Jun
'18
10:19 a.m.
On 06/26/2018 10:25 PM, Tim wrote:
On 06/26/2018 03:55 PM, Hans Wilmers wrote:
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
On 06/26/2018 08:32 PM, Spencer Jackson wrote:
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 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