Old 02-22-2021, 12:30 AM   #1
clepsydrae
Human being with feelings
 
clepsydrae's Avatar
 
Join Date: Nov 2011
Posts: 2,868
Default ReaSynth still out of tune?

[update: looks like ReaTune is out of tune, not ReaSynth...]

I'm aware of https://forum.cockos.com/showthread.php?t=143655 which triggered a fix for ReaTune pitch issues in 2014.

...but I just found that ReaSynth still plays a little out of tune , especially in the upper ranges. Maybe it's intended?

I find it starts to go out around C6, it's about 1-2c sharp at C7 and C8, C#8 is 7.23c sharp, and from there to C9 it goes a little crazy, with some notes 10 or 20c off, C9 30c sharp, etc. I know that's not a particularly usable octave, but I discovered this because I used it in a video about psychoacoustic effects, and an attentive listener pointed out that there shouldn't be a beating when A3/E4 are played together (video link), but there is, due to A3 being .02c flat and E4 being .03c sharp.

Last edited by clepsydrae; 02-23-2021 at 03:31 PM.
clepsydrae is offline   Reply With Quote
Old 02-23-2021, 02:03 AM   #2
Tale
Human being with feelings
 
Tale's Avatar
 
Join Date: Jul 2008
Location: The Netherlands
Posts: 3,187
Default

Quote:
Originally Posted by clepsydrae View Post
I find it starts to go out around C6, it's about 1-2c sharp at C7 and C8, C#8 is 7.23c sharp, and from there to C9 it goes a little crazy, with some notes 10 or 20c off, C9 30c sharp, etc.
I've just checked by comparing ReaSynth to a known good generator, and I think ReaSynth is perfectly in tune... Are you using ReaTune to measure this? Because ReaTune seems less precise at frequencies closer to half the sample rate, and at 44.1 kHz it indeed shows 8520.45 Hz instead of 8372.02 Hz (i.e. +30.43 cents) for C9.

Quote:
Originally Posted by clepsydrae View Post
I know that's not a particularly usable octave, but I discovered this because I used it in a video about psychoacoustic effects, and an attentive listener pointed out that there shouldn't be a beating when A3/E4 are played together (video link), but there is, due to A3 being .02c flat and E4 being .03c sharp.
Well, this depends on what tuning you are using. In some tunings the ratio between E4/A3 = 1.5, so then yeah, they would be phase-locked. However, I assume ReaSynth uses 12-TET, so then E4/A3 = 2^(7/12), and 2^(7/12) is an irrational number, hence the beating.
Tale is offline   Reply With Quote
Old 02-23-2021, 02:43 PM   #3
Daodan
Human being with feelings
 
Join Date: Jan 2011
Posts: 32
Default

Maybe you just set "oldschool sine-wave generator (detuned at HF)? little checkbox at the bottom of ReaSynth.
Daodan is online now   Reply With Quote
Old 02-23-2021, 03:13 PM   #4
clepsydrae
Human being with feelings
 
clepsydrae's Avatar
 
Join Date: Nov 2011
Posts: 2,868
Default

Yes! Turns out to be ReTune with the potential bug... it's not working so well over C6 or so. Even a bit wobbly in C5-C6, and I wouldn't use it at all over C7 (for sine tones, anyway). A tuner I wrote myself shows that ReaSynth is fine throughout it's range, but whatever settings I use in ReaTune it's not great over C5.

Quote:
Originally Posted by Tale View Post
Well, this depends on what tuning you are using. In some tunings the ratio between E4/A3 = 1.5, so then yeah, they would be phase-locked. However, I assume ReaSynth uses 12-TET, so then E4/A3 = 2^(7/12), and 2^(7/12) is an irrational number, hence the beating.
This part was explained by user error; the beating I was hearing was low-frequency (i.e. not a normal 12-TET fifth), but my A3/E4 interval was accidentally detuned due to incorrect automation.
clepsydrae is offline   Reply With Quote
Old 02-24-2021, 01:23 AM   #5
Tale
Human being with feelings
 
Tale's Avatar
 
Join Date: Jul 2008
Location: The Netherlands
Posts: 3,187
Default

Quote:
Originally Posted by clepsydrae View Post
A tuner I wrote myself shows that ReaSynth is fine throughout it's range, but whatever settings I use in ReaTune it's not great over C5.
Any chance that you could share your own tuner?
Tale is offline   Reply With Quote
Old 02-24-2021, 08:45 PM   #6
clepsydrae
Human being with feelings
 
clepsydrae's Avatar
 
Join Date: Nov 2011
Posts: 2,868
Default

Some day! I've been trying to decide (forever now) whether to commercialize it or not, along with some other ideas... haven't gotten my butt in gear to make it happen. If I don't, I certainly will share.
clepsydrae is offline   Reply With Quote
Old 03-02-2021, 01:40 AM   #7
Tale
Human being with feelings
 
Tale's Avatar
 
Join Date: Jul 2008
Location: The Netherlands
Posts: 3,187
Default

Fair enough, thanks!
Tale is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 07:16 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.