Elastique - noise with multichannel files

jm duchenne · 09-10-2016, 02:02 AM

Hi,

If the files' channels number is 49 or more, every timestretching or pitch with one of the Elastic algorithms results of only high pitch noise at high level (or nothing at all).
It is 100% reproducible on all versions I have tested.

The problem does not occur with up to 48 channels or with the other algorithms.

jm duchenne · 10-08-2016, 04:35 AM

Hello,

Could you take some time to look at this bug ?
I know that it will not worry a lot of people, but it is a bug nevertheless, and it annoys me at least ;-)

By the way, it happends all the same in the macOS version.

Thanks in advance !

jm duchenne · 11-17-2016, 10:01 AM

Hello again,

How could I know that this bug report has been seen by the devs and that there is some chance that it will be solved ?
Or could you tell me if it is not possible ?

I understand that I am perhaps the only one that has a problem with it, but I am stucked in some projects since I have reported it...
Thanks.

Xenakios · 11-17-2016, 01:16 PM

Maybe it's a limitation in the Zplane algorithm. The Reaper developers could then only do some hack to work around that, I guess.

jm duchenne · 11-17-2016, 01:43 PM

Yes, maybe ?

Thus it would be nice to know ;-)

jm duchenne · 12-13-2016, 01:32 AM

Hi, Justin and C°, could you just tell if :
1. you have read this BR
2. you can confirm the reported behaviour or I make some mistake
3. it doesn't depend on Cockos devs
4. you will look later
5. other...

Thanks anyway !

vitalker · 12-13-2016, 03:24 AM

Quote:

Originally Posted by jm duchenne

Hi...

Did you read this? http://forum.cockos.com/showthread.php?t=36653

jm duchenne · 12-13-2016, 04:07 AM

Yes, thanks.
But I thought that I had given all the necessary clues, since it is very simple and always reproducible, in all platforms, when set as described.
I don't know what I could give more... but I can try ;-)

So, a more detailed description :
- conditions : multichannel audio files with 49 channels and more
- action : change pitch only or time with constant pitch (timestretch)
- selected algorithm : Elastic all versions
- result : high level and pitch noise burst (can be more than +100 db), OR silence, OR other kinds of noise/silence balance, more or less random ?
- no crash, no error
- no problem if there is no pitch change (speed only)
- no problem with Soundtouch and Windowed algorithms
- no problem with files with up to 48 channels
- computers / OS : Windows 7/10, MacOS 9/10, various processors from Atom to Core i7
- Reaper version : 5x (not tried with 4)

jm duchenne · 03-01-2023, 05:18 AM

Hi,

A little reminder for this long range bug (soon 7 years since my first post...).

Its conditions and effects have not change since my last description, and apparently it has not embarrassed a lot of people ;-)

But maybe now, with the fashion for ambisonics, some will also encounter it, at least if they use 6th or 7th order encoded files.

So please, if it does not depend on Reaper and the Elastic algo cannot handle more than 48 channels, could you find a way to prevent its use so as to avoid the inconveniences that are linked to the bug?

Thanks!

Justin · 03-02-2023, 08:53 PM

Fixing this (it will create multiple shifters on very large channel counts -- as a side note we could potentially add multi-mono and multi-stereo modes to all of the pitch shifters, mmmm)

Phazma · 03-03-2023, 02:50 AM

Quote:

Originally Posted by Justin

Fixing this (it will create multiple shifters on very large channel counts -- as a side note we could potentially add multi-mono and multi-stereo modes to all of the pitch shifters, mmmm)

If you are fixing Elastique, could you please look st this issue too?
https://forum.cockos.com/showthread.php?t=274675

jm duchenne · 03-03-2023, 06:32 AM

Thanks a lot Justin, it is much appreciated!

About the multi-mono option, I guess that it will be very interesting with the Soloist versions.

jm duchenne · 03-04-2023, 08:49 AM

Quote:

Originally Posted by Justin

Fixing this (it will create multiple shifters on very large channel counts -- as a side note we could potentially add multi-mono and multi-stereo modes to all of the pitch shifters, mmmm)

Tested in +dec0303 : works well except for élastique 2.2.8 Efficient which make Reaper crash instantly (Pitch or Timestretch modes).

Justin · 03-05-2023, 11:17 AM

Quote:

Originally Posted by jm duchenne

Tested in +dec0303 : works well except for élastique 2.2.8 Efficient which make Reaper crash instantly (Pitch or Timestretch modes).

Try 0305, maybe it'll help

jm duchenne · 03-05-2023, 01:36 PM

Ah, yes, perfect now : thanks a lot!

09-10-2016, 02:02 AM	#1
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Elastique - noise with multichannel files Hi, If the files' channels number is 49 or more, every timestretching or pitch with one of the Elastic algorithms results of only high pitch noise at high level (or nothing at all). It is 100% reproducible on all versions I have tested. The problem does not occur with up to 48 channels or with the other algorithms. Last edited by jm duchenne; 10-08-2016 at 04:38 AM.

11-17-2016, 01:16 PM	#4
Xenakios Human being with feelings Join Date: Feb 2007 Location: Oulu, Finland Posts: 8,062	Maybe it's a limitation in the Zplane algorithm. The Reaper developers could then only do some hack to work around that, I guess. __________________ I am no longer part of the REAPER community. Please don't contact me with any REAPER-related issues.

12-13-2016, 01:32 AM	#6
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Hi, Justin and C°, could you just tell if : 1. you have read this BR 2. you can confirm the reported behaviour or I make some mistake 3. it doesn't depend on Cockos devs 4. you will look later 5. other... Thanks anyway ! Last edited by jm duchenne; 08-12-2018 at 12:43 AM.

03-01-2023, 05:18 AM	#9
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Hi, A little reminder for this long range bug (soon 7 years since my first post...). Its conditions and effects have not change since my last description, and apparently it has not embarrassed a lot of people ;-) But maybe now, with the fashion for ambisonics, some will also encounter it, at least if they use 6th or 7th order encoded files. So please, if it does not depend on Reaper and the Elastic algo cannot handle more than 48 channels, could you find a way to prevent its use so as to avoid the inconveniences that are linked to the bug? Thanks! __________________ Acousmodules: multichannel / spatial audio plugins http://acousmodules.space

03-03-2023, 06:32 AM	#12
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Thanks a lot Justin, it is much appreciated! About the multi-mono option, I guess that it will be very interesting with the Soloist versions. __________________ Acousmodules: multichannel / spatial audio plugins http://acousmodules.space

10-08-2016, 04:35 AM	#2
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Hello, Could you take some time to look at this bug ? I know that it will not worry a lot of people, but it is a bug nevertheless, and it annoys me at least ;-) By the way, it happends all the same in the macOS version. Thanks in advance !

11-17-2016, 10:01 AM	#3
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Hello again, How could I know that this bug report has been seen by the devs and that there is some chance that it will be solved ? Or could you tell me if it is not possible ? I understand that I am perhaps the only one that has a problem with it, but I am stucked in some projects since I have reported it... Thanks.

11-17-2016, 01:43 PM	#5
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Yes, maybe ? Thus it would be nice to know ;-)

12-13-2016, 04:07 AM	#8
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Yes, thanks. But I thought that I had given all the necessary clues, since it is very simple and always reproducible, in all platforms, when set as described. I don't know what I could give more... but I can try ;-) So, a more detailed description : - conditions : multichannel audio files with 49 channels and more - action : change pitch only or time with constant pitch (timestretch) - selected algorithm : Elastic all versions - result : high level and pitch noise burst (can be more than +100 db), OR silence, OR other kinds of noise/silence balance, more or less random ? - no crash, no error - no problem if there is no pitch change (speed only) - no problem with Soundtouch and Windowed algorithms - no problem with files with up to 48 channels - computers / OS : Windows 7/10, MacOS 9/10, various processors from Atom to Core i7 - Reaper version : 5x (not tried with 4)

03-02-2023, 08:53 PM	#10
Justin Administrator Join Date: Jan 2005 Location: NYC Posts: 16,335	Fixing this (it will create multiple shifters on very large channel counts -- as a side note we could potentially add multi-mono and multi-stereo modes to all of the pitch shifters, mmmm)

03-05-2023, 01:36 PM	#15
jm duchenne Human being with feelings Join Date: Feb 2006 Location: France Posts: 930	Ah, yes, perfect now : thanks a lot! __________________ Acousmodules: multichannel / spatial audio plugins http://acousmodules.space