Audio: Speakers with animated pitch cause clicks in rendered animations, crashes or huge filesizes in rendered audio #41133

New Issue

Tom Benedett · 2014-07-21T04:13:47+02:00

Tom Benedett commented

2014-07-21 04:13:47 +02:00

(Please add "Audio" to project tags. I find myself unable to do anything but delete existing project tags.)
System Information
OS: Windows 7 640but, GPU: GTX 580
also
OS: Windows 8.1 64-bit, GPU: FeForce CT 735M

Blender Version
Broken: As recently as BuildBot 2.71 5e3e095 to as early as official 2.65a, at least.

Short description of error
A rendered animation containing a speaker with pitch keyframed to go from very low to very high rapidly can usually (but not always, this makes tracking down the causes difficult!) contain a loud, inappropriate click during the transition from low to high pitch.

Attempting to render only the audio (to a .FLAC file) can cause Blender to crash before finishing, producing an incomplete audio file, cut off right before where the click would be, or it can continue, in which case it includes the click and produces a .flac file many, many times larger than it needs to be.

Exact steps for others to reproduce the error
Render the animation in this file:
ClicksTwo.blend
When I do, I get this:
Experiment_29.avi
Render the audio in the file. When I do, I get a 1.2 GB file, which, when saved in Audacity, is only 294 KB.

Notes
I have not been able to find any setting (in file export type, in audio device settings, etc.) that reliably gets rid of the clicks. The only method to do so seems to be "avoid rapid increases in pitch." Also note that while my file is at 60 fps, I have observed clicks at 24 fps, as well.
I cannot guarantee that only rapid increases in pitch cause clicks, but I have observed no other situation that does.

Pardon any errors in format or etiquette, phabricator has eaten my bug report twice now and I'm just trying to get it out!

(Please add "Audio" to project tags. I find myself unable to do anything but delete existing project tags.) **System Information** OS: Windows 7 640but, GPU: GTX 580 also OS: Windows 8.1 64-bit, GPU: FeForce CT 735M **Blender Version** Broken: As recently as BuildBot 2.71 5e3e095 to as early as official 2.65a, at least. **Short description of error** A rendered animation containing a speaker with pitch keyframed to go from very low to very high rapidly can usually (but not always, this makes tracking down the causes difficult!) contain a loud, inappropriate click during the transition from low to high pitch. Attempting to render only the audio (to a .FLAC file) can cause Blender to crash before finishing, producing an incomplete audio file, cut off right before where the click would be, or it can continue, in which case it includes the click and produces a .flac file many, many times larger than it needs to be. **Exact steps for others to reproduce the error** Render the animation in this file: [ClicksTwo.blend](https://archive.blender.org/developer/F98759/ClicksTwo.blend) When I do, I get this: [Experiment_29.avi](https://archive.blender.org/developer/F98760/Experiment_29.avi) Render the audio in the file. When I do, I get a 1.2 GB file, which, when saved in Audacity, is only 294 KB. **Notes** I have not been able to find any setting (in file export type, in audio device settings, etc.) that reliably gets rid of the clicks. The only method to do so seems to be "avoid rapid increases in pitch." Also note that while my file is at 60 fps, I have observed clicks at 24 fps, as well. I cannot guarantee that *only* rapid increases in pitch cause clicks, but I have observed no other situation that does. Pardon any errors in format or etiquette, phabricator has eaten my bug report twice now and I'm just trying to get it out!

Tom Benedett commented

2014-07-21 04:13:47 +02:00

Changed status to: 'Open'

Tom Benedett self-assigned this 2014-07-21 04:13:47 +02:00

Tom Benedett commented

2014-07-21 04:13:47 +02:00

Added subscriber: @moak

Tom Benedett removed their assignment 2014-07-21 04:14:08 +02:00

Joerg Mueller was assigned by Sergey Sharybin

2014-07-21 11:55:12 +02:00

Sergey Sharybin commented

2014-07-21 11:55:12 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-07-21 11:55:12 +02:00

Joerg, mind having a look?

Joerg Mueller commented

2014-07-21 14:30:34 +02:00

Changed status from 'Open' to: 'Resolved'

Joerg Mueller closed this issue

2014-07-21 14:30:34 +02:00

Joerg Mueller commented

2014-07-21 14:32:03 +02:00

I fixed the crash in r31e1a31feed3adbfba85ed319447fc13e9b454ee

The click comes from the sudden change of the frequency/pitch by a factor of 100 within a frame. If you want to get rid of it, you have to set the accuracy to 1 during audio export.

I fixed the crash in r31e1a31feed3adbfba85ed319447fc13e9b454ee The click comes from the sudden change of the frequency/pitch by a factor of 100 within a frame. If you want to get rid of it, you have to set the accuracy to 1 during audio export.

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Audio: Speakers with animated pitch cause clicks in rendered animations, crashes or huge filesizes in rendered audio #41133