Bug 508302 - Playback speed now alters pitch
Summary: Playback speed now alters pitch
Status: REPORTED
Alias: None
Product: kasts
Classification: Applications
Component: general (other bugs)
Version First Reported In: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: bart
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-08-15 17:29 UTC by LQPWmmcPnxThQx3r
Modified: 2025-08-15 17:48 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


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Description LQPWmmcPnxThQx3r 2025-08-15 17:29:33 UTC
SUMMARY
In v25.08.0, changing the playback speed now alters the pitch, which changes the audio to sound like a chimpmunk when sped up. This was not the case before, as it simply sped up the audio without adjusting pitch.


STEPS TO REPRODUCE
1. Install version 25.08.0
2. Play any podcast.
3. Change the playback speed.

OBSERVED RESULT
Changing playback speed now alters pitch.

EXPECTED RESULT
Changing playback speed should not alter pitch, only speed up the audio.
Comment 1 KDE User 2025-08-15 17:39:34 UTC
(In reply to LQPWmmcPnxThQx3r from comment #0)
> SUMMARY
> In v25.08.0, changing the playback speed now alters the pitch, which changes
> the audio to sound like a chimpmunk when sped up. This was not the case
> before, as it simply sped up the audio without adjusting pitch.
> 
> 
> STEPS TO REPRODUCE
> 1. Install version 25.08.0
> 2. Play any podcast.
> 3. Change the playback speed.
> 
> OBSERVED RESULT
> Changing playback speed now alters pitch.
> 
> EXPECTED RESULT
> Changing playback speed should not alter pitch, only speed up the audio.

This happens with the Qt Multimedia backend. However, it sounds fine with the VLC backend. You can try changing the backend in the settings page.
Comment 2 LQPWmmcPnxThQx3r 2025-08-15 17:48:01 UTC
(In reply to KDE User from comment #1)
> (In reply to LQPWmmcPnxThQx3r from comment #0)
> > SUMMARY
> > In v25.08.0, changing the playback speed now alters the pitch, which changes
> > the audio to sound like a chimpmunk when sped up. This was not the case
> > before, as it simply sped up the audio without adjusting pitch.
> > 
> > 
> > STEPS TO REPRODUCE
> > 1. Install version 25.08.0
> > 2. Play any podcast.
> > 3. Change the playback speed.
> > 
> > OBSERVED RESULT
> > Changing playback speed now alters pitch.
> > 
> > EXPECTED RESULT
> > Changing playback speed should not alter pitch, only speed up the audio.
> 
> This happens with the Qt Multimedia backend. However, it sounds fine with
> the VLC backend. You can try changing the backend in the settings page.

That worked! I have no idea how that changed (or if I may have accidentally toggled it somehow). Thank you!