Reduced playback speed is way more distorted in lazer than in stable

[OliBomby]

Type

Game behaviour

Bug description

While mapping songs that use high bpm and complex snap divisors its very useful to listen to the song at 25% playback speed so you can count the number of notes in between the beats. I often do this in stable but in lazer the audio is way more distorted which causes the notes to melt together into indistinguishable noise. In particular you can hear the onset of the sounds way more clearly in stable.

I did this on Windows 10.

Screenshots or videos

osu._NBiPhqIvpn.mp4

osu._1QRLhOQpIR.mp4

Spectral analysis (top=lazer, bottom=stable):

Version

2024.731.0-lazer

Logs

compressed-logs.zip

[peppy]

This was brought up recently, and noted that stable has specific settings being applied to the tempo adjust filter.

That said, I just checked and the same settings are being applied in framework:

https://github.com/ppy/osu-framework/blob/ffdb229935afc7fff8ed2fc87d5d812b701e41eb/osu.Framework/Audio/Track/TrackBass.cs#L185-L187

A next step for investigation would be to remove these using a local framework checkout and see if it changes anything. @OliBomby maybe you can give that a go.