Changing settings makes Mixxx unusable

[mixxxbot]

Reported by: uklotzde
Date: 2021-10-14T20:56:41Z
Status: New
Importance: High
Launchpad Issue: lp1947201

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This happens on main.

When changing any settings in the preferences dialog while tracks are playing and applying the changes Mixxx resets certain configurations to defaults and becomes unusable.

• The Moog filter settings are reset to defaults as already reported on Zulip.
• The tempo goes nuts, i.e. is raised by an unknown amount. This happens while playing a track when closing the dialog.

A restart is required to resolve the pitch/tempo issues. It happened with the JACK API, I need to repeat the test with ALSA.

Soundtouch v2.3.1 was used for time stretching at 0 pitch.

[mixxxbot]

Commented by: Be-ing
Date: 2021-10-14T22:56:17Z

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Are you using Rubberband or SoundTouch? Can you post a screenshot of your Decks settings? Maybe that issue is specific to one of the keylock/pitchshift options.

[mixxxbot]

Commented by: Be-ing
Date: 2021-10-14T23:05:23Z

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The Moog filter settings are reset to defaults as already reported on Zulip.

This is due to the hacky way LV2 effect parameter hiding is implemented. Unfixable without a complete rewrite of the effects system which has already been done #2618

[daschuer]

@uklotzde can you confirm that this issue is completed in main?`

[uklotzde]

Didn't notice this anymore lately 🤷

[ronso0]

So we can consider this fixed by #4467

Reopen if it occurs again.