Godot UI freezes while generating speech

[nightblade9]

Godot version

4.0.0 official binaries, .NET flavour.

System information

Manjaro (Arch) with KDE Plasma; GPU = NVIDIA Corporation TU117M [GeForce GTX 1650 Ti Mobile] (rev a1)

Issue description

When generating speech via DisplayServer.tts_speak, on my Linux box, there's roughly a two-second pause (irrespective of audio length) while the system libraries do their thing. During this time, the Godot UI is completely frozen.

As I would like to allow users to rapidly move from, say, menu button to menu button, I really need:

• The TTS not to freeze the Godot UI
• .stop() immediately stopping, even if it's during this two-second period.

I tried work-around (e.g. running this in a Thread.new()) but it seems to have no effect.

Steps to reproduce

• Create a button that calls DisplayServer.tts_speak with a message (maybe longer is better for testing) on press
• Update things in _process like a label with the current time
• Add extra controls you can click on
• Click the button and try to do anything. You can't.

Minimal reproduction project

Not necessary, as this is trivially reproducible.

[btzr-io]

I can confirm this issue also exists on windows 10 ( Godot v4.0.1 )

[novalis]

Could this be #77754? (I know it's probably not that for Windows, but for Linux). time spd-say -L > /dev/null will give you a hint: if it takes about 2 seconds, that's your bug. If not, then it's something else.

[nightblade9]

time reports 0.016s total, so I guess it's not the same issue. Thanks for providing clear instructions on how to verify it.