Ubuntu – Routing Pulseaudio to JACK causes glitches


In these days I'm trying to play my guitar through my audio interface using guitarix and JACK and they work just fine.
The issue arrives when I also want to play spotify or youtube in the meantime. I'm trying to route Pulseaudio to jack executing these scripts after the startup on qjackctl:

pactl load-module module-jack-source;pactl load-module module-jack-sink

The connection works, but then the sound that I get from my speaker is just terrible, full of glitches and strange noises, it just isn't usable.

Am I doing something wrong? Should I tweak something? Is this setup usable for you?

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