i have a problem that all my audio playback is too fast. I have found this: bbs.archlinux.org but i dont know where to disable the multirate locking and decreas the multitrack internal clock samplerate to 48000
Glitches, skips or crackling
The newer implementation of PulseAudio sound server uses a timer-based audio scheduling instead of the traditional interrupt-driven approach.
Timer-based scheduling may expose issues in some ALSA drivers. On the other hand, other drivers might be glitchy without it on, so check to see what works on your system.
To turn timer-based scheduling off add
Then restart the PulseAudio server:
Do the reverse to enable timer-based scheduling, if not already enabled by default.