PI5 with Raspberry Pi OS (64bit) and AMP2 - audio with only half the speed

I just got my Pi 5 and installed my working AMP2 on it and read the documentation. The AMP2 works, but the playback is in slow-motion (half the speed).

My setup looks like this:

Pi5 + original Pi Fan + GPIO Extension (6.2mm from Berrybase) + Hifiberry AMP2

The config looks like this:




pcm.!default {
  type hw card 0
ctl.!default {
  type hw card 0

aplay -l

card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 [HiFiBerry DAC+ HiFi pcm512x-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

And audio-Playback:

MPlayer UNKNOWN-12 (C) 2000-2023 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing /home/pi/sound/doorbell.mp3.
libavformat version 59.27.100 (external)
Audio only file format detected.
Load subtitles in /home/pi/sound/
Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III
AUDIO: 44100 Hz, 2 ch, s16le, 40.0 kbit/2.83% (ratio: 5000->176400)
Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)
AO: [pulse] Init failed: Connection refused
Failed to initialize audio driver 'pulse'
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A:   2.0 (01.9) of 4.0 (04.0)  0.1%

Exiting... (End of file)

pigpiod is disabled as someone wrote it could mess up the audio, but was preinstalled.

Please help me, as i´m out of ideas and the Board worked flawlessly on my Pi3b a day ago.

Thank you


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