Strange Sound with squeezelite and Hifiberry DAC+ on RasPI 4

Hi all,

I installed Squeezeboxserver and Squeezelite on my Raspberry Pi 4. It worked all. I use a HifiBerry DAC+ but if I will use it with squeezelite I get problems. Sometimes I get it working but always it will not working anymore after a reboot.

It is always working if I uese the Headphone Jack from the RP.

The HifiBerry should be installed correctly because if I play a Song with mplayer it is working with the HifiBerry. But not with squeezelite.

I installed squeezelite from here: sourceforge.net/projects/lmsclients Version: Squeezelite v1.9.9-1364

I tried all different devices which I get if I run squeezelite -l.
I tried different settings for -a

Maybe someone knows more? Thanks for your help!

Cheers Jonas

Infos:
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 [HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0

squeezelite -l
Output devices:
null - Discard all samples (playback) or generate zero samples (capture)
jack - JACK Audio Connection Kit
pulse - PulseAudio Sound Server
default
sysdefault:CARD=sndrpihifiberry - snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 - Default Audio Device
dmix:CARD=sndrpihifiberry,DEV=0 - snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 - Direct sample mixing device
dsnoop:CARD=sndrpihifiberry,DEV=0 - snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 - Direct sample snooping device
hw:CARD=sndrpihifiberry,DEV=0 - snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 - Direct hardware device without any conversions
plughw:CARD=sndrpihifiberry,DEV=0 - snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 - Hardware device with all software conversions
usbstream:CARD=sndrpihifiberry - snd_rpi_hifiberry_dacplus - USB Stream Output