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DAC+ ADC Pro - no sound when recording at 44.1kHz

hi,

recording at 44.1kHz fails:

arecord -f cd -d 5 test.wav

results in a 5sec 44.1kHz wav file with no sound, i.e. flat, zero amplitude

arecord -f dat -d 5 test.wav

just works fine, i.e. 5sec of 48kHz wav

I'm new to Hifiberrys, am I missing something which should be obvious? Onboard sound is disabled and the ADC Pro is the only sound card on the system.

Hardware: Pi2, DAC+ ADC Pro
OS/Kernel: raspbian / Debian buster 10, Linux raspi2 5.10.17-v7+ #1403 SMP Mon Feb 22 11:29:51 GMT 2021 armv7l GNU/Linux

Thx for a hint!

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