When listing audio devices:

Python 3.13.7
Qt 6.10.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 11.4.1 20231218 (Red Hat 11.4.1-3)) [Python limited API run time: 3.13.7 built: 3.9.18]
qt.multimedia.ffmpeg: Using Qt multimedia with FFmpeg version 7.1.1 LGPL version 2.1 or later
parseSampleFormat: parse error "Object: size 144, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3)" "  Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000" "    Id 1        (Spa:Enum:MediaType:audio)" "  Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000
000" "    Id 3        (Spa:Enum:MediaSubtype:iec958)" "  Prop: key Spa:Pod:Object:Param:Format:Audio:iec958Codec (65542), flags 00000000" "    Choice: type Spa:Enum:Choice:Enum, flags 00000000 24 4" "      Id 1        (Spa:Enum:AudioIEC958Codec:PCM)" "      Id 1        (Spa:Enum:AudioIEC958Codec:PCM)" "  Prop: key
Spa:Pod:Object:Param:Format:Audio:rate (65539), flags 00000000" "    Choice: type Spa:Enum:Choice:Range, flags 00000000 28 4" "      Int 48000" "      Int 32000" "      Int 48000"
outp b'alsa_output.pci-0000_07_00.1.hdmi-stereo' AD104 High Definition Audio Controller Digital Stereo (HDMI)

Disabling "AD104 High Definition Audio Controller" gets rid of the error.