Below is a quote from SONY manual, it claims to support flac files, both 16 and 24 bit from 44.1 to 192 kHz.
My files that do not play are at 16 bit and 44.1 kHz, other files from the same album, encoded using same parameters are playing with no problem , but these ones no. Initially I thought that my files are corrupt or something, but if that would be the case they would not play locally without problems, right?
DLNA section
Supported format*
MP3 (MPEG 1 Audio Layer-3):
32 kbps – 320 kbps, VBR
AAC:
16 kbps – 320 kbps, CBR, VBR
WMA9 Standard:
40 kbps – 320 kbps, CBR, VBR
WAV:
32 kHz – 192 kHz, 16 bit PCM
32 kHz – 192 kHz, 24 bit PCM
FLAC:
44.1 kHz – 192 kHz, 16 bit FLAC
44.1 kHz – 192 kHz, 24 bit FLAC
AIFF:
32 kHz – 192 kHz, 16 bit PCM
32 kHz – 192 kHz, 24 bit PCM
ALAC:
32 kHz – 96 kHz, 16 bit ALAC
32 kHz – 96 kHz, 24 bit ALAC
DSD**:
2.8 MHz, 1 bit DSD
* Compatibility with all encoding/