Issue With I2S dac and Flac playback

Help and Support Help
1

Hello,
Quite new to this board, I assembled a network audio player based on a PI and a RPI dac from T Jaekel, which is working now fine, but my Flacs can be read.
The playback window on webui is counting but no sound, but a glitch in speakers when starting and nothing.
I have been using a USB 1.0 dac (good chinese indeed), and never experienced such issue.
I have a 1.3beta at the moment, and couldn’t manage to have I2S dac working on 1.2 nor 1.1.

It seems that either it provides flac directly to digital output, or the ffmpeg decoding process fails and, as there is no error issue, this case is not dealt as an error…

I saw that someone has this issue on hifiberry (I am using this driver config) but no answer on this…

2

I have to add that mp3 and aiff are working well, only flacs are a problem.

Here is some more clue:
my mpg.log:

May 22 20:26 : input: Unrecognized URI
May 22 20:26 : input: Unrecognized URI
May 22 20:26 : input: Unrecognized URI
May 22 20:26 : player: played “NAS/Other/The eagles - Hell Freezes Over/06 Hotel
California.aif”
May 22 20:26 : avahi: Service ‘volumio’ successfully established.
May 22 20:26 : alsa_mixer: Failed to read mixer for ‘Output’: no such mixer cont
rol:
May 22 20:30 : output: Failed to open mixer for ‘Output’
May 22 20:30 : player: played “NAS/Other/The eagles - Hell Freezes Over/06 Hotel
California.aif”
May 22 20:31 : output: Failed to open mixer for ‘Output’
May 22 20:31 : output: Failed to open mixer for ‘Output’
May 22 20:31 : player: played “NAS/Other/Hits/Avicii - Addicted To You.flac”
May 22 20:31 : output: Failed to open mixer for ‘Output’
May 22 20:31 : output: Failed to open mixer for ‘Output’
May 22 20:31 : output: Failed to open mixer for ‘Output’

each time I try to read a flac, I have this error.

my mpd.conf file:
follow_outside_symlinks “yes”
follow_inside_symlinks “yes”
db_file “/var/lib/mpd/tag_cache”
sticker_file “/var/lib/mpd/sticker.sql”
log_file “/var/log/mpd/mpd.log”
pid_file “/var/run/mpd/pid”
music_directory “/var/lib/mpd/music”
playlist_directory “/var/lib/mpd/playlists”
state_file “/var/lib/mpd/state”
user “mpd”
bind_to_address “any”
port “6600”
zeroconf_enabled “yes”
zeroconf_name “volumio”
samplerate_converter “Fastest Sinc Interpolator”
volume_normalization “no”
audio_buffer_size “2048”
buffer_before_play “20%”
filesystem_charset “UTF-8”
id3v1_encoding “UTF-8”
gapless_mp3_playback “yes”
auto_update “no”
group “audio”
max_connections “20”

decoder {
plugin “ffmpeg”
enabled “yes”
}

input {
plugin “curl”
}

audio_output {

             type           "alsa"
             name           "Output"
             device         "hw:0,0"
             mixer_control  ""
             mixer_device   "hw:0"
             mixer_index    "0"
             dsd_usb        "yes"

}