CDDA Buffer underrun

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Fightclub
Posts: 1
Joined: May 8th, 2016, 7:45 pm

CDDA Buffer underrun

Post by Fightclub » May 8th, 2016, 8:03 pm

Hey,

after searching the web for weeks, I build my hope on you. I'm running a minimal debian jessie based on the Volumio project. I'm trying to enhance this mpd-centered system with audio cd playback. I'm already getting sound from my CD to my speakers, but the problem is - as it seems - constant buffer underrun.
Problem: After

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mpc add cdda:///1
and

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mpc play
the drive spins up and it takes around 15s before playback starts. This playback ends after 3-4s, followed by a short, ~.5s pause and after that comes stuttering like there's no tomorrow. To me this looks like it's very slow at reading the info, then plays what's in the buffer, buffer get's empty and then can't catch up. The drive is a USB CD drive, attached to my raspberry pi via powered USB hub and offers up to 24x speed. When connected to my Mac it plays flawlessly and when ripping with cdparanoia, a track of 2:20min is ripped in 1:40min so the drive should be capable of playing cdda without problems, but to me there seems to be a problem with mpd.

My version output:

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Music Player Daemon 0.19.9

Copyright (C) 2003-2007 Warren Dukes <warren.dukes@gmail.com>
Copyright (C) 2008-2014 Max Kellermann <max@duempel.org>
This is free software; see the source for copying conditions.  There is NO
warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


Database plugins:
 simple proxy upnp

Storage plugins:
 local smbclient nfs

Neighbor plugins:
 smbclient upnp

Decoders plugins:
 [mad] mp3 mp2
 [mpg123] mp3
 [vorbis] ogg oga
 [oggflac] ogg oga
 [flac] flac
 [opus] opus ogg oga
 [sndfile] wav aiff aif au snd paf iff svx sf voc w64 pvf xi htk caf sd2
 [audiofile] wav au aiff aif
 [dsdiff] dff
 [dsf] dsf
 [faad] aac
 [mpcdec] mpc
 [wavpack] wv
 [modplug] 669 amf ams dbm dfm dsm far it med mdl mod mtm mt2 okt s3m stm ult umx xm
 [mikmod] amf dsm far gdm imf it med mod mtm s3m stm stx ult uni xm
 [ffmpeg] 16sv 3g2 3gp 4xm 8svx aa3 aac ac3 afc aif aifc aiff al alaw amr anim apc ape asf atrac au aud avi avm2 avs bap bfi c93 cak cin cmv cpk daud dct divx dts dv dvd dxa eac3 film flac flc fli fll flx flv g726 gsm gxf iss m1v m2v m2t m2ts m4a m4b m4v mad mj2 mjpeg mjpg mka mkv mlp mm mmf mov mp+ mp1 mp2 mp3 mp4 mpc mpeg mpg mpga mpp mpu mve mvi mxf nc nsv nut nuv oga ogm ogv ogx oma ogg omg opus psp pva qcp qt r3d ra ram rl2 rm rmvb roq rpl rvc shn smk snd sol son spx str swf tgi tgq tgv thp ts tsp tta xa xvid uv uv2 vb vid vob voc vp6 vmd wav webm wma wmv wsaud wsvga wv wve
 [gme] ay gbs gym hes kss nsf nsfe sap spc vgm vgz
 [pcm]

Output plugins:
 shout null fifo pipe alsa roar ao openal pulse httpd

Encoder plugins:
 null vorbis opus lame wave flac

Input plugins:
 file alsa curl ffmpeg smbclient nfs mms cdio_paranoia

Playlist plugins:
 extm3u m3u pls xspf asx rss soundcloud cue embcue

Protocols:
 file:// http:// https:// mms:// mmsh:// mmst:// mmsu:// gopher:// rtp:// rtsp:// rtmp:// rtmpt:// rtmps:// smb:// nfs:// cdda:// alsa://
My config file

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# Volumio MPD Configuration File

# Files and directories #######################################################
music_directory		"/var/lib/mpd/music"
playlist_directory		"/var/lib/mpd/playlists"
db_file			"/var/lib/mpd/tag_cache"
#log_file			"/var/log/mpd/mpd.log"
pid_file			"/var/run/mpd/pid"
#state_file			"/var/lib/mpd/state"
#sticker_file                   "/var/lib/mpd/sticker.sql"
###############################################################################

# General music daemon options ################################################
user				"mpd"
group                          "audio"
bind_to_address		"any"
#port				"6600"
#log_level			"default"
#gapless_mp3_playback			"yes"
#save_absolute_paths_in_playlists	"no"
#metadata_to_use	"artist,album,title,track,name,genre,date,composer,performer,disc"
auto_update    "yes"
#auto_update_depth "3"
###############################################################################
# Symbolic link behavior ######################################################
follow_outside_symlinks	"yes"
follow_inside_symlinks		"yes"
###############################################################################
# Input #######################################################################
#
input {
        plugin "curl"
#       proxy "proxy.isp.com:8080"
#       proxy_user "user"
#       proxy_password "password"
}
input {
        plugin "cdio_paranoia"
}
###############################################################################

# Audio Output ################################################################
audio_output {
	type		"alsa"
	name		"alsa"
	device		"hw:0,0"				
}

audio_output {
    type            "fifo"
    enabled         "no"
    name            "multiroom"
    path            "/tmp/snapfifo" 
    format          "44100:16:2"
} 

samplerate_converter "soxr very high"
#replaygain			"album"
#replaygain_preamp		"0"
#volume_normalization		"yes"
###############################################################################

# MPD Internal Buffering ######################################################
audio_buffer_size		"8192"
buffer_before_play		"20%"
###############################################################################


# Resource Limitations ########################################################
#connection_timeout		"60"
max_connections			"20"
#max_playlist_length		"16384"
#max_command_list_size		"2048"
#max_output_buffer_size		"8192"
###############################################################################

# Character Encoding ##########################################################
filesystem_charset		"UTF-8"
id3v1_encoding			"UTF-8"
###############################################################################

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