[Ardour-Users] blips

[karl at aspodata.se]

 Dear Sirs,
after a years hiatus, I'm running ardour again, on a new box and trying 
to read old recordings.

I have got that working, but there are periodic blips, about a second 
apart, when listening to the recording in the editor window. I don't
know how to get rid of thoose blips.

Any help would be appreciated, I really don't know what more to look
for.

//
Using mplayer, xine etc works without a problem.

//
It is not the metronome, I can click on it and it works like a metronome 
and I can turn it off.

//
Using larger latency doesn't help:
$ /usr/bin/jackd -R -dalsa -P80 -Xseq -dhw:M1010LT -D -M -H -n4 -p1024 -r48000 
jackd 0.125.0
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
apparent rate = 48000
creating alsa driver ... hw:M1010LT|hw:M1010LT|1024|4|48000|0|0|hwmon|hwmeter|-|32bit
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 4 periods
ALSA: final selected sample format for capture: 32bit integer little-endian
ALSA: use 4 periods for capture
ALSA: final selected sample format for playback: 32bit integer little-endian
ALSA: use 4 periods for playback
creating alsa_midi driver ...

//
ardour compiled from source
git clone git://git.ardour.org/ardour/ardour.git
git co 5.12
./waf configure
./waf
./waf install

 starts the program from an xterm like:
ardour5 20180325.ardour &
(now seems to be a good time to learn russian:)

//
in Session->Import I can select the 
 interchange/20180325/audiofiles/Audio-2%[LR].wav
and they sound fine there.

//
I can export a range and play it with mplayer and it sounds fine.

//
I (in qjackctrl) disconnected all connections and reconnected 
the the right playback ports, to make sure the sound isn't comming
from multiple places.
$ jack_lsp -c
...
system:playback_5
   ardour:Audio/audio_out 1
system:playback_6
   ardour:Audio/audio_out 2
...
ardour:Audio/audio_out 1
   system:playback_5
ardour:Audio/audio_out 2
   system:playback_6
...

//
Recorded at 48kHz, played at the same rate.

Regards,
/Karl Hammar