Bug#625798: qtractor: Track names with slashes cause MIDI recording to silently fail
drake at begriffli.ch
Fri May 6 00:54:33 UTC 2011
(This arguably causes data loss.)
1. Start up Qtractor. Connect a MIDI source to its Master bus using
the ALSA sequencer.
2. Create a new MIDI track named "Foo / Bar", assigned to channel 1.
3. Arm the track for recording, then enable the master record arm
with the red record button. Create a new session of any unused
name when/if so prompted.
4. Start the transport using the play button. Play MIDI notes on channel
1. They will appear in the timeline as they are purportedly recorded.
5. Stop the transport using the play button again. The MIDI clip that
has just been recorded now contains no visible events.
6. Double-click on the clip to open it in the clip editor to confirm
that there are no events. (It additionally has no apparent name
and shows up with the name of the session's containing directory,
which are less serious anomalies.)
Observe that a track named "Foo ; Bar" (with a semicolon instead of a
slash) does not experience the same behavior.
My wild guess is that since the track name is used as part of the name
of the backing store MIDI file, the slash isn't getting denatured from
its role as a directory separator, so creating the backing file fails
due to a bogus nonexistent path component, destroying the recorded
data. (At least, I haven't found any obvious way of getting it back.
Fortunately I was able to record it again after figuring out what was
---> Drake Wilson
-- System Information:
Debian Release: wheezy/sid
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages qtractor depends on:
ii jackd 5 JACK Audio Connection Kit (default
ii libasound2 1.0.23-3 shared library for ALSA applicatio
ii libc6 2.13-2 Embedded GNU C Library: Shared lib
ii libgcc1 1:4.6.0-6 GCC support library
ii libjack0 [libjack-0. 1:0.120.1+svn4142-1 JACK Audio Connection Kit (librari
ii liblo7 0.26~repack-7 Lightweight OSC library
ii libmad0 0.15.1b-6 MPEG audio decoder library
ii libogg0 1.2.0~dfsg-1 Ogg bitstream library
ii libqt4-xml 4:4.7.2-4 Qt 4 XML module
ii libqtcore4 4:4.7.2-4 Qt 4 core module
ii libqtgui4 4:4.7.2-4 Qt 4 GUI module
ii librdf0 1.0.13-2 Redland Resource Description Frame
ii librubberband2 1.3-1.1+b1 an audio time-stretching and pitch
ii libsamplerate0 0.1.7-3 Audio sample rate conversion libra
ii libslv2-9 0.6.6-9 A library for simple use of LV2 pl
ii libsndfile1 1.0.24-1 Library for reading/writing audio
ii libstdc++6 4.6.0-6 The GNU Standard C++ Library v3
ii libvorbis0a 1.3.2-1 The Vorbis General Audio Compressi
ii libvorbisenc2 1.3.2-1 The Vorbis General Audio Compressi
ii libvorbisfile3 1.3.2-1 The Vorbis General Audio Compressi
ii libx11-6 2:1.4.3-1 X11 client-side library
ii zlib1g 1:220.127.116.11.dfsg-3 compression library - runtime
qtractor recommends no packages.
qtractor suggests no packages.
-- no debconf information
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