Depends on Qt 4.x
|Submitted: Apr 14 2007|
Updated: Mar 21 2014
Qtractor is an audio/MIDI multi-track sequencer application written in C++ with the Qt4 framework. Target platform is Linux, where the Jack Audio Connection Kit (JACK) for audio and the Advanced Linux Sound Architecture (ALSA) for MIDI are the main infrastructures to evolve as a fairly-featured Linux desktop audio workstation GUI, specially dedicated to the personal home-studio.
- Multi-track audio and MIDI sequencing and recording.
- Developed on pure Qt4 C++ application framework
(no Qt3 nor KDE dependencies).
- Uses JACK for audio and ALSA sequencer for MIDI
as multimedia infrastructures.
- Traditional multi-track tape recorder control paradigm.
- Audio file formats support: OGG (via libvorbis),
MP3 (via libmad, playback only), WAV, FLAC, AIFF
and many, many more (via libsndfile).
- Standard MIDI files support (format 0 and 1).
- Non-destructive, non-linear editing.
- Unlimited number of tracks per session/project.
- Unlimited number of overlapping clips per track.
- XML encoded session/project description files (SDI).
- Point-and-click, multi-select, drag-and-drop interaction
(drag, move, drop, cut, copy, paste, paste-repeat, delete, split, merge).
- Unlimited undo/redo.
- Built-in mixer and monitor controls.
- Built-in connection patchbay control and persistence
- LADSPA, DSSI, native VST and LV2 plug-ins support.
- Unlimited number of plug-ins per track or bus.
- Plug-in presets, programs and chunk/configurations support.
- Unlimited audio effect send/return inserts per track or bus.
- Audio/MIDI clip fade-in/out (linear, quadratic, cubic).
- Audio/MIDI clip gain/volume, normalize, export.
- Audio/MIDI track and plugin parameter automation (dynamic curves,
sample&hold, linear and spline modes).
- Audio clip time-stretching (WSOLA-like or via librubberband),
pitch-shifting (via librubberband ) and seamless sample-rate
conversion (via libsamplerate).
- Audio/MIDI track export (mix-down, merge).
- Audio/MIDI metronome bar/beat clicks.
- Unlimited tempo/time-signature map.
- Unlimited location/bar markers.
- MIDI clip editor (matrix/piano roll).
- MIDI instrument definitions (a-la Cakewalk(tm) (*.ins));
SoundFont (*.sf2) and MIDI Names XML (*.midnam) files also supported..
- MIDI controller mapping/learn/assignment (mixer and plug-in parameters).
- MIDI system exclusive (SysEx) setups.
- JACK transport sync master/slave.
- JACK session support.
- NSM (Non Session Management) support.
- MMC control surface enabled.
- MIDI Song Position cueing support.
- Configurable keyboard shortcuts.
0.6.0 2014-03-21 Byte Bald Beta
- New user option added: on whether to save plugins automation values with higher resolution as possible, using 14-bit NRPN: cf. View/Options.../Plugins/Experimental/High resolution plugin automation (default=off).
- Generic native plugin dialogs now shows an additional "About" last page where authorship credits are due.
- A new user preference option is now in place for whether to use desktop environment's own native file requester/browser dialogs (View/Options.../Display/Dialogs/Use native dialogs).
- A bit of slack have been introduced to put "Follow Playhead" (aka. auto-scroll view mode) on hold, while doing in-flight selection edit moves.
- Fixed some user interface related annoyances while on the MIDI Controllers mappings (ie. View/Controllers...).
- Fixed port origin on MIDI RPN/NRPN 14-bit controllers input.
- A discretionary plug-in unique identifier have been devised for when more than one from the same type are inserted on a bus or track chain, avoiding destructive clashing of automation data.
- Horizontal scrolling shift+mouse-wheel direction now reversed.
- LV2 Dyn(amic)-manifest support is now optional (default=off); cf. View/Options.../Plugins/Experimental/LV2 Dynamic Manifest support).
- The following options, although decieved on View/Options... as global configuration options, were always and still are proper session instance properties: (JACK) Transport mode, MMC mode, MMC device, MIDI SPP and MIDI Clock modes, are now shown there reflecting the current open session state.
- A couple of run-time circumventions have been hacked in, both strictly related to when NSM session management is in charge: 1) the new session template feature is disabled (was aborting initial NSM new client additions); 2) the native (as from the desktop environment eg. KDE) file browser/requester dialogs are disabled (were taking too long to list the current directory on first time invocation).
- Update current automation/curve nodes selection while changing horizontal (time axis) zoom levels.
- One liner's attempt to make it consistent behaviour on resizing and moving multiple selected notes or events while on the MIDI clip editor (aka. piano-roll; after a ticket request from Daniel MacDonald aka. danboid, thanks).
- Introducing tiny quarter-note/crotchet/seminima/beat icon on all snap-to-beat selection items get a new icon :).
- Corrected some audio buffering boundary conditions that were causing dead-loops/freezes while merging some audio clips.
- Session auto-save period was chronically reduced to one third of its user setting; non critical but fixed now.
0.5.12 2013-12-31 Mike November
- Fixed another off-by-one MIDI plugin chain timing bug, delaying the actual playback of the first MIDI event, whenever it started at the same and as long as the initial play-head position (after another ticket by Holger Marzen, thanks again).
- A new LV2 host convention is in effect on plugins that expose multiple AtomPort's in either direction: only the first input or output declared AtomPort is eligible to convey regular MIDI data events (introduced while trying Frank Kober's forthcoming QmidiArp LV2 suite of plugins,thanks).
- Zooming with shift/ctrl+mouse-wheel and pointing over the main tracks view or MIDI clip editor time ruler header's now fixed.
- A rare freezing loop condition has been fixed on the oldest of MIDI file save/write routines (after a ticket and solution by Tuomas Airaksinen, thanks again).
- Copy/paste now preserving clip names (ticket by Holger Marzen, thanks).
- Scaling of whole tempo map with a given factor has been added, through a spin-box and button in Tempo Map / Markers dialog, after a long overdue patch by Tuomas Airaksinen, thanks again.
- When issued from main tracks view (ie. Clip/Tools menu) MIDI clip tools are now a bit more crash-resilient re. undo/redo-ability.
- Session auto-save / crash-recovery support is now on trial as in View/Options.../General/Session/Auto-save current working session every 10 minutes (default on).
- Plugin-list chain context-menu now includes MIDI instrument audio output options to existing non-dedicated output buses, any other than the previous hard-wired default (eg. Master).
- Tracks export now allows for the mix-down/merge of multiple audio/MIDI output buses (Track/Export Tracks).
- When adding new tracks, try preserving the last selected bus names, while not the default Master ones (after a suggestion from danboid aka. Daniel MacDonald, thanks).
- More preparations for Qt5 configure build.
- Brand new thumb-(over)view toolbar widget added to MIDI clip editor window (aka. piano-roll overview).
- General MIDI RPN/NRPN 14-bit controller support is now being introduced on real-time MIDI input parsing, on standard MIDI file I/O, on MIDI Controller options and, of course, on MIDI clip and event list editor.
- Pretty innocent nitpick on most thread cleanup routines.
0.5.11 2013-10-07 The Lima Oscar
0.5.10 2013-07-18 The Kilo Papa
0.5.9 2013-06-06 The Juliet Quebec
0.5.8 2013-03-19 The India Romeo
0.5.7 2012-12-27 The Hotel Sierra
0.5.6 2012-10-02 The Golf Tango
0.5.5 2012-06-15 The Foxtrot Uniform
0.5.4 2012-03-01 The Echo Victor
0.5.3 2011-12-28 The Delta Whisky
0.5.2 2011-12-16 The Charlie X-ray
0.5.1 2011-10-05 The Bravo Yankee
0.5.0 2011-07-22 The Alpha Zulu (TYOQA)