Qtractor is an Audio/MIDI multi-track sequencer application written in C++ around the Qt4 toolkit.
The Jack Audio Connection Kit (JACK) for audio, and the Advanced LinuxSound Architecture (ALSA) for MIDI, are the main infrastructures to evolve as a fairly-featured Linux Desktop Audio Workstation GUI, especially dedicated to the personal home-studio.
Qtractor is a nondestructive sequencer and arranger. It does not affect, alter or modify in any way, the audio and/or MIDI files that are displayed as Clip Objects. What is destructive are files resulting from capture and recording operations, and explicit changes made through specialized Clip editing (e.g., MIDI Editor).
Qtractor is a fairly massive multithreaded application. For instance, each audio clip has a dedicated disk I/O executive thread, which synchronizes with the master engine and, for all purposes, to central JACK realtime audio processing cycle, through a lockfree ringbuffer.
- Multi-track audio and MIDI sequencing and recording.
- Supports all sample rates only restricted by hardware.
- Supports multiple audio file formats, both compressed and uncompressed, including older formats such as 8SVX and .iff.
- Clip editing and automatic or manual Time Stretching abilities.
- Supports most major audio and MIDI file formats and most Linux plugin technologies.
- Clips, may be easily edited by simply dragging the left or right edges for cropping, or even for timeshifting, by using the shift key modifier.
- Use in an audio mastering environment. Its integration with JACK makes it possible to use mastering tools such as JAMin to process the audio data.
- Both an audio and MIDI metronome with user selectable audio samples.
- Easily move and copy plugins (with params) among tracks.
- Keyboard commands (hotkeys) are entirely customizable.
- Audition audio files within the Files dialog.
- Built-in Qjackctl Connections dialog.
- Support for Cakewalk instrument definition files.
- MIDI editor.
- Audio / MIDI export.
- Audio file formats support: OGG, MP3 (via libmad, playback only), WAV, FLAC, AIFF and many more.
- LADSPA, DSSI, native VST and LV2 plug-ins support.
- DSSI and Native VST Plugin Support.
- Snap/Zoom Menu Accessibility.
- OSC or D-BUS interface.
- Unlimited undo/redo.
- Configurable keyboard shortcuts.
Support: GitHub Code Repository
Developer: Rui Nuno Capela
License: GNU GPL v2
Qtractor is written in C++. Learn C++ with our recommended free books and free tutorials.
Return to Make Music Home Page | Return to Digital Audio Workstations Home Page
|The largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions.|
|Hundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.|
|Replace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS.|
|Machine Learning explores practical applications of machine learning and deep learning from a Linux perspective. This is a new series.|
|New to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.|
|Alternatives to popular CLI tools showcases essential tools that are modern replacements for core Linux utilities.|
|Essential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.|
|Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.|
|Surveys popular streaming services from a Linux perspective: Amazon Music Unlimited, Myuzi, Spotify, Deezer, Tidal.|
|Saving Money with Linux looks at how you can reduce your energy bills running Linux.|
|Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.|
|Now and Then examines how promising open source software fared over the years. It can be a bumpy ride.|
|Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.|
|Linux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.|
|Getting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.|
|Best Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.|
|These best free books accelerate your learning of every programming language. Learn a new language today!|
|These free tutorials offer the perfect tonic to our free programming books series.|
|Linux Around The World showcases usergroups that are relevant to Linux enthusiasts.|
|Stars and Stripes is an occasional series looking at the impact of Linux in the USA.|