Giada is a free hardcore loop player

It handles up to 12 audio channels playable in a loop mode - loop machine way - or in a single shot mode - drum machine way.
Giada aims to be a compact and portable virtual device for Linux (and maybe for Windows and Mac in the future) for production use and live sets.

Features

• Ultra-lightweight internal design
• Multi-thread/multi-core support
• 32 bit floating point audio engine
• Up to 12 audio channels controlled via computer keyboard
• Single shot mode vs. loop mode
• Bpm and beat sync
• Sample-accurate loop engine
• Patch-based system: load/save your setup from/to a binary file
• Based upon FLTK (GUI) and Alsalib (audio layer)
• 0% complexities or exotic dependencies: download the .tar file, unpack it and you're ready to rock
• 100% freeware stuff: you can use it without any limitations

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Changes in v0.95:

• Patch loading system with permanent MIDI mapping;
• Ability to clear assigned keys (keyboard mode);
• Various other minor fixes and tweaks.

Changes in v0.94:

• Drag-n-drop now works in existing channels
• Store 'resize recordings' flag in giada.conf
• Improved management of duplicate samples
• More VST debug information
• Various other minor bugfixes and tweaks

Changes in v0.93:

• GUI improvements that include resizable columns and better column handling mechanism
• Bugfix for various graphical bugs
• Upgrade to FLTK 1.3.3;
• Support for MIDI devices without Note Off message;
• Various other bugs fixed and internal enhancements.

Changes in v0.91:

• Custom version of rtAudio is back in source package
• Turn up volume automatically when adding new channel
• Misc tab in configuration panel updated
• Bugfix for missing jack headers

Changes in v0.9:

• Redesigned interface with full screen support
• Multi-column layout
• Advanced logging system
• Various other improvements and bugfixes

Changes in v0.8.4:

• New loop once bar mode
• Various other improvements and bugfixes.

Changes in v0.8.3:

• Experimental MIDI timing output with MTC and MIDI clock;
• New pitch operators x2 and /2;
• Various bugfixes and other minor improvements

Changes in v0.8.2:

• Improved VST MIDI event support;
• Pitch control exposed via MIDI;
• New tools in Sample Editor (linear fade in/out, smooth edges);
• Various bugs fixed and internal improvements.

Changes in v0.7.3:

• Piano Roll tool improvements
• Massive internal cleanup, is now ready for future development;
• Copious bugs fixed and minor improvements.

Changes in v0.7.2:

• Initial MIDI output support on multiple channels (1-16)
• Internal MIDI routing enhancements
• Other bugfixes and cleanups.

Changes in v0.7.1:

• Initial Jack Transport support
• Send global note off when sequencer is being stopped
• Send note off when deleting notes in Piano Roll
• Store position and size of Piano Roll in conf file
• Avoid overlap MIDI notes in Piano Roll
• MIDI channel refactoring
• MIDI channels now behave like loopmode ones
• Bugfix for graphical bugs in Action Editor, sample mode
• Bugfix for refresh issue in Piano Roll when deleting items
• Lots of invisible cleanups and improvements

Changes in v0.6.7:

• MIDI Development.
• VSTi (instrument) support.
• New Piano Roll widget.

Changes in v0.6.4:

• Resizable plugin parameter window
• New and standard package name format
• Implement RtAudio::getCompiledApi() to fetch compiled APIs
• Implement audioMasterGetSampleRate, audioMasterGetLanguage VST opcodes
• Add drop down menu for buffer size values in config panel
• Enhance project portability between OSes
• Lots of fixes and improvements for VST strings and parameters
• Avoid segfault when loading recs from a patch with files not found
• Always remember selected program when shifting up/down plugins
• Various bug fixes and other improvements

Changes in v0.6.3:

• Now with solo button
• Improved sharing facilities
• New 'Single Endless' channel mode for your drone music projects
• Improved GUI and other minor fixes.

Changes in v0.6.2:

• Redesigned Interface
• New volume envelope tool;
• Big enhancements in the action editor
• Zoom with mouse wheel
• Various other improvements and bugfixes

Changes in v0.6.1:

• Now supports unlimited number of channels
• Deep internal refactoring
• Mixer/GUI layers
• Always free Master In plugin stack on exit
• Bugfix for random crashes on exit
• Bugfiix for crashes when closing Giada with VST windows opened
• Various other minor bugfixes and enhancements