Radium is a free music and notation editor with its own unique interface.

It is based on tracker software but has more features and fewer limitations. It also utilizes graphics to show musical data.

Features:

• Sound effects automation
• Tempo automation
• Velocity automation
• Polyphonic tracks
• Unlimited number of tracks.
• Unlimited number of lines.
• Unlimited note, tempo, and effect precision.
• Undo/Redo
• Zoom in/out.
• Import standard midi files and MMD2/MMD3 modules
• Note sequence effects such as transpose, quantitize, glizzando, invert and reverse.
• Support for Jack MIDI and ALSA MIDI. (Both at the same time.)
• Configurable key bindings, menues, fonts, and colors.
• Extension language support. Write programs that generates music or modifies your songs.
• Western style scores can be generated from radium songs with Common Music Notation (CMN).

Notable Changes in v 1.9.29:

• Revert back to faust's denormal handling.
• Bugfix for crash on CPUs without sse2.
• Bugfix for vst plugin memory corruption
• System compressor
• Compressor and equalizer GUI can be shown/hidden.
• Various other bugfixes

Notable Changes in v 1.9.27:

• Write settings to disk when selecting Set Default Editor Font
• Dont crash when using MIDI menu unless the current instrument is a midi instrument
• Workaround for bug in newer versions of libbfd, causing compilation to fail. Patch from James Morris
• Wait to handle events until program has started. Hopefully fixes a crash reported
• Remove check for jack in rt midi in check_install script.

Notable Changes in v 1.9.22:

• Can now be used as MIDI Sampler for one instrument
• Removed limitation on track deletion
• Crashreporter
• Menu option to GFX message
• Various Bugfixes
• Other enhancements and improvements

Notable Changes in v 1.9.14:

• Various graphical improvements
• Various control changes and improvements
• Various Bugfixes
• Other enhancements and improvements

Notable Changes in v 1.9.6:

• Sample change undone
• Better texts
• Configurable MIDI input port
• Upgrade bdw-gc to 7.2d
• Menu improvements and clean ups.
• Radium window icon
• Various other bugfixes and enhancements

Changes in v 0.67.1:

• Ported GUI to Qt4
• Ported Editor to GTK2.
• More colorful default colors
• Various build fixes
• Compiles under MinGW.
• RELEASE buildtype.
• Fix nodeline selection
• Antialiased lines
• Adjusted tempo colors
• Fix race condition for midi input
• Midi input editing.
• Removed the custom resize window box.
• midi: increased latency from 1.95ms to 5ms.
• Various bug fixes and improvements