midi

Hydrogen is a pattern-based drum sequencer. It allows you to create patterns and then sequence them into songs. Drum instruments are tweakable and hydrogen allows for up to 16 layers of velocity per drum instrument. Furthermore, Hydrogen includes a mixer and has support for LADSPA plugins. It can be used in sync with other programs. You can also export your songs on a per instrument basis if you prefer to process them in another program.

Synthclone is a tool that allows you to create sample-based instruments. You can create sample-based instruments by sending MIDI messages to your MIDI-capable gear or software that instructs an instrument to emit sounds for a series of notes, velocities, controls, and aftertouch values, or by recording your own samples. After the sampling is done, you can apply effects to your samples, and finally save this data as a sample-based instrument that can be loaded by sampler software.

Midisnoop is a simple MIDI monitor and prober. You can use it to monitor a MIDI device and/or software, and to send MIDI messages to a MIDI port to see how the device/software responds. Midisnoop supports both ALSA and JACK MIDI ports.

VMPK, or Virtual Piano Keyboard, is a MIDI events generator, and reciever, that allows you to play MIDI notes with your keyboard or mouse. You can also create, unlimited, custom controls to send out and recieve MIDI data. This can be useful if you want to control hardware parameters, via MIDI, from your computer.

Calf plugins are a complete plugin suite, in the LV2 plugin format, that cover all your basic processing needs. From processors like EQ's and compressors to effects like reverb and delay, it covers all you need to get mixing. It also includes a number of virtual instruments. The suite currently consists of 45 plugins.

LMMS (Linux MultiMedia Studio) is a MIDI sequencer, aimed at producing electronic music. It comes with it's own built in virtual instruments but also has support for third party plugins.

Carla is a plugin host that has extensive support for plugin formats. It can be used as a standalone program for live use but can also be incoporated into modular recording set ups, and includes a built in graphical patchbay . As well as plugins, Carla can also load up GIG, SF2 and SFZ sample packs.

Patchage is a popular graphical audio and MIDI connection manager. It allows you to visually see, and manage, all your connections on a canvas area.

Qjackctl is a GUI frontend for JACK that allows you to access and manage many of JACK's features. It allows you to choose your interface, settings, make connections, etc. It is very popular and is also the most fully featured front end for JACK.