REQ: Toneworks Catalyst [VST/AU]

Creative VST/AU sequencer plugin for basslines, melodies, chord progressions and arpeggios.

Catalyst is a sequencing powerhouse — designed for those times when you are stuck in a rut and need to kickstart your creative flow.

Create classical and modern synth patterns that always fit the key of your song.
Host synth plugins within Catalyst and automate parameters with dedicated step sequencers.
Discover a wealth of musical ideas that never would have surfaced in the piano roll of your DAW.

No Wrong Notes
Catalyst will only ever play notes and chords in the key you choose. Experiment freely and use the built in randomization functions knowing that what you create will never sound out of place.

You set the key in Catalyst by choosing a root note and a scale. Changing the root note will transpose your pattern up or down and changing the scale will alter the intervals between notes in the pattern.

There is no need to know music theory when you use Catalyst. No matter what you do, the results are guaranteed to be musical.

Step Sequencer
Catalyst features a monophonic step sequencer that allows you to create patterns with up to 32 steps. Each step has individual pitch, velocity and gate time controls.

The pitch slider only allows you to choose notes in the selected key. If you change the key at a later point, the notes in your sequencer pattern will automatically match the new root note and/or scale.

Individual steps can be tied together to make longer notes – or to create glides when the soft synth you use with Catalyst is set to legato mode.

The five pattern slots that can be used to store different ideas and variations. You can transpose patterns or switch between them by sending MIDI to Catalyst from your DAW. Black notes select pattern 1-5 and white keys transpose the active pattern up or down.
Harmonizer
The notes generated by the step sequencer feed into the harmonizer module, which creates full chords from single notes.

The harmonizer will only play the seven fundamental chords in the selected key. You can add 6th, 7th and 9th notes to each individual chord as desired and change the inversion to create interesting progressions and smooth chord transitions.

The harmonizer also features a selection of voicings that can be used to make your chord progressions sound more defined and coherent. The density slider lets you set the number of notes in each chord: From two note power chords to super wide pad chords with notes across several octaves.