Cableguys’ Curve 0.5b is a free VST synthesizer for Windows that allows you to draw your own waveforms.

Description:

It has 3 oscillators (each of them can be set to either one of four user-waveforms or to sine, saw, pulse, triangle or noise) as well as two synced and two unsynced LFOs. You can set an LFO to 0.1 Hz or you can set it to several kHz. You can even set the LFO frequency to the frequency of the note you are currently playing.

Of course it has volume envelopes, filter envelopes, … in fact its envelopes can be used to modulate plenty of parameters.

Also it owns 6/12/24dB-filters with cutoff and resonance.

Curve has drawable modulation matrixes. Use an LFO to modulate the pitch or use an AHDSR-Envelope to modulate the filter cutoff and you get a nice filter envelope, ..;

You can play up to 128 notes at one time.

All parameters can be automated (except for the user-waveforms and modulation matrixes) in your sequencer (Ableton Live, Steinberg Cubase, ..).

Video by myVST