Mantis307 is described as "a fat, mean, and rubbery VST synth influenced by the raucous sonic stylings of classic synths like the TB-303, MC-202, Nord 3, OSCar and Juno 60".

It features "killer" unison and distortion, as well as constant time-slide ("portamento done right"). In addition, sync, mono and polyphonic modes, keyboard tracking, and 3 envelope curve types, and much more. All with a low CPU footprint that lets you layer many mantis sounds without breaking a sweat.

Features:

• 2 oscillators per voice - Saw, Sqr, Tri, Sin, Pink/White noise.
• 1 sub-oscillator per voice for extra fat basslines.
• Hard sync, hidden sync oscillators give each main osc its own hard-sync sound.
• Trigger sync, restart each oscillator for each new note.
• Detune, with detune copy/paste quick buttons.
• Oscillator mix.
• Unison modes - mono, stereo, or chorus modes adds 1, 2, or 5x the voices.
• Unison detune, 2 different detune styles, "dirty", and "clean".
• Smart voice allocation:
  • Monophonic and polyphonic modes.
  • Aggressive constant time slide.
  • Polyphony limiter - take control over CPU usage.
  • Legato mono-mode (polyphony == 1) enables constant time slide, skips attack phase of envelope.
  • Legato poly-mode (polyphony > 1) true legato, skips attack phase of envelope.
• Envelopes:
  • 3 envelope shapes - linear + 2 different curves.
  • Amplitude ADSR.
  • Filter ADSR with Amount and Velocity sensitivity.
• Filter:
  • 4 pole Moog-style filter with cutoff and resonance, can self resonate, cutoff is envelope controlled.
  • Keyboard Tracking of the cutoff parameter (3 modes off, normal, bright).
• Distortion unit:
  • Wet/dry mix.
  • Gain.
  • 3 types, Tube, Thin, Hard-clip.
• Volume Output Level.
• Preset Manager featuring many built in presets with save/load and rename functions.
• Low CPU footprint lets you layer many mantis sounds.