Tetra

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Tetra is a morphing synthesizer which generates a band-limited quadrature signal, i.e. a stereo signal whose harmonics differ pairwise by 90 degrees.
By morphing between two definable timbres, Tetra can create a wide range of unique sounds.

Stereo output of band-limited quadrature signals with up to 1000 harmonics.
Morphing between two timbres, controlled by an envelope.
Copy & Paste buttons for quick storing and restoring of all control settings.
Control changes may affect the sound either immediately or when the next note is played.
Text field input for all controls.
Freely selectable polyphony with up to 16 voices. Note sliding. Adjustable pitch bend range.
Envelope and key tracking controlled volume.
Freely adjustable Attack, Decay, and Release slopes.
MIDI control of all parameters (NRPN).
100 presets.