Orpheus is a rather neat virtual string machine, totally worth checking out if you’re into synthesizers of this type. B.Serrano’s latest freeware creation features two generators, each with four different sound types (three string types + organ) and a set of ADSR envelopes, tone, level and pan controls, pitch drift controls and unison voice count setting. The instrument can also operate in monophonic mode with portamento, which is quite unusual for a string machine.

Orpheus v2. This new release adds many new features:
2 Ensembles.
128 voices polyphonic.
Unison.
Drifting effect.
Auto Bend.
Mono mode with portamento.
Vibrato.
Formants.
3 bands resonators.
Chorus.
Delay.
Phaser.
Reverb.
Auto-Pan.
Tremolo.
Mod Matrix.
Embedded patch management.

http://bserrano.free.fr/Synths_Orpheus2.html