xoxos has released Syng2, a voice synthesizer which uses four band-pass filters to produce formants in any spectrally rich input signal, or using an internal oscillator. The phoneme can be selected on a second MIDI channel for precise timing of speech, or preset words can be triggered on a third MIDI channel.
Syng2 was designed as an intelligible, low-CPU voice engine for Breathcube 2. The articulation is intended to be more natural than other 'robot voices' using this method, with plosives slightly emphasised to be heard with music.
Available for Windows as a VST instrument plug-in, Syng2 is priced at $25. A demo version is available which is quantised to only 4 notes per octave.