Songbird is a modulated vowel/formant filter. Select two vowels and then modulate between them using either the manual slider, LFO, or envelope follower.

There are five vowel sounds and two modulation modes available to choose from. The "freq" modulation mode allows you to modulate a single filter between the two vowels chosen, to create a powerful vocal sound. The "blend" mode provides a more subtle effect, modulating the mix between two parallel filters.

Songbird is ideal for creating both vocal bass sounds and subtle filter sweeps.

Install instructions and plugins for all supported platforms are included in the download.

Source code is available at: https://github.com/jd-13/Songbird-Formant-Filter