Warbler

Warbler is a highly versatile software that offers a range of vibrato effects with additional controls that allow users to create chorus/flange/delay type effects, as well as unusual hybrid sounds that defy categorization. Whether you want subtle modulations or extreme pitch effects, Warbler has got you covered.

Thanks to its vibrato LFO, which can be set from 0Hz to 5kHz, users have total control over their sound, with the ability to accurately adjust the vibrato depth using three knobs. Additionally, the LFO shape can be selected from a variety of options and smoothly changed between them. If you want further modulation, two extra LFOs can be used to modulate the LFO speed and vibrato depth.

To help fine-tune the effect, Warbler provides a 'bias' control, so users can change the effect from simple vibrato to something more like a traditional chorus or flange. In addition, feedback can be applied to create deeper, more resonant flanges, as well as to produce echo effects.

The plug-in works as a generic n-to-n processor, meaning it can handle mono-to-mono, stereo-to-stereo, 5-to-5, and other similar conversions. Good hosts will also allow its use as a mono-to-stereo effect (e.g. Logic does this). With a 'spread' control that provides offset LFO phase per channel, users can achieve a classic 'stereo chorus' effect without any hassle.

Overall, Warbler is an excellent software for anyone looking to experiment with different vibrato effects, including chorus, flange, and delay. Its versatility and accurate control make it a must-have for any serious musician or producer.