Whirl is a barber-pole phaser.

It is based on a Bode frequency shifter model with a feedback line, an algorithm which creates unique spectrum peaks and notches that move upwards or downwards in a seemingly endless fashion – with one spectrum sweep smoothly morphing into the next one, like an audible illusion.

Whirl features up to three fully synchronized barber-pole phaser stages: this allows you to control how gentle or dramatic the effect is.

At its most extreme settings, Whirl is capable of deeply resonant filtering: it almost individually suppresses and accentuates different frequency harmonics.

By design, the spectrum sweep frequency is bipolar – and can go from downwards to upwards motion and back completely seamlessly.

SOUND ENGINE

• Barber-pole phaser based on Bode frequency shifter, with up to three sequential stages and progressive feedback
• Variable stereo phase offset
• Lag filters on all continuous parameters for smooth, click-free adjustment
• Supports mono › mono, mono › stereo, and stereo › stereo channel configurations

GRAPHIC INTERFACE

• Color-coded graphic elements
• Consistent name, mapping, value, and unit implemented for all parameters in both graphic user interface and host control/automation
• Built-in preset management functions
• Supports window size scaling up to 200%

New in Version 2.10

• Added ability to set the barber-pole phaser frequency as a host tempo fraction (adjustable from 1/16th note to 16 bars), with phase motion also synchronized to the transport location
• Extended the Stereo parameter range into the negative values to allow the relative phaser motion in the right channel to supersede the left channel – and vice versa
• New, more modern and future-proof preset manager backend
• Built against the newer JUCE 7 framework