Three of History's Most Mind-Expanding Modulators, Perfectly Captured in a Stompbox.

Engineered and developed by the acclaimed team at Universal Audio, the UAFX Astra Modulation Machine boasts powerful dual-processor architecture for the most sonically authentic classic Chorus, Vibrato, Flanger, and Tremolo effects ever available in a stompbox.

From spacey studio flanger tones of the 1970’s, to gritty bucket-brigade chorus and luscious opto tube tremolo, Astra Modulation Machine puts three iconic vintage effects at your feet, in a beautifully-crafted pedal that’s built to last decades.

Three Timeless Modulation Effects

Chorus Brigade: Classic ‘70s analog bucket brigade chorus with additional Vibrato mode.

Flanger/DBLR: Studio flanger/doubler tones modeling legendary rack effects units.

Trem 65: Perfectly-emulated opto tube tremolo derived from iconic blackface amps of the mid-1960’s.

Bonus Effects: Free Phaser X90 and Dharma Trem 61, downloadable at registration.

NEW! UAFX Control mobile app for all pedals is out! It lets you change bypass and footswitch behavior and runs on iPhone and Android: https://www.uaudio.com/uafx/start