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Universal Audio Flow is an emulation of three tube-driven tremolo effects in a compact stompbox, with a captured tube preamp behind them. Three modes cover Dharma harmonic tremolo, 65 round sine wave and Square choppier square wave, with onboard tap tempo, a Volume control and selectable true or buffered bypass.
Harmonic tremolo, which most tremolo pedals do not have.
UAFX pedals come out of the same modeling work as UA's plug-ins. The company measures specific units rather than product categories, which is why its descriptions name a particular amplifier or a particular tape machine rather than a style. The dual-engine processing in these pedals is what allows that detail to run in a stompbox rather than on a computer.
The compact UAFX pedals take one piece of hardware and model it end to end rather than offering a menu. That is a deliberate trade: fewer options, and a closer reproduction of the unit being modeled, in an enclosure that fits a crowded board.
The UAFX Control app handles what the four knobs cannot. Footswitch behavior, preset recall and archiving, additional downloadable speaker cabinets and microphones, and artist presets all live there. Current pedals support MIDI over USB along with Bluetooth and hardwired connections.
At a Glance
| Type | Tremolo pedal |
| Effects | 3 tube-driven tremolo emulations |
| Modes | Dharma harmonic, 65 sine wave, Square |
| Preamp | Captured tube preamp |
| Tap tempo | Onboard |
| Controls | Volume plus tremolo |
| Bypass | Selectable true or buffered |
What Is Harmonic Tremolo?
Rather than modulating the whole signal's volume, harmonic tremolo splits it into high and low bands and modulates them out of phase with each other. The result sounds closer to a phaser than a conventional tremolo, and it came from a small number of early 1960s amplifiers. The Dharma mode reproduces it.
What Are the Three Modes?
Dharma is the harmonic tremolo described above. 65 is a round sine wave tremolo, the smooth amp-style effect most people picture. Square is choppier, cutting the signal harder for a more rhythmic, stuttering result.
Why Does It Have Tap Tempo?
Because tremolo rate has to sit against the song. Setting it by ear against a knob drifts, and a tremolo slightly out of time with the tempo is more distracting than one that is obviously free-running.
Connections
| Inputs | 1/4 in. instrument |
| Outputs | 1/4 in., stereo |
| Bypass | Selectable true or buffered |
| Power | 9 V DC, UAFX supply |
Why Universal Audio?
Universal Audio was founded in 1958 by M.T. "Bill" Putnam, the engineer who built the first recording console with integrated equalization and effects sends, and who designed the 1176 and the 610. The company was revived in 1999 by his sons and now does two things: it still hand-builds analog hardware in California, and it licenses and models the classics from Neve, API, Manley, SSL, Lexicon, Studer, Ampex and others rather than emulating them without authorization.
Frequently Asked Questions
Is this a genuine Universal Audio product?
Yes. Victory is a veteran owned dealer in Miami and units ship new in original packaging with full manufacturer support, including software registration rights.
Is this covered by warranty?
Yes. This unit carries the full Universal Audio manufacturer warranty, registered to you as the original purchaser. Call 844-687-4208 for the current term.
Does it need a special power supply?
UAFX pedals draw more current than a typical analog pedal. UA sells the PSU-GP1-WW supply for the UAFX line and we stock it. Call 844-687-4208 to add one.
Can I save my settings?
Yes. UAFX pedals store and recall presets, and the UAFX Control app handles archiving and further preset management.
Is the bypass true or buffered?
Selectable. True bypass takes the pedal out of the signal path entirely; buffered bypass preserves reverb and delay tails when the effect is switched off.
Why Buy From Victory Musical Instruments?
Victory Musical Instruments is a pro audio and musical instrument dealer in Miami, Florida. We support churches, schools, studios and working musicians across South Florida and ship nationwide. Every unit is new in the original factory packaging with full manufacturer support. Call 844-687-4208 to check lead time, request a quote, or arrange local pickup.