TRANSIENT Fred Anton Corvest

Emphasize or tame the transients, extend or shorten the sustain part

Download on the App Store Download on the Mac App Store
  • Design the attack and sustain stages of your instruments
  • Adjust the depths to bring them to the front or to the background of your mix
  • Fine tuning of the envelope detection circuits; time, algorithm and threshold
  • Threshold provides an accurate control of what to keep in the input detection circuit
  • Suitable for any situation: drums, guitars, bass, vocal and much more
  • Mix parameter to blend the effect into the original signal
  • Gentle soft clipper to avoid clipping in your final mix
  • AUv3 for iOS (iPad/iPhone) and macOS (sold separately)
  • On macOS, supported by: Ableton Live, Logic Pro, GarageBand, Reaper

Emphasize-tame the transients, extend-shorten the sustain part

FAC Transient as is suggested by the name is an outstanding dynamics processor providing precise design and control of the attack and sustain stages of your instruments. Transient designers or shapers are often associated with drum enhancements and only the best of them are versatile enough to suit most of the scenarios. Of course, you know that FAC takes pride in ensuring versatility in its product line, providing subtle to drastic changes. FAC Transient is no exception to the rule!

To meet this objective and to be ready for all the situations: drums, guitars, bass, vocal and much more. FAC Transient includes, in addition to the classic amplification or attenuation of the attack and sustain portion of your instrument, a fine control of the detection circuit involved in the processing.

Without going into technical details, there are three envelopes built from their respective detection circuits. The first one is the contour of the input signal, this includes similar processing available in FAC Maxima and brings you control of the threshold, time and detector algorithm. The second and third one define the contour of the attack and sustain portions and brings you a total control of the depth and duration of each stage.

FAC Transient gives you all you need to design the shape of your instruments and provides them the place they deserve in your mix. Following the diagram below, the sound flows from the left to right or from the input to the output.

  • Gain (up to 15db) Use it carefully
Main contour
  • Threshold sets the level at which the detector starts working
  • Time the detector takes to return to the detected level
  • Detector algorithm: SLOW and FAST
  • Safe: activate/deactivate the Soft Clipper
Attack Designer
  • Depth defines the amplification or attenuation of the attack portion of the signal
  • Time is the duration the attack envelope detector takes to return to the main contour
Sustain Designer
  • Depth defines the amplification or attenuation of the sustain portion of the signal
  • Time is the duration the sustain envelope detector takes to return to the main contour
  • Dry/Wet mix signal control
  • Gain (up to 15db) Use it carefully
  • Stereo input and output VU Meter
    ■■■ bigger than 0db
    ■■■ bigger than -12db
    ■■■ smaller or equal to -12db
  • Bypass

As with all FAC products the interface has a unique sober look and provides a great user experience. The value of each knob can be monitored at any time and two VU meters provide an accurate visual monitoring of the input and output signal levels. The knobs are very responsive, natural and follow a specific curve according to the parameters type.


Besides the fact that the provided presets give you a total overview of FAC Transient capabilities, most of the time start with the following step and if it's not enough go to the next one and so on.

1 Set the Init preset and tweak both attack and sustain Depth
2 Tweak both attack and sustain Duration
3 Fine tune by adusting the reset Time and Detector algorithm

The Threshold is also very important to avoid any unwanted amplification for example.


Main countour reset Time and Detector algorithm are key parameters to ensure that the quality of your signals remain high. Keep in mind that having FAST Detector algorithm and very short reset Time will lead to some artefacts in some context. They are provided to give versatility, the most secure approach is slow detection and slow reset time.

Preset Management

Transient also comes with some factory presets to provide you a source of inspiration to satisfy your needs in any situation you might require.

The preset button provides common management features: loading, organization, and saving. The left and right arrows allow fast navigation short cut among all the presets (factory + user), a short press on the center label provides a detailed list of all the available presets, select the one you want to work with. On the other hand a long press (hold) provides contextual operation. For factory presets it's possible to save the current preset to a user preset, for user presets it's possible to rename, save and delete the current preset.

Warning about the "Larsen effect" in the main iOS host app. In the input section, it's possible to choose a mic as input. This may cause audio feedback, check your levels to avoid any damage to your system. In general, use the gain and feedback in parsimony, to avoid any excessive levels that may damage your ears or your system. FAC Transient shall not be liable for any loss or damage of whatever nature (direct, indirect, consequential, or other) to your material (software, hardware, or other).

FAC Transient The Sound Test Room PreviewFAC Transient The Sound Test Room Preview FAC Transient Teaser videoFAC Transient Teaser video FAC Transient --- OSX DemoOSX Demo

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Buscrates in his studio

Check out what musicians think about FAC Transient

Review Fac Transient
on the App Store
Review Fac Transient
on the Mac App Store

I used Transient Master from NI all the time. I was pretty upset that there was not an equivalent when I switched over to iOS. Now I have FAC Transient!


Damn! This is going to be soooo useful. I just loaded up a bunch of muddy old break beat loops and proceeded to utterly kill the character and vibe of the originals, turning them into punchy, clean, mundane modern pop schmutz.


So many people have wanted a Transient Designer app for so long now and Fred has delivered one in his usual professional manner!


FAC Transient for some solid transient processing that you only thought you’d ever get on a PC. (Seriously, after adjusting volumes and EQs, transient processing is that one step that takes a good mix to GREAT!)



Fred Anton Corvest (FAC) passionately crafts each plugin as a masterpiece, merging art and technology
with a strong emphasis on both sound excellence and user experience
Download on the App Store Download on the Mac App Store