Reverser by jabbone: Beat Repeat That Plays Slices Backwards
Reverser is a beat repeat that plays its captured slice backwards. That single sentence covers most of what the device does, and it is also why it has stayed in circulation since December 2009. Beat repeat is a familiar effect; reversed beat repeat is a different animal, because every stutter arrives as a swell into the transient rather than a hit followed by decay. Loop a snare tail and you get a rising hiss that lands on the next downbeat. Loop a vocal phrase and you get syllables turned inside out.
Reverser by jabbone sits in the Audio Effect category, runs on Max 8 with Live 10.30 listed as its build target, and reached version 5.03 in April 2021 — a device that was maintained across more than a decade rather than posted and abandoned.
What it is doing under the hood, and why that matters
jabbone is explicit about one design decision: this is not a granular device. There is no warping. The device samples incoming audio into a buffer and plays that buffer back in reverse. If you change the tempo in Live while the effect is holding material, the pitch of the sample changes, the way a tape delay shifts when you move the delay time.
That has three practical consequences:
- Tempo automation becomes a pitch effect. A tempo ramp under a held Reverser buffer is a deliberate, usable move, not a bug to route around.
- Freely varying project tempos will drag the captured material with them. If you are working on something with live tempo changes, audition carefully.
- The sound stays coherent. Granular reversal tends to smear; buffer reversal keeps the original timbre intact, just running the other way.
If you want reversed material that stays locked to pitch through tempo moves, this is the wrong tool and you should be reaching for a warped audio clip instead. If you want the tape behaviour, that is exactly what you get.
The Keep button is the part people miss
A later update added a Keep button, which holds the sampled loop in memory even when the effect is disengaged — jabbone's phrasing is that the loop survives being un-"Wooped". The catch is stated just as plainly: to resample new material, Keep has to be off.
Read that as a performance workflow rather than a utility toggle. With Keep on, you capture a phrase once and then treat the effect switch as a throw — in, out, in again, always the same reversed fragment. With Keep off, every engagement grabs whatever is passing through at that moment, so the effect is always chasing the live signal.
The mistake is leaving Keep on, wondering why the device sounds stuck on the same half-second of hi-hat from four bars ago, and concluding the device is broken. It is doing precisely what the button says.
Three ways to put it into a session
1. Fill generator on a drum bus. Put Reverser last in the chain on a drum group, Keep off, and map the engage control to a pad or a key. Hit it for the last beat of an eight-bar phrase. Because the slice plays backwards, the repeat builds toward the bar line instead of trailing away from it, which makes it a natural transition device rather than a decoration. Short slice settings on a closed hat give you the classic rising tick; longer slices on the whole bus give you a reversed bar that arrives like a reverse-reverb swell you did not have to bounce.
2. Vocal ear candy on a return track. Send a lead vocal to a return carrying Reverser, and leave the dry track untouched. Automate the send in for one word at the end of a line. Reversed syllables placed under the next phrase read as production detail rather than as an effect, especially if you follow the return with a delay or a filter. Keep on is useful here: capture one word you like, then re-trigger it at three or four points in the arrangement so the same reversed fragment becomes a motif.
3. Live glitch layer on a loop-based set. On stage, put it on a channel carrying a loop you already play with, map the engage and slice controls to a controller, and use Keep as a hold pedal. Capture something during a busy section, un-engage, then throw it back in over a stripped-down passage where the audience has no reference for where it came from. This is the same philosophy of hands-on chance that runs through a lot of performance-first Max work — see the skinnerbox spotlight for more devices built that way.
In all three cases, try it before a reverb rather than after. Reversed slices going into a long tail sound like they were printed that way.
What 44,000 downloads and a 5/5 rating tell you
Reverser has been downloaded 44,201 times, carries a 5/5 rating, and has accumulated 41 comments. The download count puts it among the most-taken audio effects in the catalogue. The comment count matters more than the rating on its own: 41 comments over a device's lifetime usually means bug reports, feature requests and workarounds, and in this case they coincide with a version history that runs to 5.03 and an update stamped April 2021 on a device first posted in 2009. jabbone's own description invites feedback and warns that responses take a while but do arrive. That is the profile of a maintained tool.
The one number to check against your own setup is the Live version: 10.30, with Max 8. The GUI was specifically updated for Live 10 and 11 compatibility. If you are on an older Live, this is not for you.
The license is Attribution-NonCommercial-ShareAlike, which constrains how you redistribute or build on the device itself. Worth knowing if you were planning to fold it into a pack or a modified patch you hand out.
How it compares to neighbours in the category
The other heavily-downloaded devices in Audio Effect solve very different problems, which is useful context for deciding what else belongs on the same rack.
Circular Doppler by monolake is the closest in ambition and has slightly more downloads at 50,728, also at 5/5. Two virtual microphones rotate around one sound source, with Doppler delay, distance-based amplitude modulation and filtering, and the movement synced to song position so the result is fully reproducible. Where Reverser is a tape machine you interrupt by hand, Circular Doppler is a deterministic spatial process — engage it and the same automation gives the same result every pass. The two pair well: reversed slice into a rotating field.
Pitch Drop by bitbutter is the other time-and-pitch manipulator in this group, emulating a turntable platter winding down at an adjustable rate, with clicks handled. At 35,999 downloads and 4/5 it is the lower-rated of the set, but it occupies the transition slot that Reverser also competes for. Pitch Drop stops the music; Reverser keeps it moving backwards. On a build-up, choose one — stacking both usually just sounds confused.
The remaining two are not really competitors. jo.Floating Oscilloscope by jonasobermueller is signal analysis with a resizable floating window, and it is genuinely handy next to Reverser if you want to see what the buffer is grabbing. Ganz Graf Mod X by synnack is audio-reactive visuals, a modification of an older device with Max UI objects swapped for live.* ones so presets save into the Live library.
Who should skip it
Skip Reverser if you need reversed audio that holds pitch under tempo automation — the tape behaviour is explicit and there is no warping to save you. Skip it if you are running a Live version older than the listed 10.30 or do not have Max 8 available. Skip it if what you actually want is a stutter that hits on the beat and decays, because Live's own Beat Repeat already does that and Reverser's whole point is the opposite gesture.
Everyone else: it is a 44k-download, 5/5, actively-maintained free effect that does one thing well and fits in a return track. The only real learning curve is remembering what Keep is doing. Start with Keep off on a drum bus, map the engage control, and play the last beat of a phrase until the timing feels automatic. More picks in the same territory sit on the best-of lists.