>> Troublemaker requires iPad 4/Mini 2/iPhone 5S/iPod Touch 6 or higher <<

Featured in the US Appstore! Here's what the reviews say:

"Perfect for on the move acid sessions, the Trouble Maker app faithfully recreates the sound of the original TB-303" - DJ Mag

"Troublemaker is absolutely no trouble at all to heartily recommend" - SoundOnSound

"If you want to make the bassline from Josh Wink’s ‘Higher State of Consciousness’ on the bus, this is the app for the job" -

"Top-notch stuff from a developer that just keeps getting better" -

"This app has been consuming all of my time this week! Love it!" -

Introducing Troublemaker: this is not a 303

The legendary TB-303 has magical properties; it is filled to the brim with analog shimmer. Its output jack is a gateway to a parallel universe and when you twiddle the filter knobs an army of highly trained pixies chisel the square waves from freshly harvested unicorn souls. So if you want a TB-303, you should buy a TB-303. But if you're after *that sound* Troublemaker will give you everything you need in spades.

Troublemaker sports a carefully crafted diode filter emulation and among the available oscillators are the typical raspy, nasal sawtooth and rubbery squarewave with its oddball shape and shifting pulsewidth.

It also has the wow.

Troublemaker is fully Audio Unit (AUv3) compatible, so you can go wild running multiple instances in your favorite DAWs.

It also has:
- Ableton Link synchronization,
- MIDI CC controllers for all knobs (predefined),
- Core Midi, Virtual Midi, Bluetooth Midi input,
- MIDI Clock Sync, MIDI Start / Stop support
- Realtime Mutation Probability Engine
- Standalone sequencer supports 1-64 steps
- Audiobus 3 support (audio + MIDI)
- Exports MID and WAV files from the standalone sequencer
- User manual and MIDI charts on

And unlike the TB-303, it can actually sound like a bass guitar ;-)

What's New

Version 1.5.3

Added a protection against possible "infinitely-decaying-slide" phenomenon when the synth does not receive a note-off during a sliding note. After 12 consecutive slides or reaching near-silence while sliding, the synth engine will assume something is wrong and reset the amp section for the next note.

Ratings and Reviews

4.7 out of 5
20 Ratings
20 Ratings
Mark Thomas Walker

Active and Responsive Developer, Great Sounds, AUv3 what more could you want!

I own every product from this developer. I am in support of developers embracing the AUv3 standard, especially when it sounds this good. Lots of consistency and simple, but powerful control options. Lots of constant updates with new features. Highly recommended.

Conrad Keely

Yeah this sh** be awesome

Two minutes with Troublemaker had me headbanging to my internal DJ and dancing at my own private rave. Love it, can’t wait to use it in my live set next week at the music convention. Looking forward to seeing how well it syncs up to some beat machines, but as it stands on its own, very fun indeed.


Rarely does something merit the hyperbole & hype that it gets, Troublemaker deserves it all

Bram Bos is a class act who is friendly to the iOS music production community and always fixes any issues with his apps. When it was revealed his latest in the "maker" series of AUv3 primed soft synth apps was going to be a bass machine the buzz was instant, then beta users started putting it over & the first few videos showed up.

Of course the 303 comparison was the easiest to make but I was more impressed with the genius note input system he came up with, showing that the skeuomorphic mimicking of hardware down to the last detail isn't always the best way of doing things. I am more a pop/rock/indie guitarist than EDM guy but I love all types of instruments, keys, sounds, etc. I got the app during the 3/03 sale and have been awed by its sound and versatility.

The 'bass guitar' wave tone is completely usable but the other waves & especially the fine tune controls for shaping are just crazy. All manner of burps, bloots, fizzles, rumbles, reso stomps and wooly bass tones can be copped quite easily. I am seriously impressed and thank Bram for the sale. I hope others on the fence realize that on sale or not, this is an incredible app. Highly recommend.


Bram Bos
6.2 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2017 Bram Bos


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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