# Troublemaker — Acid Bassline Synth

> Emulates the legendary TB-303 bassline synthesizer with advanced features. (iPhone/iPad app by Bram Bos.)

- Source: https://appshunter.io/ios/app/troublemaker/id1180892130 (this page in markdown: same URL + `.md`)
- Developer: [Bram Bos](https://appshunter.io/developer/325340444)
- Category: Music, Entertainment
- Price: $8.99
- Rating: 4.60/5 from 64 App Store ratings · 95 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 4 MB
- Languages: American English
- Released: 2017-01-09
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/troublemaker/id1180892130/reviews.md

## What is Troublemaker?

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" - Factmag.com

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

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

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 square wave with its oddball shape and shifting pulse width. 

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:
-  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 ruismaker.com
- Comes with an extra AUv3 plugin version of a modded Troublemaker unit

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

## Key features

- Diode filter emulation
- Sawtooth and square wave oscillators
- Realtime Mutation Probability Engine
- Standalone sequencer (1-64 steps)
- Audio Unit (AUv3) compatibility
- MIDI CC controllers
- MIDI Clock Sync

## Recent user reviews (10 of 95)

All indexed reviews: https://appshunter.io/ios/app/troublemaker/id1180892130/reviews.md

### 1/5 — Ironic name

*2026-07-20*

You’re gonna have a lot of trouble making music because this doesn’t work in other apps and it doesn’t make much sense to begin with

### 1/5 — 話にならない

*2025-11-19*

音程が3音ほど低く出力されるようになっており、全く使い物にならなかった

### 5/5 — Coole App!

*2024-08-26*

Mit wirklich starkem 303 Sound und sehr leicht zu bedienendem innovativen Sequencer. (Wesentlich besser als beim 303 Original). Schade ist nur, dass man diesen Sequencer nur Standalone benutzen kann und zum Beispiel nicht innerhalb von AUM und zusammen unserem Drum Sequencer OCTACHRON, was ich natürlich gerne mache. Dazu braucht man dann noch die Rozeta Suite, was bei diesen sehr moderaten Preisen allerdings auch noch okay ist.

### 3/5 — Sequencer en modo AUv3?

*2023-12-26, version 1.8.5*

No entiendo por qué solo esta disponible el secuenciador en modo standalone le resta versatilidad y su principal encanto

### 4/5 — 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨

*2023-12-18*

Can you Please add the dark gray theme.. it’s too bright

### 5/5 — I love this but…

*2023-08-30*

I absolutely LOVE this app.
It’s utterly brilliant.
But I cannot figure out how to use it as an auv3 in GarageBand or logic pro. It just doesn’t seem to to have the same functionality, and is a stripped down version with a piano keyboard rather than the grid based system in the standalone version.
So I have to export midi files from the standalone and import them from my files app into my DAW.
And then place them into a Troublemaker instrument opened in the DAW.
Maybe that was the dev’s intention. Either that or I’m missing something obvious.
Still, it works that way, and has been an amazing bass tool, but the extra steps seem a little tiresome some days.
But…. as I said, I do love the app.

### 5/5 — Double the trouble

*2023-06-08*

This app is great.. especially in duo instances. Brams work is the best ;) Awesome Job on this one man.

### 4/5 — Imprescindible si quieres el sonido.

*2023-06-07, version 1.7.2*

Pero... por qué no 5 estrellas? 
Es un poco desconcertante tener la Freq y la Reso en el orden inverso al que todos estamos acostumbrados.
A la larga, me resulta indiferente, porque me gusta el Controller, para agarrar con los dedos los botones físicos y lo configuro a la usanza. 
Maravillosos add ons en formas de onda y fx que convierten esta App en una auténtica bestia.

### 5/5 — Wow

*2023-05-23, version 1.7*

Wow

### 1/5 — I don’t know what happened… it just does not work.

*2023-04-12, version 1.7*

The app is broken for me. I can only see the sequencer - the whole top section is missing. No sound is coming out. Also it doesn’t show up as plugin in AUM.

It’s practically unusable and this is unacceptable for a 10 euros app. Please fix it or I’m gonna ask for a refund.

## Frequently asked questions about Troublemaker

### What does the Troublemaker app do?

Troublemaker emulates the sound of the legendary TB-303 bassline synthesizer. It features a carefully crafted diode filter emulation, sawtooth and square wave oscillators, and a Realtime Mutation Probability Engine to help you create distinctive acid basslines and other unique synth sounds.

### What are the key features of Troublemaker?

Key features include a diode filter emulation, sawtooth and square wave oscillators, a standalone sequencer supporting 1-64 steps, Audio Unit (AUv3) compatibility for use in DAWs, extensive MIDI support including CC controllers and clock sync, and the ability to export MID and WAV files.

### How much does Troublemaker cost?

Based on the provided information, Troublemaker is a paid application. There are no mentions of in-app purchases or a subscription model, indicating a one-time purchase for the full app.

### What devices is Troublemaker compatible with?

Troublemaker is compatible with iOS devices and supports Audio Unit (AUv3) integration, meaning it can be used within compatible Digital Audio Workstations (DAWs) on iOS. It also supports Core MIDI, Virtual MIDI, and Bluetooth MIDI input.

### What are common use cases for Troublemaker?

Common use cases include creating classic acid basslines for electronic music genres, experimenting with unique synth textures, sequencing patterns for live performance or studio production, and integrating the synth sound into a larger DAW project via AUv3.

## Version history (last 5 releases)

### 1.8.7 — 2026-01-18

Fixed a small bug causing samplerate mismatch on a small number of devices in standalone mode.

### 1.8.6 — 2025-09-05

Fixed minor issue with sample rates on some devices in standalone.

### 1.8.5 — 2023-06-17

Minor fixes and optimizations

### 1.8.4 — 2023-06-15

Fixed a display bug when running standalone on iPad Mini 6th Gen

### 1.8.3 — 2023-06-08

Minor improvements in standalone display

## Apps similar to Troublemaker

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| --- | --- | --- | --- |
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| [AudioKit Synth One Synthesizer](https://appshunter.io/ios/app/audiokit-synth-one-synthesizer/id1371050497) | 4.9 (26,818) | Free | Music |
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## More apps by Bram Bos

- [Ruismaker](https://appshunter.io/ios/app/ruismaker/id1122156899)
- [Ruismaker FM](https://appshunter.io/ios/app/ruismaker-fm/id1143644577)
- [Phasemaker](https://appshunter.io/ios/app/phasemaker/id1161642832)
- [Ripplemaker](https://appshunter.io/ios/app/ripplemaker/id1207806723)
- [Rozeta Sequencer Suite](https://appshunter.io/ios/app/rozeta-sequencer-suite/id1292546479)

All apps by Bram Bos: https://appshunter.io/developer/325340444

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*