Turn your iPad, iPhone, or iPod touch into a bass synth and start rolling your own grooves with the unique sound of the legendary TB-303, the trademark of Acid House that influenced many different styles of electronic music!

BassLine is a virtual analogue bass synthesizer with built-in step sequencer and on-board effects. Its unique low-pass filter allows to produce the well known high-resonance filter sweeps, that are typical for vintage synths like the legendary TB-303.

Feature List:

• Monophonic synthesis engine including a never self-oscillating, cascaded low-pass filter

• Four oscillator waveforms (sawtooth, square, pulse, and saw/triangle)

• Low frequency oscillator (LFO) for cutoff modulation

• Overdrive with tube-like distortion characteristic

• Tape echo effect with tempo-synchronous delay times

• Individual pattern lengths & downbeat-aligned switches

• Gated sequencer mode with real-time pattern transposition

• Pattern randomizer

• Play in time with Ableton Link

• Audiobus support, including state saving

• Inter-App Audio (Generator mode) with host transport sync support

• WAVE file sharing via "Open In...", Pasteboard, and iTunes File Sharing

• Background Audio with battery-saving Auto Standby

• MIDI Clock sync/generate

• MIDI Note in/out

• MIDI CC in/out

• Including twenty Acid basslines by DJ/producer Myagi (

• Project file access through iTunes

• Universal support for iPad, iPhone, and iPod touch

BassLine was used by Gorillaz on their album "The Fall"!

What's New

Version 5.1.1

Version 5.1.1

- Fixed a bug

Version 5.1

- Ableton Link integration
- Inter-app Audio host timeline sync
- Pattern switching via MIDI Program Changes
- Output of MIDI Control Change messages
- MIDI Clock sync improvements

If you like BassLine, please take the time to give us a nice review: it really helps.

Ratings and Reviews

4.8 out of 5

8 Ratings

8 Ratings

Nice basslines!


Really nice when used in automatic sync thru the built-in Link support, with the dev's other apps. Adds nice basslines to drum machines for example.

Booming Bass


It's a great iOS music app. This really fills the low end. I'm glad they've continued to update this funky sound.

Works for great basslines...

Ben Efitofadoubt

and as a general 64step sequencer.
Solid app from a solid developer.


Markus Waldboth
5.3 MB
Requires iOS 8.1 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2008-2015 Markus Waldboth


  • Family Sharing

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

More By This Developer