hosted by: Logo

LoopDub in use by the author at an outdoor
party called "Le Gazon", in Brussels, summer 2005.


Welcome to LoopDub, a cross-platform audio application for live loop manipulation.


Jul 3, 2010:
Version 0.4 released.
Jul 4, 2009:
The version control repository has been moved to git. The development repo is now available on github. Please feel free to fork it there or track it using the command:

git clone git://

Version 0.3 released (source only). See Getting LoopDub, below.

July 26, 2006:
There is now a developer mailing list! Please join it if you are interested in contributing or have any questions regarding LoopDub.



Getting LoopDub

The current version of LoopDub can be downloaded here. It is currently only working on Linux, but the next version will support Windows and OS X. See the INSTALL and README documents in the release for instructions on how to get it working.

Running LoopDub

If it has been installed correctly (See INSTALL), you can run loopdub by typing "loopdub" into a command-line, with the directory of your loops as the argument:

# loopdub /home/me/myloops/

Personally I have created a launcher on my GNOME desktop to do this for me, but the installer does not do this.

Audio set-up

Previously I was using a split-stereo setup, where the left channel was used for cueing audio. However, I have dropped this feature for the moment, and will probably make it optional in a future version.

The reason is that I found myself rarely ever using the cue feature in a real performance, and it served only to complicate things. For now the output is simply two-channel mono sound. Stereo will be supported in the future, and potentially multi-channel. However I have found it's not very important for the kinds of performances I've been doing. If there a need for it, let me know and I'll do it sooner.



Here is a quick breakdown of how to use LoopDub:

Top controls

Beats: click on this until it reads the correct number of beats in your loop. Then corresponding BPM will be displayed next to the button.

Autocue: when checked, the "cue" button will automatically be selected when a new file is loaded. (Cue is currently a disabled feature.)

VU Meter:Shows the current amplitude of final output signal.

Master Volume:Adjust this slider when VU Meter is very close to the top, otherwise clipping may occur, which doesn't sound very nice.

Learn: After selecting your midi input device, click this button to "learn" which controls are for what. A sequence of controls is highlighted, and you move the corresponding control on your MIDI keyboard to teach LoopDub which function it corresponds to. At the moment I usually use my sliders for volume and my knobs for effects. This means I am currently not using 4 of the knobs.

Loop controls

Cue: Puts the loop on the cue channel. This feature is currently disabled, because I never found myself needing to use it.

Split: Divides the loop into smaller pieces. These splits are used for a couple of different things. You can click and drag on the loop with your mouse to select a sequence of "parts" to be looped instead of the whole thing. This can be useful for changing how a beat sounds or looping a strange voice clip. Also, the "Hold" function will drop the sound back in on the next split boundary, which is useful if you don't want to wait until the end of the loop.

Keys: Chooses this loop as the "key" loop. Only one loop can be chosen at a time. When any loop is chosen as the key-control loop, it will no longer be played along with the other loops. Instead, it will be triggered when you press keys on your keyboard, at the correct pitch. This allows you to play melodies in realtime along with the other loops.

Hold: Cuts the volume on the loop until the next split boundary. This is useful when you are cueing a track and want to have it come in on a particular bar instead of manually having to throw the volume slider. Once you click "wait", you can move the volume slider into position without affecting the output, and it will come in when the position indicator hits either the next split boundary or the beginning of the loop.

Norm: This will normalize the loop. Useful if you've forgetten to do this beforehand. Sometimes a quiet sample will have difficulty competing with the rest of the sounds in the mix.

Break: This is not yet implemented, but it will allow you to use the keyboard to trigger the loop from within different parts, based on the current split configuration. In other words, you will be able to re-sequence a breakbeat or whatever you want, in realtime.

Keyboard commands

Numbers 1 - 8: Pressing numbers 1 through 8 on your keyboard, you will notice that the corresponding loop number turns to a blue background. This means that this loop sample is selected for being modified by MIDI controls. You may also select or deselect a loop using a key on your MIDI keyboard, as long as no loops are selected as the "key control" or "break" loop. It is known that there is not yet a configuration for MIDI channels, this is on the TODO list.

Enter: Starts and stops audio output.

Alt-Enter or F: Toggles fullscreen mode. (Very nice for live sets, try it!)

Escape: Exits LoopDub.

Known issues

There are many things that need to be changed and improved and added to LoopDub, however I will list a couple here that are imperative that users know about:


Get in touch with me at

Last edited by Stephen Sinclair: July 1, 2006