In the Audio Lab, you can edit the audio files and samples used in your session.
In case of audio files, you can set the precise start location where the audio part which is playing this audio file must begin.
Via the timebar's context menu, you can create new locators if you want. And via a locator's context menu, you can define which locator should be the start locator for this audio part.
Drag the start locator to where you want, eventually zoom in to get a more detailed view.
In the Audio Lab, you can also apply basic functions on a selection of the audio file.
Note however that the functions are applied directly on the audio file itself, so make sure to backup the audio file if you want to keep the original version!
Info Tips:
- To pan/zoom the editor, use the standard editor navigation methods.
- You can use [Tab] to switch between Composer and Sequence Editor.
- You can use the [Esc] and [Return] keys to go back to the Composer.
- You can create new locators via the timebar's context menu.
- MU.LAB automatically snaps your edits to the zero-crosses in the audio.
The difference between Audio Files and Samples
The difference between MU.LAB's Audio Files and Samples is this:
Audio files are streamed from disk at the audio engine's samplerate. They cannot be pitched up or down. But they can be very long, up to hours, no problem.
Samples are loaded into RAM and can be played at various pitches. But it's best to not load too many/long samples as then you might run out of RAM which may cause system instability.
Using an external Audio Editor
The Audio Lab has only limited DSP functionality because there already are so many good (and free) audio editors on the globe, e.g. Audacity and Wavosaur.
The nice thing is that (on Windows) you can setup MU.LAB so it can work together with one of these audio editors:
- Go to the main Edit Menu -> Preferences -> Choose External Audio Editor.
- Browse to the relevant application file (.exe).
Now you'll see that when you right-click the audio display in the Audio Lab, you get a context menu option "Edit In Audio Editor", where "Audio Editor" will be the name of your favorite audio editor.
Then MU.LAB transfers control over the audio file to the audio editor, and so MU.LAB stops playing the audio file.
Now you can make any edits you want in the audio editor, and save them to the audio file.
When you switch back to MU.LAB, MU.LAB will notice the changes and propose to re-open the audio file, and update everything to the fresh edits 
On OSX, this automated system does not (yet) work.
However OSX and Windows users can both also reach the same functionality by 'manually' doing completing the following steps:
- Right-click the audio display in the Audio Lab and choose "Start Editing".
- Now switch to the other application and start editing the audio file, then save your results.
- Then switch back to MU.LAB, right-click the audio display in the Audio Lab and choose "End Editing".
All this will have the same effect as the 'automatic' mode.
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