If your distributor request a single-channel mono audio file but GarageBand only produces a two-channel audio file, then you can do a simple trick in iTunes.Īfter you bounce your GarageBand Project to an AIFF file, use the "Create New File" command under the File Menu. Two Channel (stereo) to One Channel (mono) conversion:
The procedure looks something like that in a signal flow diagram: Remember, GarageBand still creates a two-channel audio file the left and right channel of your output is now "merged" into two mono signal. Add the Gain Plugin (listed under the Utilities menu) and select the Plugin Preset "Convert to Mono". Open the Smart Controls and select the Master Button. There is one hidden trick in GarageBand where you can convert your entire mix into a mono mix. If the source signal is a single channel mono signal, for example, one mono audio file on your Project, then you are still mixing to a two-channel (stereo) audio file, where both channels (left and right) carry the identical mono signal However, GarageBand still exports to stereo (which means two audio channels). The procedure I showed earlier is how to convert a single Audio Region (audio file) inside your Project. "Stereo - Mono" is a very tricky subject with a lot of misunderstanding, confusing terminology and hidden tricks.
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