That's bad for reproducibility, which is why I'm in favor of the "put input and output files in different directories" approach. However in this kind of library, if you allow the input file to be overwritten, if you run the same process twice you get different results. That's bad for reproducibility, which is why I'm in favor of the "put input and output files in different directories" approach.īecause of ^^rant, I prefer to throw an error, rather than use the tempfile approach. In this case, you can still "reproduce" the results because the original information is preserved. Other types of libraries might do something like "run process, create a new text file" and allow you to overwrite said text file. In a library like this the main paradigm is creating outputs by modifying inputs. shutil, librosa) that happily overwrite files and it's a fairly common use case. An alternative solution is what you propose (raise an error), which would be better than the current behavior, though I don't see why you wouldn't want to support overwriting the input file - there are plenty of tools out there (e.g. Sox will keep the WAV settings the same as the source material so you should be able to, quite easily, drag and drop these split files back in to GarageBand as mono tracks.However, my preferred solution would be for pysox to use tempfiles (as per my example) to basically yes support using the same path for input/output. With the file on disk, open up a Terminal program and change to the location: cd ~/Music/GarageBand/bounces/Īnd then run this sox to command to split the file in to two mono tracks, one for the left channel and another for the right channel: sox My\ Song.wav My\ Song.L.wav remix 1 First, from GarageBand, export your stereo track to disk as a wav file. With sox installed we can split our audio file in to two mono tracks with one simple command call. We're going to use it to install sox, "the Swiss Army knife of sound processing programs": brew install sox With Homebrew installed you can install all kinds of cool command line tools using the brew command. Open up Terminal and type: ruby -e "$(curl -fsSL )" There's a command line approach to this that, once you get it all set up, is a little more straightforward.įirst you need to install Homebrew, the best package manager for OS X out there.
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