This is a very simple script that transposes an audio file depending on the semitones specified.
It takes any wav or mp3 file using librosa. In the case of mp3, librosa uses audioread library to load the file, otherwise, it defaults to soundfile.
Two output files are created: .wav and .mp3, regardless of the input file extension,
At this stage, the script runs only with arguments. For example:
python simpleshift.py old_audio.wav new_audio.wav -2
Here you can specify the names and the paths of the original audio and the output file. The last argument is the semitone value.
Please note that this script also creates a new_audio.mp3 in addition to new_audio.wav, automatically. The name will be identical to the name specified in the output wav file.
- theatre licensing companies when dealing with audio transposition requests, often from amateur theatre companies that rely on prerecorded orchestras
- quick transposition of audio files for audition practice
- karaoke track transposition (need to be sober enough to use the command line)