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evadecker/audioshift.sh

Last active November 23, 2018 21:05
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Shift audio pitch up or down
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audioshift.sh
# Calculations courtesy of http://www.microsoftbob.com/post/Adjusting-Pitch-for-MP3-Files-with-FFmpeg
# Up half step
ffmpeg -i input.wav -filter:a "asetrate=r=46722.3224612449211671764955071340,atempo=0.94387431268169349664191315" output_up_halfstep.wav
# Up whole step
ffmpeg -i input.wav -filter:a "asetrate=r=49500.5763304433484812188074908520,atempo=0.8908987181403393047402262055" output_up_wholestep.wav
# Up 3 half steps
ffmpeg -i input.wav -filter:a "asetrate=r=52444.0337716199990422417487017170,atempo=0.84089641525371454303112547623321" output_up_3halfsteps.wav
# Down half step
ffmpeg -i inpute.wav -filter:a "asetrate=r=41624.8571892626832019083702090380,atempo=1.05946309435929526456182529494630" output_down_halfstep.wav
# Down whole step
ffmpeg -i input.wav -filter:a "asetrate=r=39288.6334699889633390439756665420,atempo=1.122462048309372981433533049679" output_down_wholestep.wav
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