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Is there such a thing as an audiodiff to tell how different they are to yours?
by scrollaway 8y ago
Is there such a thing as an audiodiff to tell how different they are to yours?
- jmillikin 8y agoYes: you can use Audacity (https://www.audacityteam.org/ https://www.audacityteam.org/) to "diff" two waveforms by subtracting one from the other. For comparing .wav files you can also treat them as plain binary data, and use standard diff tools. For example I used `cmp -l` to count differences between rips, and `vbindiff` to view them.
- thr0w__4w4y 8y agoThanks for mentioning vbindiff. I examine/compare binary files a lot (reverse engineering for security) and I've used a bunch of tools, but somehow I've never come across vbindiff.
- dylan604 8y agoFirst thought: Invert the phase of one of the tracks 180 degress, then sum them together. Anywhere the is a bump in the waveform would show a difference between the two sources.
- tomc1985 8y agoFunny, you can use this technique sometimes to pull clean vocals (for remixing) from certain kinds of music (they have to be panned center in an otherwise stereo mix): a) reverse one of the channels and them sum them and you'll sum will contain only stereo data b) reverse and sum (a) with the original track to get only the mono content
- deleted 8y ago[deleted]
- tialaramex 8y agoFinding the signal difference is easy, the nature of PCM means we can just subtract one recording from another. However human hearing doesn't just import the signal, the initial processing is done during acquisition itself. Psychoacoustic lossy audio encodings like MP3 rely on this, an MP3 sounds to you very much like the original but a naive audiodiff would find huge differences.
- r721 8y agoAudio DiffMaker: http://libinst.com/Audio%20DiffMaker.htm http://libinst.com/Audio%20DiffMaker.htm