Those who have told you that what you're asking for can't be done--by ANY software--are correct. The "unbake a cake" analogy is a good one. Once an audio track is mixed together, you'll never be able to completely isolate one element from another--there's too much overlap. If you think about the frequency range of the human voice, you'll realise that it overlaps with most common musical instruments. Since software can't know whether that 400Hz note is from a voice or a guitar (just an example), it'll either cut out everything at 400Hz or leave it all in. Having said that, depending on how the track has been made and mixed together, Audition is probably one of the best pieces of software out there at playing with this sort of thing. The results can be anything from amazingly good to amazingly bad depending on the source material though. Some of the built in Audition tools to have a look at and play with would be: Effects/Stereo Imagery/Centre Channel extractor which lets you boost or try to remove parts of the audio track. However, the effectiveness will depend entirely on how the mix you're playing with was recorded and too much use can really destroy the bits you want to keep. Restoration/Noise reduction: can be effective on any really constant background noise but, again, over use can mess up your music. EQ can let you cut certain specific frequencies and boost others. However, as said, the human voice spans a wide range of frequencies shared with musical instruments. Spectral View tools let you actually draw around certain parts of the audio and either just delete them or fill the hole with other sounds--extremely powerful but very time consuming and takes practice to get good at doing this. (I'm not going into the details of how to use the individual tools--each subject would need several pages of instructions. The Audition manual or some of the online tutorials are a better bet once you know what to look for.) So, to sum up, no software in existence can do what you want at a simple press of a button. However, if you are will to accept that the results will never be perfect and will often be dire, Audition has one of the best range of tools to ATTEMPT this of any DAW on the market--and certainly the very best range at its price bracket. If you've head instrumental versions of music used in the background of TV shows, that's because, at a professional level, companies just buy access to the unmixed music tracks. However, only trying and playing will let you see how close (or not close) Audition can get to what you're after. Bob
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