Hi is it possible to remove, say, the electric guitar part from an MP3 whilst leaving the other parts? sounds difficult to me but i dont know about this stuff, please help
The only thing that can be removed automatically from stereo files is sound located exactly in the middle of the sound stage (e.g. singer's voice) by substracting the channels. If the source is mp3 this will sound awful as artifacts becomid audible. Removing something else is possible in theory, but you would have to process every note played manually using a sound editor like CoolEditPro (=Adobe Audition), zooming in in spectral view/doing a frequency analysis, identifying the frequencies that belong to the instrument and applying a FFT filter (similar to an equalizer) that filters out these frequencies. This will take hours/days of work for a single song and most likely the result won't sound nice.