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Alternatively, have you contacted the original artist, explained what you have in mind, and asked for an instrumental-only cut?
I'll look int othe software that you specified.
Yes, I have looked around napster, iTunes, connect and walmart music downloads for the instrumental version of the song. I'll try and contact the record label company, i'm afraid the artist is too popular to contact directly.
Yes, the record company will often give the remixer/producer copies of the original masters, or mix elements (such as just the vocal), or an instrumental version to start from.
[take the part that you like, slice it out and loop it ]
That's more common especially for unauthorised remixes.