I take it you are looking for easy to use. Maybe someone could write such but there are ways to do what you want (even if not easy) and then you can always do a post production where you add tracks just like audio engineers do.
I thought I could easily record a capella alone and I thought I could find software to offer the convenience of starting playing an audio file and recording sound at the same time(like using headphones and recording only my sound) so I could stack the records without any hassle with timing and create my amateur a capella record alone but I can't find anything like that.
Such software would be very useful...
Please help

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