For chord matching, you should create MIDI multi-pads. Most of the times, I use a MIDI of a song and rip out the parts I need for a pad.
I've created quite some audio link multi-pads, mostly not very tempo or chord dependent. When it should be chord/tempo depentent, I transposed / tempo-changed the WAV in Audacity before using it in a multi-pad. The disadvantage is of course that you always need to play the related song in the correct tone.
Another option is the usage of the Audio Player. It can change tone and tempo realtime and you can save all of those settings in a registration. I use this for "original" intro's for some songs, so I rip out the beginning from an MP3 with Audacity, fade out at the end, and use it in a song-registration as the default Audio Player song, with correct tone/tempo.
The possibilities are endless, just use your imagination