I went on the AAS site and downloaded some sounds...
http://blog.cakewalk.com/free-aas-sound-bank-player-for-all-sonar-x2-producer-customers/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+gridserver%2FXiBy+%28Music+Production+Software%29&utm_content=My+Yahoo
 
It came in a single Zip file. I thought that this was all I needed.
 
I installed
Sounds from BLKRTZ.exe
 
I opened AAS Player 64 bit and entered the key. The key successfully validated but I wasn't able to play any sounds .
 
I couldn't hear anything using the AAS Player no matter how I changed the audio settings.
 
I restarted the computer.
 
Within Sonar, I reset all VSTs and re-scanned, having added the folder for the 64 bit version of the plug in.
 
I inserted a Synth and choose AAS Player from the VST Plugins folder.
 
I added a midi track and sent a note to the plug in...
 
No sound.
 
Where am I going wrong?

Do you get any sound by clicking one of the virtual piano keys in the PRV?

If you're using an external keyboard, make sure it's transmitting on the same Midi channel that the Midi track is set to receive on (should be Omni on the Midi track)

Thanks for responding Bristol_Jonesey.

I don't know where I'd gone wrong but it's fixed. Ty!