Separate speakers different outputs from one computer Answered

Hello everyone. I'm working on a project right now that requires me to send 3 individual tones to 3 individual speakers without any overlap. I had decided that I was going to use the program audacity, as it can generate the tones and frequencies that I need, and a 6 channel amplifier connected to the 3 speakers I'm using. However, after I played around with it, I found that I could only generate 2 tones at a time, and could only get them to play out of the individual speakers I wanted by adjusting the L/R balance on the individual settings for each tone, but I can't create more than 2 without getting overlap. I was wondering if anyone knew if there was a plug-in that would solve the problem that I'm having. Thanks in advance for any and all help.