While this is definitely a plug-in that I used rather sparingly, I never found it a trouble to run as many as I needed in this configuration. The computer was a Hewlett Packard Pavilion dv8000 lap top with a 3. I don't have this plug-in on my current system, but I used to run it in Cubase SX with a MOTU 896 HD audio interface. In general, the Antares Systems Avox Choir plug-in is one that won't take up very much of your processing power. I don't think that a manual is necessary unless you're having installation or technical issues. There are a series of sliders to control including those for vibrato, pitch, timing, and stereo spread. The main parameter to control is the number of voices that you'd like to have, which ranges from 4 to 32. As far as using the plug-in itself goes, the interface is quite user friendly and is for the most part self explanatory. I didn't have an issue installing the plug-in bundle, as it only took a short while and was easy to do, as is normally the case when installing plug-ins - just make sure you have everything going to the proper places. It cannot be bought as an individual plug-in - at least not that I know about. Antares Systems Avox Choir is a voice multiplying effects plug-in that comes within the Antares Avox bundle.

Avox choir plugin