Can the PolyTune plug-in be installed as a stand-alone utility on my computer, or will it only work as a plugin in a DAW?.
The PolyTune plugin does not work as a standalone application.
To use it, you need an application that supports VST, Audio Unit or AAX plugin format. Typical hosts are Cubase, Pro Tools, Logic (on Mac), Live, Reaper, Studio One, etc..
Most of these hosts have light versions with reduced feature sets at reduced prices.