Ok, so I'm setting up my gear as we speak to give this a go (haven't mucked about with any of it in about a year). I'm plugging my guitar into a Digitech RP 55 for effects, then into a PreSonus Audibox USB 96 interface, then into a usb port on my pc.

My worry is that since the PreSonus only allows sound monitoring though itself (I've got my headphones plugged into the interface to hear the things), will anyone else be able to hear what I'm playing during a jam session, or does the app work about the same as a DAW?

Sorry if it's a terribly annoying question, in which case, I'll let myself out

Hi Codis1789,
Yes, jammr works like a DAW. Software monitoring is recommended:
1. Turn the Mixer knob on your audio interface all the way to Playback.
2. Enable the “Play back my audio” setting in jammr.

This way you'll hear the same mix that other users hear from jammr. This is important because you'll be able to set your guitar volume correctly.

Stefan