Got my Digitech Freqout pedal today. If you haven't heard of it yet, it's a new pedal from Digitech that lets you get feedback without playing loudly in front of an amp. I recorded this little snippet while playing through headphones .
https://soundcloud.com/bryster/freqout-ex
This was recorded with the type set to "3rd", which means the feedback will be the third harmonic above the dry tone. I have the onset turned all the way up, so you don't hear feedback until a note is sustained for a couple of seconds.
It's amazing, it's like stepping in front of an amp! Very inspiring. Set the type to 1st, turn off the dry and you can use it like an ebow. Or turn up the dry and set the type to sub for an octaver. They were really smart about the number of controls to include, so you can use it a lot of different ways.
It's not perfect. You get some unnatural effects sometimes when sliding. And there's subtle aliasing with high pitched tones. But this is awesome, I'll get a lot of use out of it.