In a lot of Youtube videos you can see this pedal being demonstrated to create some extreme sounds, and it's true. It has the capabilities to make these sounds, but in my opinion it's not where this pedal shines.
But when dialed in a bit more discretely to get that extra sustain or that howling overtone in a solo it's just wonderful. And it's so natural sounding. It doesn't sound like a digitally created sound by any means.
You might be surprised to find out how you can and can not use this pedal.
As the effect doesn't kick in instantly even with the onset set to minimum it might be difficult to use the dry-off feature in a rythmic fashion.
Keep in mind that the two Natural settings are unpredicable, for good and for worse. You can get different overtones on the same note each time you hit it. Nothing I want to gamble with in a live situation, but that's me.
Another thing to keep in mind is that when there is nothing more to track from your guitar, the effect will cut off abrubtly. This issue can be redeemed to some degree by setting the gain to max which will be quite louder than unity gain.
But the best solution is to get help from a real musical situation. If you play loud enough, the created feedback will get you into real (but still controlled) feedback which makes the experience even more realistic. So when I disengage the pedal and the created feedback stops, the real feedback is still ringing, but will now decay as the Freqout no longer pushes it into this real feedback. It's really cool!
(As real feedback runs continiously through your guitar pickups the Freqout will keep tracking for unlimited sustain.)
I hope Digitech will release an upgraded version with the possibility to store settings. Adjusting these small knobs on a dark stage isn't fun. The controls are quite sensitive so precision is the key to have the pedal do what you desire.
I do not recommend this pedal to be a substitution for octave pedals or ebow or whatever. It's something different.