Scotch has the foot pedals right.
For example, you can step on a button and go from a clean mellow tone to a loud distorted sound for a solo. Add delay (echo) to make it sound like there's more going on. Reverb is almost an echo, but not quite. For no reverb, stick your head in a closet that's full of coats and clothes and talk. You don't really hear anything back in your ears after you've stopped talking. For reverb, talk in a church or large room with hard walls. You hear your voice hang in the air just a little longer than your last word. Delay is like a longer version of reverb where you distinctly hear the word (or note) a second time like an echo from yelling in a canyon.
With the right foot pedals, you can sort of make one guitar sound a lot like just about any song on the radio.
Iew.hmm. well first off i enjoy sticking my head in random places.
Almost echo. Scotch said it better. It's like talking in a large restroom vs talking in a full closet.second, so reverb is a fancy word echo? ok. i can get that.
He's just using his hands to show what each pedal does. Most of the time you set them where you like them and only have to step on them when you're playing. You can see the girl in the video Scotch posted with the flanger step on her pedals.third that dude looks like a weird david schwimmer. trey usually just uses his foot and doesn't bend down to touch the knobs. he seems to me like a guy who really knows about guitar...so is he doing it wrong or what am i missing something here?
fourth. thanks guys. you just taught me stuff and learning stuff is cool.
That looks like a fun job to have.
Funny you asked. Mrs Scotch and I spent 30 years living in the east corner of southern NH. 75% of the people living there commute to work in Massachusetts (as I did). So anyway, we became friendly with the realtor who spent months finding us a lot to build our house in Maine. Her husband had just gotten a job at Fractal Audio, which I never knew about, and it's located in one of the NH towns I lived in! I was speechless. The guy's job is to make awesome audio equipment for the world's best guitarists, and the place is a mile from my house. Holy shit!That looks like a fun job to have.

Speaking of all this, Hurt by Nine Inch Nails is a favorite song of mine, and Johnny Cash's version is really movingI too love Dave Grohl. I've spent a good part of my life chasing the bands he's played in. With Teeth by NIN, Songs For the Deaf by QOTSA, Mike Watt, Cat Power, Them Crooked Vultures, etc.