Check out this video of an unnamed guitarist performing 40 different guitar techniques in one solo. He starts off with a few hammer-ons, works his way through some very nice one-hand tapping, two-hand tapping, sweep picking, banjo rolls, slapping/popping and more.
Students from Purdue University's School of Mechanical Engineering have developed the Ghost Pedal, a wireless device that uses sensors attached to the guitar player's foot to create a wah effect—minus the physical pedal.
First impression? Everything is well marked. This sounds like a given, but I’ll occasionally try a pedal named something like "The Woodpecker." Next I’ll spend 20 minutes figuring out what the "Beak" and "Sapsucker" knobs do. With Outlaw Effects, Tone is a tone knob, Sustain means sustain. Kudos, Outlaw!
In its most raw form, it’s little more than the raising and lowering of your signal’s volume. And not only is tremolo one of the oldest and most recognized effects in the electric guitar’s history, it’s also been traditionally implemented via analog circuitry within amplifiers. Today there are still a lot of amps on the market that come packaged with a tremolo effect.