I've had a Line 6 DL4 (Keeley Modded) for a couple of years now. In my experiences I've been able to tweak out some really cool settings for useful and crazy effects. There's been more than one occasion where I've had other guitarists come up and say "How were you doing that and what did you use?" When I say my DL4 they usually give me a funny look and say "I have a DL4 but I've never gotten those sounds!" So I thought it would be cool for some TGP'ers to come together and share some of the unique sounds they get with their DL4's so we can pool the knowledge. Here are a few: (in looper mode) double tap the record switch really fast to get this nice on-the-edge-but-never-feeding-back cascading delay. very cool and very different than any of the presets. (in looper mode) click the halftime button BEFORE you start recording your loop. voila! you now have a 28 second loop to play with rather than the 14 second one! i'm really confused as to why Line 6 doesn't share this move openly. it would be a nice marketing bump for the DL4. auto-volume preset: set it to the longest ramp up time, stretch out the repeats and delay time. you can layer synth-like sounds so that people in the audience start straining their necks to see where the keyboardist is (this move gets the most comments). i love running this preset into a tremolo pedal. reverse preset: set it to one repeat with the mix about equal to the input level. then get your timing right so that if you're chugging along with 8th notes, you can switch to just playing the quarter notes and let the delay come in reverse and make it sound like you're playing this weird, rhythmic, reverse/normal part. (took me awhile to recreate this sound...for one of our band's songs, the producer manually reversed each one of my chord hits so that each chord was played in reverse...tedious! i wanted to be able to get close to that sound live and this pretty much does it!) reverse preset: i also messed around with the settings to get it to do an weird, quasi-sequenced tremolo sound. very unique and useable. i use the expression pedal to morph between those two settings. THE EXPRESSION PEDAL! i don't understand why people don't always use this on the DL4. not only do you get to morph and do some cool ocillation sounds, but you can effectively double the amount of presets! i set the forward position on one preset to be very different than the back one. then i can choose which one i'll use for a song/part. 6 different sounds rather than 3! of course, you can't switch between modeler types (ie mem man model to the multi-head), but i can get pretty different sounds out of one preset by using the knobs. so i've shared a few of my secrets, what are yours?