Released in 2008, the DD-7 is the fifth model in Boss' popular line of Digital Delay pedals. It expanded off of the DD-6 two new Delay modes, external pedal control options, longer delay time, and more. "Modulate" provides chorus-flavored delay sounds, and "Analog" is a modeled simulation of the classic BOSS DM-2, beloved for its characteristic warmth.
Going yet further from the DD-6, the DD-7 gives up to 6.4 seconds of total delay time. It still has the same stereo output functionality, and you can use the tap tempo on board or with an external FS-5U switch. You can also plug in an expression pedal to control delay time, feedback, and effect level on the fly.
Starting with the DD-3, Boss' line of Digital Delay pedals have been popular because they are reliable and easy to use, and they produce clean, musical delay effects. The DD-7 is loaded with features, so it gives you a ton of versatility. If you've never delved into the world of delay, the DD-7 has plenty of sounds to whet your appetite. For some, it can be a cost-effective foray into discovering new sounds, but for many, the DD-7 may be all the delay you ever need.
This circa-2010s Boss DD-7 was used professionally by Drew Emmitt of Leftover Salmon. For a road-used pedal, it's in decent shape—it shows some scuffs, scratches, and signs of use (see photos). The bottom label is missing, there rubber grommet around the battery screw is chipped, and it looks like a scratch on the control panel has been filled with sharpie. But it functions 100% as it should (Boss pedals are built to be tough), and it sounds fantastic. This is a simple, easy-to-use, dependable delay that packs a wide variety of sounds, thanks to the different Modes on tap.