BOSS DD-8 Digital Delay Features:

• Compact digital delay stompbox with 10 seconds of delay and 11 versatile delay modes
• 40-second looper with overdub capability for practice, soundchecks, and on-the-fly backing 
• Tap tempo enables you to synchronize the delay’s tempo via the onboard pedal switch
• Carryover switch enables delay trails to continue after the effect is bypassed
• True stereo I/O and 3 selectable output modes (independent, panning, and wide stereo)
• Smart I/O functionality supports an endless array of applications
• Add external footswitches for on-demand tap tempo, extended looper control, and an echo-laden Twist effect

Modes: 

• Analog — Classic analog BBD delay.
• Standard — Crystal-clear digital delay.
• Tape — Vintage tape-based delay.
• Warm — Digital delay with a softer sound.
• Reverse —Backwards delay.
• +RV — Digital delay with reverb.
• Shimmer — Lush, pitch-shifted delay.
• Mod — Digital delay with modulation on repeats.
• Warp — Delay with expressive pedal control.
• GLT — Creates rhythmic, glitchy machine-gun effects.
• Loop —Loop recorder with overdub capability and 40 seconds of recording time (in mono).