This unit is in great shape for how old it is. It's got one bent rack ear as you can see in the photo but the rest looks like what you'd expect from a piece of equipment from the 80's. It has been bench tested and all the functions seem to work like they're suppose to. A little contact cleaner would be helpful to clean up the oxidation build up on the jacks. Besides the bent rack ear, there doesn't seem to be any major issues with this unit. Please look carefully at all of the photos to see the condition of this unit before making a purchase because NO RETURNS ARE ALLOWED ON USED VINTAGE GEAR.
The Yamaha D1500 is a digital delay system with a time range of 0 to 1023 milliseconds in 1 millisecond increments, with full 20Hz to 18kHz frequency response throughout the delay range. It was the first commercially available digital delay with a MIDI interface and follows the success of the R1000 Digital reverb.
Any of the D1500's 16 programmable memory banks can be selected remotely from a MIDI instrument. This allows specific delay effects to be assigned to particular instrument voices. The appropriate delays are then recalled automatically as each voice is selected.
For non-MIDI equipment, programmed delays can be recalled simply by selecting the appropriate bank – either manually or by footswitch.