Boss DM-100 Analog Delay Machine

Boss launched the first delay pedal in 1978 with the DM-1 Delay Machine, offering an alternative to more expensive echo devices. It offers delay times from 25 to 500 milliseconds. The DM-100 Analog Delay Machine, a module that combines delay, chorus, and echo, was released in 1980.

The DM-100 corresponds to the first version of the DM-2 delay pedal and CE-2 chorus pedal in a device that integrates BBD (Bucket Brigade Device) technology and generates echo effects using FCF (Frequency Controlled Filter). It uses an integrated circuit (IC) developed specifically for Roland, which is characterized by excellent signal reproduction and low noise. The low-noise performance is made possible by a compander circuit (compressor/expander) for noise reduction and the FCF, which gradually fades out higher frequencies as the delay time increases, creating natural reverberation effects while removing unwanted background noise. The controls are Input Volume, Repeat Rate, Intensity, and Echo Volume, as well as switching between the two modes Delay and Chorus. The delay has a delay time of 20 ms to 400 ms. The amplifier is activated via a three-position switch and input gain. Outputs are provided for direct and effect signals.