Roland TR-77 Rhythm 77

The Roland TR-77 Rhythm 77 is a drum machine released by Roland in 1977. It was one of the first drum machines to feature a programmable memory, allowing users to store and recall their own patterns. It was used by a variety of artists, including Kraftwerk, Gary Numan, and The Human League.

The TR-77 is a monophonic drum machine, meaning it can only play one sound at a time. It features 12 preset rhythms, as well as a programmable memory for storing up to 16 patterns. It also has a built-in metronome and a tempo control. The TR-77 has a simple interface, with a few knobs and buttons for controlling the sound and rhythm. It also has a built-in speaker, allowing users to hear their patterns without having to connect it to an external amplifier.