Roland TR-626 became one of the very first full-digital drum machines which are based on compressed PCM samples – it also the latest unit of the famous TR series. It is an updated digital version of the classic TR-606 and TR-505. The design is very similar to the latter one, but some useful functions have been added to the interface.

The core is based on CMOS 8 bits CPU HD63701Y0P which is controlled by 8-voice polyphony. The library consists of 30 samples with some minor restrictions (simultaneous playback of snare 1 and snare 2 is impossible). Anyway, the rhythm machine has several peculiarities owing to which it differs from its predecessors: the samples became thicker and purer. Moreover, it became possible to change the pitch within a 7-semitone range.

Recording patterns in the sequencer is similar to the Roland TR-707 system with the available Real-Time and Step modes. By the way, it reveals several interesting functions, such as: swing, flame, accent, etc. In addition, there is a "Block Sequence" mode and loop making up to 256 steps (16 steps/16 loops) is available. TR-626 was used by such performers as Vangelis and Jimmy Edgar.