Cedr is a chiptune synth with a built in step sequencer. This is a slaltline legacy plugin and therefore is only available in 32 bit format. To run 32 bit plugins you will need something like jbridge.
Cedr along with my other old saltline plugins are available to download for free here.
This was put together using only sounds from the ZX spectrum, running programs, Tantrum and Chance. Tantrum is a step sequenced beat creator and Chance is a random note generator. The parameters of both programs can be edited. This piece was put together using several different recordings on both programs. The results were then layered on top of each other in Ableton and a few effects added (delay/reverb).