Great, it does both polymeters and polyrhythms. Tracks can be any length of steps individually, and there’s a function called ‘sync scaling’ which enables true polyrhythms together with other gear.
From the manual:
"Sync-scaling
For users syncing the Deluge as a slave and wanting to make use of unusual time signatures, sync-scaling is a fun feature. A track of an unusual time signature may be created by setting its length to an unusual number of beats - e.g. seven 8th-notes. Using sync-scaling, the Deluge, when synced as a slave, can make those seven 8th-notes take up the same amount of time that the incoming MIDI beat clock says that eight 8th-notes are meant to take up.
There are a couple of applications for this:
● The user may wish to create polyrhythms by e.g. having an external device (the syncing master) playing a sequence in 4:4 timing, while the Deluge (the slave) squeezes 7 notes into a bar instead of 8.
● As mentioned above, some loop pedals may act as a syncing master. However, they are likely to assume that any loop created (e.g. with a guitar) is in 4:4 timing. If the user had in fact played a guitar loop in 7:8 timing, the loop pedal would still be outputting a 4:4 MIDI beat clock - dividing the entire loop into, say, fours rather than sevens. The solution is to tell the Deluge to scale the incoming 4:4 MIDI beat clock into a 7:8 one, so that a 7:8 sequence created on the Deluge would play perfectly synced to the 7:8 guitar loop, despite the incorrect 4:4 MIDI beat clock passing between the two devices.
Sync-scaling is tied to the length of one track in a song, and tells the Deluge that that track’s length should be squeezed into 1 bar of incoming MIDI beat clock (or 2 bars, or 4 or 8 bars, depending on how long the track is; the Deluge will use whatever magnitude of sync-scaling causes the smallest change in tempo)."