The DR5 comes equipped with a built in sequencer with 4 tracks.
It also has a fret-board style interface,chord macro function allowing one to choose a specific chord by inputting the root note
& chord type and an external pitch function.
The unit also has the basic step & real time recording and as an added feature, a built-in amp simulator.
I checked the unit out a few days ago and it perf'd decently.
The drawbacks to this unit is a small memory allowing only 20 songs recorded and held in it's banks, kits that sound similar to
the older model DR Groove 202 (which I use now),
a chromatic tuner that sometimes registers a key a step above the root-note and a guitar modeler that is no where near a pod or even Beh V-Amp.
However, the DR5 is importantly geared with a wide variety of kicks and snares(32 & 40 respectively) and cymbalswhere you can adjust resonance & decay with a higher incremental value than Boss's other line of "canned drums".
Unit is 16 bit and clocks @ 48. It is indeed an upgrade of other Boss machines and if I didn't own the 202, I would consider this unit. However, I've grown tired of "canned machines" and now
intend to move to the next level; purchasing an actual drum kit!
Ain't nuthin' like the real thing baby!
Peace
Q.rM