Both Live Audio Drums and Live Drums are played by Live drummers, but here is where/how they differ:

Live Drums (Grooves):- Initially played by a drummer, then cut/time sliced and reproduced by Midi notes/controlled by a machine/keyboard.

PROS:- More control especially with style tempo. More 'editable' than Audio Drums as individual 'parts' can be replaced or deleted from track.

CONS:- Loss of some 'authenticity' associated with the drum kit

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Live AUDIO Drums (Audio Drums)- Initially played by a drummer as a wave file. Machine/keyboard simply streams this audio file as was recorded from a source (SSD or HD) and plays.

PROS:- The most authentic 'drummer' you'll ever have. Entire drum set and ambient surrounding the drum kits is reproduced. KETRON provided the capability to vary the tempo of the audio drums with no change to pitch giving you some flexibility as to how you can use/synchronize them with styles and Midifiles.

CONS:- Either you like it as delivered or you hate it as there is minimum you can edit with the audio file. In the AUDYA series, you are giving a DRUM EQ which you can use to say select a particular frequency and increase/decrease it's db thus you can to some extend edit say the frequency that predominantly affects the snare drum, or kick drum ... etc and thus lower or increase the 'volume' of the 'snare' or 'kick', but you cannot replace individual drum instruments or change the audio track.

To compensate for this, KETRON allows you to record and use your own Audio drums with either factory styles, your user styles or midifiles!

Live Drums (Grooves) are used in:-
* SD1/SD1 Plus
* SD5/SD3
* SD7/SD40
* SD9 Pro (Drum 2 Track)
* AUDYA series (Drum 2 Track)

Live AUDIO Drums (Wave files) are used in-
* AUDYA series (Drum 1 & 2 Tracks)
* SD9 Pro (Drum 1 Track)

Hope this helps.

Thanks,