Live Drums/Grooves and Live Audio Drums are created the same way ... a drummer playing an actual drum set. Differece is ... Live Audio Drums are not tuched once created - they are simply streamed as audio (*.wav) when used so styles with LIVE means 18 audio wave drums are assigned to each of the 18 arranger parts (Intro1, Intro2, Arranger A, B C ... etc).
This method gives you the BEST LIVE FEELING AS YOUR DRUMMER created it ... but also offers the LEAST CONTROL/EDITING capability as you are dealing with exclusive wave/audio files.

For Live Drums/Grooves, the recorded data is further treated/scliced into sections so that they (the sections) are triggered via MIDI. This type of kit allows for some kind of CONTROL and re-arrangement without loosing too much LIVE FEEL as you are dealing with wave files but slices/segments which individually can be controlled to some extent.

MIDI drums (as used by most other arrangers) are created as thus:- Drummer sits on a drum kit, sound guy says play KICK drum, he plays the kick and that is recored as "KICK.wav", next they say play the snare soft, drummer plays snare and it is recorded as "SNARE-soft.wave", other variation of the snare recorded as "SNARE-med.wave" and "SNARE-hard.wav" ... etc and drummer goes through entire drum set, and repeats this for different drum kits (or in the case of TECHNO, DANCE ... etc, samples are purchased or created in the studio). Now all these samples are put together under various drum sets and stored in the ROM/Wave table of each instrument (KETRON, YAMAHA, ROLAND) ... etc and the samples are 'triggered/recalled' by the style or Midifile or sequencer ... etc as needed. Because these are individual samples, you have more control over volume, reverb.. etc of each INDIVIDUAL notes, more flexibility to create your own drum tracks by triggering as needed ... etc but you LOOSE the LIVE FEEL of the drummer.

Hope this better explains it.

Thanks,
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[KETRON - USA]
Design Engineer & Product Specialist.
www.KetronAmerica.com