Hi Trident,
the Live Drums in my SD1+ has had me rather intrigued for quite a while.
The Sd can play 3 types of drums.
It has the normal set of midi drum kits like your Brush kits , Jazz kits, Standard Kits etc etc

It can also use USER audio drum loops in styles & midifiles ie 1 bar 2 bar etc audio drum loops ( ie Drums on Demand, you could even use BIAB's Real Drum audio loops with some editing) . These drum loops are loaded into the sd1 sampler, processed & can be used to replace the midi drums in a style or midifile. They keep in sync even at different tempo's ie the loop may be recorded at 80 bpm, the style may be 100bpm, the loop will play back correctly at the 100bpm speed.
Just say you have a simple 1 bar audio drum pattern like 1& 2& 3& 4&
Beat 1 bass/hihat 1& hihat
Beat 2 rimshot/hihat 2& hihat
Beat 3 bass/hihat 3& hihat
Beat 4 rimshot/hihat 4& hihat
The SD1 just loops this audio file & plays it back in sync with the style part.

Next up you have the Live Drums. From what I gather, these are a mix of audio & midi technology. & they are Rom based.
I have a feeling that they may work in a similar manner to my pa800 grooves, except that the PA800 grooves are user based audio loops wheras the Ketron Live Drum audio loops are rom based.

With the PA800 I load in a drum audio loop,
( same as for the sd1) process it. This is where they differ.
The PA800 slices the loop into segments & gives each segment a midi note no.

Beat 1 bass/hihat C1
1& hihat C#1
Beat 2 rimshot/hihat D1
2& hihat D#1
Beat 3 bass/hihat E1
3& hihat F1
Beat 4 rimshot/hihat F#1
4& hihat G1

If I leave the midi note track as is, the pattern will play back identically to what the sd1 loop would have played back,
but if I choose to edit it,
Beat 1 bass/hihat C1
1& hihat C#1
Beat 2 rimshot/hihat D1
2& hihat D#1
Beat 3 rimshot/hihat D1
3& hihat F1
Beat 4 bass/hihat C1

I can alter the pattern to a certain degree.
Doesn't make much sense to do it with a 1 bar loop, but if you strung a number of varied audio loops together, & sliced, you could come up with some interesting new rhythms.

This is the way I think the Live Drums work.
Ketron have used a multi bar rom based audio loop, that has been sliced. Each of the slices is assigned a midi note no. Certain midi notes trigger different slices of the loop.

Most of the Ketron SD1+ styles use a Live Drum Set & one of the midi drum sets ie in a Jazz brush style the Live Drums play the Brushes Swishes & Bass Drum, the Midi Drum set plays the hihats, cymbals, ride drums etc
this way the Live Drum track can be used thruought the style ( including some of the intro's & Endings, wheras the Midi drum kit provides the variety between the variations by adding cymbal crashes or altering the hihat rhythm etc.

Hope to do something similiar with audio loops for my PA800. Just a case of finding suitable drum loops.

best wishes
Rikki

[QUOTE]Originally posted by trident:
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