no this isn't what you imagine, again. i didn't mention what you're describing.
i don't know how to say even more clearly. Whatever i'll play on the keyboard, once, will be recorded, but transformed. the only thing that will be recorded from the keyboard will be the each note height. that's all. then the arduino will play back each notes, each step, one by one, with the same spacing between each note. Is it more clear ?
then the tempo will be adjusted on the arduino by adjusting the spacing between each start of the notes played back. and the sequence played back is looped or not.
No no, all the stuffs i've seen or that you mentioned, all the softwares, none can do what i'm exactly looking for. i'm cloning the principle of the sequential pro one.
there's the doepfer sequencer, but to me it's crap. It adjusts the notes for each step, ok, but with a potentiometer. nothing comes from the keyboard. the soft versions i've seen propose some step sequencers or stuffs like that, but really not the interface i'm looking for, not fun at all, with the mouse etc ... quite close to the doepfer actualy.
look at the sequential pro one again, this is my quest, only in midi, to control an emu II or some other stuffs, on the run, after i set a cool sequence quickly. it's that simple :
the guy sets the sequencer to record what he's gonna play, whatever unconsistency he'll have, and then the pro one plays the sequence back, with a different constant, ( same lenght between each note recorded previously ) and also loops it if wanted. then the player hit a key and the sequence is transposed to this key. that's all. Not what you're describing or think i described.
another example, with an elka synthex i think, very 80'. imagine that the synth does da da da da da da da on the same note height , unless you transpose it, and here it is :
the machine works the sequence all by herself, all you're doing is transposing it with the same keyboard that has let you create the sequence that's being played. ( i'm not mentioning the mods applied to the sequence here again, but the main lines first )
And you're talking to a musician too, who builds vintage JTM45/100, blackflag, superleads, and guitars, basses, univibes, fuzz, octavia ... Echoplex repairs ..