does this exist?

[joeq]

looking for a hardware device or software sequencer that will play a pre-programmed sequence of notes, IN ORDER = where each note is triggered by a separate MIDI event regardless of time spacing

in other words,
strike a key or a pad - hear the first note of the melody
strike the pad again hear the second note of the melody

etc etc

I guess another way of putting it would be: an arpeggiator where each midi event would advance the clock to the next tick.