Gabriele
The Midijay reads styles from internal Memory and directly/instantly from HD. If you copy all the SD1 styles into the HD (Style folder), you can instantly play them directly from the Midijay. In theory, you can hold about 9,999 styles in the STYLE folder of the Midijay ... so you see, that is a little bigger than the Sd1. The only thing is you cannot CREATE NEW PATTERNS on the Midijay (no PATTERN EDITOR), so if you can live without this, the Mididay is definately for you.
Thanks,
AJ