Basta leggere le specifiche
http://www.yamahasynth.com/products/synthesizers/motif_xf/#specification-anchor
"Voices
Preset: 1,024 Normal Voices + 64 Drum Kits
GM: 128 Normal Voices + 1 Drum Kit
User: 128 x 4 (Bank 1: original, Bank 2 – 4: selected and copied from Preset bank) + 32 Drum Kits (No. 1 – 8: original, No. 9 – 32: selected and copied from Preset bank) "
Quindi (salvando le voci "original") ne restano 128x3=384 + 24 DrumKits
PS: perchè non raggruppi le tue domande/dubbi su Motif XF in un solo thread al posto di aprirne 1 per domanda??