On occasions when I have been playing my X50 for a while, the sound alters, as if I have added reverb or something like that. I have to switch it off to get the 'original' sounds back. Sometimes that's enough but sometimes it happens again. I generally use a sound mix I have made but when it goes weird it's as if the piano goes kinda honky tonk.
Sounds like physical vibrations or electrical 'jitters' are causing the 'realtime control' knobs to shoot off values.
Possibly try setting them in a mode which doesn't affect what you are doing, like turning them to C mode where they affect the arpeggiator phrasing (when you're not using the arpeggiator). Or going into the controls page for a program and turning them all to 'off'.
Current Gear: Kronos 61, RADIAS-R, Volca Bass, ESX-1, microKorg, MS2000B, R3, Kaossilator Pro +, MiniKP, AX3000B, nanoKontrol, nanoPad MK II,
Other Mfgrs: Moog Sub37, Roland Boutique JX03, Novation MiniNova, Akai APC40, MOTU MIDI TimePiece 2, ART Pro VLA, Focusrite Saffire Pro 40.
Past Gear: Korg Karma, TR61, Poly800, EA-1, ER-1, ES-1, Kawai K1, Novation ReMote37SL, Boss GT-6B
Software: NI Komplete 10 Ultimate, Arturia V Collection, Ableton Live 9. Apple OSX El Capitan on 15" MacBook Pro
