quoted from Scythes of Bodom
" The keyboard itself doesn't matter very much to Janne. He uses X5, X3, M1, DX7, XP50.. the sound source is controlled via midi by the keyboard (there isn't much more info available due to the lack of endorsements).
On live gigs Janne often relied on his trusty good ol' X5. It was easy to carry around but it has it's drawbacks aswell : Some of the keys and buttons are missing and some of them are broken. Also the modulation wheel is gone.
The X5 is full of stickers which say things like "Warmen", "EPÄKUNNOSSA" (=out of order) and it's also packed with tape so that it wouldn't fall completely apart.
Recently he, however, got a brand new keyboard."