Re: 'ello, keyboard problem...
I would recommend going with a 1/4" cable into a 1/4" -> 1/8" adapter, though. I have had no problems with 1/8" cables with 1/4" adapter going into recording interfaces, but when I try to plug said cable into an amplifier or PA system, I usually get distortion and the lows lose gain while the highs pick up a lot of gain. Perhaps it is just the brand of cable/adapter that I use, but it always happens. Never had it happen when using a 1/4" cable though.
"When I hear music, I fear no danger. I am invulnerable. I see no foe."- Henry Thoreau