Claudiu,
Feel free to ask me any questions about the Casio WK-3500. You can either post here on the Zone or use my email address listed under my SynthZone profile.

Best Regards, (glad you're staying)
Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.