I bought a CGP 700 series piano that I use to gig with. The sustain pedals, I have 2, the one that came with the unit and the one I have used for years, an M series. On every keyboard I have ever had when using the sustain pedal the sound has faded, this keyboard does not. The sound stays at one level and when you release the pedal it cuts off abruptly. Is there a work around to this? If not I will have to return this keyboard. These pedals are single pedal units, It sustains and fades with just voice one ,piano, but if i add a second voice such as strings it will not fade.