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Troubleshooting
Kurzweil Support
7-5
Continuous Control (Expression) and Half
Damper Pedal Problems
Problem A Continuous Control (Expression) or Half Damper pedal is
not working correctly
Solution For best results, use a Kurzweil CC-1 Continuous Control pedal,
available from your dealer. See below for specications when
using Continuous Control pedals from other manufacturers.
A Continuous Control (Expression) or Half Damper pedal must be wired to a single stereo
1/4-inch plug as follows:
• Wiper to Tip
• Top end of resistance element to Ring
• Bottom end of resistance element to Sleeve
ese connections are shown schematically below:
Sleeve Ring Tip10KOhm Linear Taper
Increasing Foot Pressure
A continuous control pedal should have an impedance between 5,000 and 100,000 ohms.
An impedance less than 5,000 may overload the reference voltage source in the SP6 and
interfere with operation of other controls. An impedance more than 100,000 may result in
electrically noisy operation, which may cause your SP6 to send unwanted MIDI controller
messages.
e taper of the control should be linear for easy, predictable control. Pedals designed for
volume control typically have an exponential (or anti log) taper, which results in most of
their range being concentrated in the upper half of pedal’s path of travel.
Pedals may have a control range that is less than 100%. Make sure that when the pedal is
in the fully down position, its impedance is 0, and when it is in the fully up position, the
impedance is at its maximum rating.
Kurzweil Support
For additional help, contact Kurzweil support at kurzweil.com/support. You may also nd
unocial help at some of the internet communities listed at kurzweil.com/community.
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