Kurzweil K2000 - Noise Reduction and Audio Level Optimization; Optimizing Audio Levels for Signal-to-Noise; Ground Hum Issues and Solutions

MAINTAIN.PUB 1l/OV92
SECTION 4
4.4.10
4.4.11
4.5
4.5.1
4.5.2
4.5.3
there is often an adjustment on the pedal that might correct
that. The only solution for a highly nonlinear pedal is
replacement of the potentiometer (which probably has a so-called
"audio taper") with one that has between 10K and lOOK of
resistance and a "linear taper".
As seen, the diagnostic program can also be used to check out
the built-in panel and performance controls of the K2000. Like
the Controller Slider, moving either wheel or pressing on the
keyboard will show a controller name and reading between 0 and
255. If you move the Alpha Wheel clockwise, the numbers will go
0-1-2-3-0-1-2 •.. while counterclockwise should produce 3-2-1-0-3-
2 ... If you press a button, its name will be shown and if it is
one of the mode buttons, its associated LED should flash.
The third line of the display shows the results of two
measurements that are made whenever your K2000 is turned on.
The battery voltage will be about 4.5 volts for new batteries
gradually declining over time to 3.2 volts, at which point you
will begin to receive warnings (see "BATTERY SELECTION AND
REPLACEMENT" above). The wheel referred to is the spring-
centering software will work perfectly. If it is outside that
range, the wheel will still be automatically centered but you
may not get the full control range in one direction. Please see
your Kurzweil/Young Chang dealer for any needed wheel
adjustments.
MAX~ZING MUSIC AND McrN~ZING NOISE
The K2000 quite possibly has the lowest noise and widest dynamic
range of any instrument in the industry. The following tips
will enable you to make the most of this, and optimize the
K2000's audio interface to your other equipment.
Setting your audio levels appropriately is the key to optimizing
the signal-to-noise ratio of any piece of equipment. you may
have noticed that the K2000's output signal seems less "hot"
than most other synths when using the unedited factory sounds.
This is to allow virtually any configuration of voice assignment
to be used (up to 96 oscillators directed to one output!), and
played very loudly with almost no chance of overload distortion.
For more controlled adjustments, it is best to increase the
output level digitally (by editing programs) instead of
increasing the gain of your amplifier or mixing board. This is
because a digital gain increase is completely noiseless whereas
an analog increase will proportionally increase hum and noise
from the connecting cabling and from the K2000 itself.
Increasing the volume digitally can be accomplished in three
ways. You can increase the volume of all programs assigned to a
given MIDI channel by selecting the CHANLS page in MIDI mode and
setting the OutGain parameter to the desired level (in 6dB
steps). For multi-tirnbral sequences (on multiple MIDI
channels), you will need to do this for each channel.
Alternatively you can increase the volume of a single program by
going to the OUTPUT page in the Program Editor and setting the
Gain parameter to the desired level, again in 6dB steps. For
finer adjustment, the Adjust parameter on the F4 AMP page can be
used.
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