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Backing Keyboard BK-5
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in the negative direction, the fewer overtones will be
allowed to pass and the sound will become softer
(darker).
NOTE
For some sounds, positive (+) “Cut Off” settings will cause
no noticeable change because the preprogrammed “Cut
Off” parameter is already set to its maximum value.
Resonance
This is a parameter one invariably associates with a
synthesizer. When the “Resonance” value is increased,
the overtones in the area of the cutoff frequency will
be emphasized, creating a sound with a strong char-
acter.
NOTE
For some sounds, negative (–) “Resonance” settings may
produce no noticeable change because the resonance is
already set to the minimum value.
The following parameters allow you to set the
sound’s “envelope”. The envelope parameters affect
both the volume (TVA) and the filter (TVF). The cutoff
frequency will rise as the envelope rises and fall as
the envelope falls.
Attack (T)
This parameter adjusts the onset of the sound. Nega-
tive values speed up the attack, so that the sound
becomes more aggressive.
Decay (T)
This parameter adjusts the time over which the
sound’s volume and cutoff frequency fall from the
highest point of the attack down to the sustain level.
NOTE
Percussive sounds usually have a sustain level of “0”. Piano
and guitar sounds are in this category. Holding the keys for
a long time will have little effect on the duration of the
notes you are playing, even if you select a high value here.
Release (T)
This parameter adjusts the time over which the sound
will decay after the note is released until it is no
longer heard. The cutoff frequency will also fall
according to this setting.
NOTE
Some sounds already contain natural (sampled) vibrato
whose depth or speed cannot be changed.
Use the following three parameters if you think the
instrument in question has too much (or could use a
little more) vibrato.
Vibrato Rate (T)
This parameter adjusts the speed of the pitch modu-
lation. Positive (+) settings make the preset pitch
modulation faster, and negative (–) settings make it
slower.
Vibrato Depth (T)
This parameter adjusts the intensity of the pitch
modulation. Positive (+) settings mean that the
“wobble” becomes more prominent, while negative
(–) settings make it shallower.
Vibrato Delay (T)
This parameter adjusts the time required for the
vibrato effect to begin. Positive (+) settings increase
the time before vibrato will begin and negative set-
tings (–) shorten the time.
Mfx
The BK-5 contains 2 multi-effects processors (“Mfx”),
one reverb processor and one chorus processor that
can be used to process rhythms or Standard MIDI
Files.
Select “Off” for instruments that don’t need to be
processed by any Mfx.
NOTE
If you select “A” or “B”, additional parameters can be edited
(see below).
Parameter Setting
Cut Off -127~+127
Parameter Setting
Resonance -127~+127
Parameter Setting
Attack -127~+127
Parameter Setting
Decay -127~+127
Characteristics of a low-pass filter
Cutoff frequency
Frequency
Setting
Parameter Setting
Release -127~+127
Parameter Setting
Vibrato Rate -127~+127
Parameter Setting
Vibrato Depth -127~+127
Parameter Setting
Vibrato Delay -127~+127
Parameter Setting
Mfx Off, A, B
BK-5_US.book Page 77 Monday, November 14, 2011 12:43 PM