Roland BK-5 用户手册

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Mastering Tools
Backing Keyboard BK-5 
r
71
Mastering Tools
The BK-5 contains an effects processor that applies to 
all real-time, rhythm and SMF song parts.
This processor is called “Mastering Tools”, because it 
allows you to perfect the signal mix to adapt it to the 
sound system you are using. 
The parameters discussed here can be selected using 
[MENU] button ‰ “Mastering Tools”.
Compressor
This multi-band compressor/limiter allows you to pro-
cess three frequency ranges separately. A compressor 
reduces high levels (peaks) and boosts low levels, 
smoothing out fluctuations in volume.
To edit the Compressor parameters, use [MENU] button 
‰ “Mastering Tools” ‰ “Compressor”.
1.
Select a keyboard part, an SMF song or a 
rhythm and start playback.
2.
Set the “Switch” parameter to “On” to acti-
vate the compressor.
The compressor is now active. (Select “Off” to switch 
the compressor back off.)
3.
Use the [CURSOR÷VALUE] dial to select the 
“Preset” parameter, then press the [ENTER/
SELECT] button.
4.
Rotate the [CURSOR÷VALUE] dial to select 
one of the available presets.
The available presets are:
5.
If none of the preset memories contains the 
settings you need, press the [ENTER/SELECT] 
button to select and set the following 
parameters:
1. Hard Comp
2. Soft Comp
3. Low Boost
4. Mid Boost
5. High Boost
6. Standard
7. User
Parameter
Setting
Explanation
Level
0~127
Use this parameter to set 
the compressor’s input level. 
The higher the value, the 
stronger the three frequency 
bands are compressed.
The value you set here is 
added to the “Level” settings 
of the three bands. Do not 
set this parameter to “0” if 
the compressor is switched 
on, because doing so means 
that the keyboard parts, the 
SMF song or Rhythm parts 
are no longer audible. 
Gain
–12~0~
12dB
Use this parameter to cor-
rect the level at the com-
pressor’s outputs. If the 
settings of the remaining 
parameters lead to a signifi-
cantly lower level, select a 
positive value. If your set-
tings lead to a significantly 
higher level, select a nega-
tive value. “0” means that 
the level is neither boosted 
nor attenuated. 
High/Mid/Low: Because “Attack”, “Release”, “Threshold”, 
“Ratio” and “Level” are the same for each band, we will 
only discuss them once. As you see, each of the three fre-
quency ranges has its own set of parameters that allow 
you to specify their behavior.
Attack
0~100ms
Use this parameter to spec-
ify how fast the compressor 
of the band in question 
should start processing the 
signal once the level of that 
band exceeds the “Thresh-
old” level. Choose a smaller 
value if you prefer a com-
pression similar to that of 
FM radio stations. Higher 
values may yield a “snap-
pier” or “funkier” sound.
Release
50~
5000ms
This parameter allows you to 
specify how fast the com-
pressor of the corresponding 
band should stop working 
when the signal level drops 
below the “Threshold” value.
BK-5_US.book  Page 71  Monday, November 14, 2011  12:43 PM