Roland Acoustic Chorus AC-60 Owner's Manual page 8

Names of Things and What They Do
Phantom Power
Because they have a comparatively wider range and better
sound quality than dynamic mics, condenser mics are often
used for miking acoustic guitars. However, they require a
power source to operate. Although some condenser mics run
off batteries placed within the mic housing, in many cases a
type of power supply known as "phantom power" is
required. This power supply uses the existing mic cable to
feed power.
The AC-60's phantom power is output at a constant 48 V, so
it conforms to professional specifications required at
recording studios.
5. SELECT button
This switches the input level to match that of the connected
device (mic or line).
You can connect guitars with magnetic pickups when LINE
is selected with the SELECT button.
* Note that the volume is increased if the switch is set to "MIC"
when you have a line-level device connected.
6. VOLUME knob
* When using the AC-60 with the GUITAR channel and MIC/
LINE channel mixed, adjust the volume balance between the
two channels with the VOLUME knob.
(GUITAR CHANNEL)
This adjusts the volume of the GUITAR channel.
* To accommodate the lower output of piezo pickups, the volume
level when the VOLUME knob is between the 7 and 10
positions is set somewhat higher when the PICKUP button is
set to PIEZO in comparison with the MAGNETIC setting.
(MIC/LINE CHANNEL)
This adjusts the volume of the MIC/LINE channel.
7. BASS knob
This adjusts the level of the low-frequency range.
Turning the knob to the right (clockwise) emphasizes the
feeling of body in the sound.
8. MIDDLE knob
This adjusts the level of the midrange.
Turning the knob to the right creates a fatter sound when
melodies or individual notes are played.
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9. TREBLE knob
This adjusts the level of the high-frequency range.
Turning the knob to the right emphasizes brushing sound
when chords are stroked.
The tone of acoustic instruments varies immensely from one
instrument to the next. The kind of sound required also
varies according to how an instrument is being used in a
particular ensemble. Actively use the BASS, MIDDLE, and
TREBLE knobs to adjust the tone to suit the instrument you
are using and the conditions in which it is being used.
(Example)
• When using the AC-60 with the speaker stand attached,
you may want to turn up the BASS knob so the lower
range is perceived better.
• If the sound seems too harsh, such as immediately after
changing strings, you may want to turn down the
TREBLE knob to cut back on the high frequencies.
10. CHORUS button
This turns the chorus on and off.
The indicator lights up when this is on.
You can use a foot switch (the optional BOSS FS-5U) to
switch the chorus on and off. Turning the chorus on and off
with the foot switch works on both channels.
11. CHORUS knob
You can switch between the three types of chorus (SPACE,
RICH, and WIDE) by setting this knob.
You can adjust the amount of effect applied by changing the
position of the knob.
* This is enabled when the CHORUS button is in the ON
position.
* The markings indicating the SPACE and RICH positions are
approximate. Listen to the sound to confirm the effect as you
make adjustments.
SPACE
This is a spacially synthesized chorus. With spacially
synthesized chorus, a method available only in stereo, the
chorus effect is created by taking the sound from the right
speaker, from which the effect sound is output, and the
sound from the left speaker, which outputs the direct sound,
and then mixing them in the actual space. This creates a
greater lateral spread than that produced when the sounds
are mixed electronically, providing a more natural sense of
breadth.