PSR-I455 Owner’s Manual
37
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Parameters Assigned to the Knobs
This section describes each of the parameters which can be assigned to the Knobs
(page 21).
z
TABLA/TANPURA
Knob A adjusts the volume balance between the
sounds of Tabla 1 and 2, while Knob B adjusts the
volume balance between the sounds of Tabla and Tan-
pura.
x
TABLA/TANPURA
Knob A adjusts the tempo of Tabla playback while the
Tanpura playback tempo is maintained. This follows
typical Indian music stylistic conventions. Knob B
raises or lowers the pitch of the Tabla/Tanpura sound
in semitones, with the exception of Tabla 1. This accu-
rately simulates the characteristics of the Tabla, in
which the lower sound is not affected by the tuning.
Note that also the pitch of Tabla 2 may not be changed
depending on the Tabla/Tanpura pattern.
c
FILTER
Filter effects shape the sound by allowing only a spec-
ified range of frequencies to pass and/or by producing
a resonance peak at the filter’s “cutoff” frequency. Fil-
ter effects can be used to create a range of synthesizer-
like sounds.
Knob A: CUTOFF
Adjusts the filter’s cutoff frequency, and therefore the
brightness of the sound. Turning the Knob to the left
makes the sound more muffled or darker, while turn-
ing the Knob A to the right makes the sound brighter.
Knob B: RESONANCE
Adjusts the amount of Resonance applied at the fil-
ter’s cutoff frequency. Turning the Knob to the right
will increases the Resonance to emphasize the fre-
quencies at the cutoff frequency, and thus “strength-
ens” the perceived effect of the filter.
v
EFFECT
Knob A: REVERB
Reproduces the acoustic ambience of a concert hall or
club. Turning the Knob to the right will increase the
Reverb depth.
Knob B: CHORUS
Produces a layered “multi-instrument” effect. Turning
the Knob to the right will increase the Chorus depth.
b
EG (Envelope Generator)
Envelope Generator effects determine how the level of
the sound varies over time. You can make the attack
faster for a more percussive sound or slower for a vio-
lin-like sound, for example. Or you can lengthen or
shorten the sustain to best match the music you’re
playing.
Knob A: ATTACK
Adjusts the Attack Time (the amount of time it takes
the sound to reach maximum level when a key is
played). Turning the Knob to the right will increase
the Attack Time, thus slowing down the attack rate.
• When Knob B is turned all the way left, only the pitch of the
Tabla 2 sound is raised abruptly by an octave. This is due to a
limitation in this instrument.
• These effects are applied only to the Main/Dual Voices played
on the keyboard.
• Filter effects can sometimes cause distortion in the bass fre-
quencies.
NOTE
NOTE
Level
Frequency
Cutoff Frequency
Frequencies in this
range are passed.
Frequencies in this
range are cut off.
• These effects are applied only to the Main/Dual Voices played
on the keyboard.
Level
Frequency
Resonance
NOTE
ATTACK
RELEASE
DECAY
Sustain Level
Level
Time
Key Played
Key Released
