Yamaha PSR-I455 Owner's Manual - Page 37

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 Tanpura. 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 accurately 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. NOTE • 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. c FILTER Filter effects shape the sound by allowing only a specified range of frequencies to pass and/or by producing a resonance peak at the filter's "cutoff" frequency. Filter effects can be used to create a range of synthesizerlike sounds. NOTE • 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.  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 turning the Knob A to the right makes the sound brighter. Level Cutoff Frequency  Knob B: RESONANCE Adjusts the amount of Resonance applied at the filter's cutoff frequency. Turning the Knob to the right will increases the Resonance to emphasize the frequencies at the cutoff frequency, and thus "strengthens" the perceived effect of the filter. Level Resonance Frequency 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. NOTE • These effects are applied only to the Main/Dual Voices played on the keyboard. 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 violin-like sound, for example. Or you can lengthen or shorten the sustain to best match the music you're playing. Level Sustain Level ATTACK DECAY RELEASE Time Frequencies in this range are passed. Frequency Frequencies in this range are cut off. Key Played Key Released  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. PSR-I455 Owner's Manual 37 Reference