Critter&Guitari Bolsa Bass - Manual (Page 2)

MODES
The Bolsa Bass has six modes that can be changed using the Mode Key. The Mode LED indicates which
mode you have selected. Each mode uses the two knobs differently.
Circle Ramp
Downward ramping pure sine tone.
Knob 1: Ramp speed from very fast (<10 milliseconds) to very slow (1.5 seconds)
Knob 2: Starting point of the downward ramp. All the way to the right is no ramp, all the way to
the left is 2 octaves above.
Saw Ramp
Similar to Circle Ramp, but using sawtooth tone. The tone in this mode is actually a summation
of a sine wave and sawtooth wave. The added sine wave bulks up the tone for a ‘fatter’ sound.
Knob 1: Ramp speed from very fast (<10 milliseconds) to very slow (1.5 seconds)
Knob 2: Starting point of the downward ramp. All the way to the right is no ramp, all the way to
the left is 2 octaves above.
Analog Style
Classic resonant low-pass filter sound. A sawtooth wave is fed into the filter. The cutoff
frequency is keyed to the note being played, so with the resonance turned up its possible to
emphasize specific harmonics in each note played.
Knob 1: Cutoff frequency, relative to the note being played.
Knob 2: Resonance
Sweep Filter
Similar analog low-pass filter sound, but with a downward sweeping filter envelope.
Knob 1: Envelope time, from 10 milliseconds to 4 seconds.
Knob 2: Resonance
FM Pad
Dual oscillator FM synthesizer. Two frequency modulated oscillators are added together. The
harmonicity of each oscillator is controlled from a low frequency oscillator (LFO). The frequency
of the second FM oscillator is offset to provide further phasing in the harmonics of the note
played.
Knob 1: LFO rate and oscillator frequency offset. Turning this knob up increases the rate of the
phasing effect. Turn it all the way down to stop the oscillation.
Knob 2: Index of modulation. Turn this knob up to add more high frequency harmonics into the
sound.
Bass Delay
Tuned delay line. A quick impulse is fed through a delay line with controllable feedback and
delay time. The delay time is relative to the note being played which makes a string like sound.
Knob 1: Delay Time. Turn this knob all the way down to set the delay time equal to the period
of the note being played.
Knob 2: Feedback. Turn this all the way up to sustain the note indefinitely.
Knobs 1 & 2
These knobs control parameters in the synthesizer’s six modes. Their function is described below.