HPF (High Pass Filter)			Roland JUNO-60 II. Functions for Sound Creating: HPF This filter lets the high frequency harmonics pass and cuts off the low frequency harmonics. As this filter is not voltage controlled, Cutoff Point is changed by only moving this knob. (1) FREQ · Cutoff Frequency knob This knob sets the Cutoff point of the HPF. In its lowest position, the DCO output passes the filter unchanged. As you raise the knob, Cutoff point will be boosted and only the higher harmonics are passed.
VCF (Voltage Controlled Filter)			Functions for Sound Creating: VCF This filter changes the tone color by cutting off or emphasizing harmonics. This filter lets the low frequency harmonics pass and cuts off the high frequency harmonics and is controlled by voltage. (2) FREQ · Cutoff Frequency knob This know is to change the Cutoff Point of the VCF. As you lower the knob, the frequency in the high pitch range will be cut off, and the sound will fade out when the waveform becomes nearest to a Sine Wave. (See Diagram) (3) RES · Resonance knob This control emphasizes the Cutoff Point set by Cutoff Frequency knob 2. As you raise the knob, certain harmonics are emphasized and the created sound will become more unusual, more electronic in nature. If you alter the Cutoff Frequency knob while the Resonance knob is set to a high level, you can create a type of sound that is attainable only from a synthesizer. If you raise the Resonance knobup to the maximum, the VCF will start Self Oscillation. (4) ENV · Envelope Modulation knob When the Cutoff point of the VCF is being modulated by the output of the Envelope Generator, this knob is used to adjust the intensity of the modulation. You can chnge the Cutoff point of the VCF in each note with the ADSR pattern previously set. So the tone color of one note can be changed quite drastically. (5) Polarity switch This is the selector switch for the polarity of the Envelope. When it is set at reverse polarity, the ADSR pattern will be reversed and the tone color alteration will be the other way round. This often means the Cutoff Frequency of the VCF (HPF) will need to be set higher. (6) LFO · LFO Modulation knob When the Cutoff Point of the VCF is being modulated by the output CV of the LFO, this knob adjusts the depth of the growl or wah effects. (6) KYBD · Key follow knob When the Cutoff Point is being controlled by the KYBD-CV (Keyboard Control Voltage), this knob adjusts the level of the KYBD-CV. It prevents any inconsistency in the harmonic content caused by pitch alteration. Consequently this knob is usually set to maximum on such a long keyboard, but can be set to your taste. NOTE: The Self Oscillation of the VCF does not guarentee an accurate pitch. Therefore, you cannot expect a correct scale when playing the keyboard. If using the VCF Self Oscillation as a sound source, its pitch may turn out unstable. In such a case, move the position of the FREQ knob until you get a stable pitch. (If you store it into memory and use it later, its pitch will be stable.) [ Diagram ] << Table of Contents | Next (VCA) >>