Roland SYSTEM-500 Complete Set Parameter Guide

The Parameters of the 521

The 521 is a module containing two VCF (Voltage Controlled Filter) blocks.

521

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SIG IN 1/2/3

These jacks input audio signals.

FREQ (Cuto frequency)

Adjusts the cuto frequency of the lter (Low Pass Filter).

* At a setting of 10, the original waveform passes

through without change. As you lower the value, less
of the high-frequency region passes through.

HPF (High pass lter)

Adjusts the cuto frequency of the HPF (High Pass Filter).

* At the OFF setting, the original waveform passes

through without change. As you raise the setting to 1
or 2, the cuto frequency rises, allowing only the high­frequency portion of the signal to pass through.

MOD IN KEY/2/3

These jacks input a voltage that controls the VCF color.

SIG IN level controls

These sliders adjust the level of the signals that are input
from the SIG IN jacks.

RES (Resonance)

Boosts the frequency components in the region of the
cuto frequency.

* By raising the resonance you can make the VCF

oscillate. You can use this as an audio source for sound
eects, or use KYBD CV to control the VCF and play
pitches from the keyboard.

OUT

These are output jacks. These jacks output the signal
from the VCF.

Attenuator for CV input 2/ 3

These sliders adjust the gain of the voltage that is input
from the MOD IN KEY/2/3 jacks.

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