Roland VS8F-3 Bedienungshandbuch PDF herunterladen (Seite 26)

Effect Algorithm

Stereo Reverb

This models the reflections and reverberation of a hall or room, as well as its spatial character. Since both input and output are stereo,

you can add reverberation without impairing the stereo image created by panning the input source.

COMP (Compressor)

If the input volume exceeds the specified threshold, this will compress the dynamic range of the output signal.

(*1) Auto Gain automatically adjusts the output level according to the settings of the Threshold (THRE) and Ratio (RATIO) parameters.

However, if the parameter of Attack Time (ATK) is set long, this cannot compress a peaky input and may cause distortion. For this

reason, a margin of -6 dB is provided. Adjust the LEVEL as required.

(*2) If you’ve set the TYPE parameter to TUBE1~TUBE4, the only setting available for the ATK parameter will be 1.0~800.0 ms, and the

SOFT KNEE parameter is set to ON.

Parameter (full name)

Setting Function

Sw (Switch)

OFF, ON Turns the compressor on or off.

TYPE

SOLID, TUBE1 ~TUBE4

(*2)

SOLID: A compressor using solid-state circuitry, with linear response

TUBE 1: A compressor using vacuum tube circuitry. Generates light, even-order harmonics

TUBE 2: A compressor using vacuum tube circuitry. Generates deep, even-order harmonics

TUBE 3: A compressor using vacuum tube circuitry. Generates light, odd-order harmonics

TUBE 4: A compressor using vacuum tube circuitry. Generates deep, odd-order harmonics

THRE (Threshold) -24.0~0.0 dB Sets the level at which the compressor starts taking effect.

RATIO 1:1.00~1:16.0, 1:

∞

Sets the compression ratio applied when threshold level (THRE) is exceeded.

ATK (Attack) 0.0~800.0 ms (*2)

Sets the time from when the input level exceeds the threshold level to when the effect begins

to be applied.

REL (Release) 50~8000 ms

Sets the time from when the input level drops below the threshold level (THRE) to when the

effect ceases to apply be applied.

SOFT KNEE OFF, ON (*2)

Softens the change in output level at the region of the input threshold (THRE) level

Off: Level will change immediately before and after the threshold (THRE)

On: Level will change over a curve in the region of the threshold (THRE)

A-GAIN (Auto Gain) OFF, ON Automatically compensates for the decrease in output volume caused by compression (*1)

LEVEL -24.0~24.0 dB Sets the volume of the compressor sound.

Input L

Input R

Output L

Output R

Compressor Expander

Stereo

Reverb

Sound types

Sounds around us can be analyzed and categorized into three types: direct sounds, early reflections

and reverberation. A direct sound is the sound that reaches the listener directly from the source. An

early reflection is the sound that has rebounded from the wall once, twice or several times. A

reverberation is the sound we hear after sound reflections are repeated many times.

Relationship between sound and time

Reflected sounds reach the listener in the following sequence. The pre-delay is the time

from when the direct sound is heard until the reverb is heard. The reverb time is the time

over which the reverb decays to silence.

Reverb sound quality

The sound quality of a reverb is affected by materials of the walls and other members from

which the sound is reflected. This is because the degree of attenuation in the High and Low frequency bands varies. HF-Damp Gain

and LF-Damp Gain are provided so that you can adjust such attenuation degrees. The smaller the value becomes, the steeper the

degree of attenuation of the reverberation becomes in the High and Low frequency bands.

In addition, in order to obtain softer reverberation, make the frequency lower by using HF-Damp Frequency. In order to obtain

harder reverberation, make the frequency higher by using the LF-Damp Frequency parameter.

Sound

source

Listener

Direct sound

Early reflections

Later

reverberation

Level

Direct sound

Time

Pre Delay

Reverb Time

Later reverberation

Early reflections

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