Roland BR-864 owner manual Compressor, COSM Comp compressor/Limiter, De-esser, Defretter

-50–+50

Insert Effect Parameter Functions

Pre Dly 0.5–50.0 ms

Adjusts the time needed for the effect sound to be output after the direct sound has been output.

E.Level 0–100

Adjusts the volume of the effect sound.

Compressor

This corrects differences in input to create a steadier, more even volume balance. This is used to extend the sustain of input sounds and, conversely, to shorten sustain and emphasize the attack portion of sounds.

Another use of compression is as a “limiter,” which prevents distortion by suppressing only volume peaks.

On/Off OFF, ON

This parameter turns the compressor effect on/off.

Sustain 0–100

This adjusts the depth of the effect. Higher settings values result in longer sustain times. Set this to a lower value when using compression for the limiter effect.

Attack 0–100

Adjusts the strength of the attack. Larger values will result in a sharper attack, creating a more clearly defined sound.

Level 0–100

Adjusts the volume.

COSM Comp (compressor)/Limiter

The compressor corrects differences in input to create a steadier, more even volume balance. It is used to extend the sustain of input sounds and, conversely, to shorten sustain and emphasize the attack portion of sounds.

The limiter is an effect that prevents distortion by suppressing input signals that exceed a set value (threshold). You can get the same effect achieved with the compressor by setting the threshold at a low value. The BR-864 uses COSM technology to model four types of compressor/limiter in which the compressor and limiter functions are combined.

On/Off OFF, ON

Sets the compressor/limiter to ON or OFF.

Type

Selects the compressor/limiter type.

BOSS-Cmp:Models the BOSS CS-3 compact effects processor.

D-Comp:Models the MXR dyna comp.

Rack160: Models the dbx 160.

VtgRack: Models the UREI 1178.

Attack (with BOSS-Cmp, D-Comp) 0–100

Adjusts the strength of the picking attack when the strings are played. Larger values will result in a sharper attack, creating a more clearly defined sound.

Sustain (with BOSS-Cmp, D-Comp) 0–100

Boosts low-level signals, adjusting the time over which sounds are sustained. Higher values deepen the effect, resulting in a longer sustain.

Threshold (with Rack160) 0–100

Adjust this as appropriate for the input signal from your bass. The compression effect is applied to input above the level set here. The smaller the value set here, the lower the level at which the limiter effect kicks in.

Input (with VtgRack) 0–100

Controls the input level. Increasing the value will produce a deeper effect.

Ratio (with Rack160) 1:1–20:1, INF:1 (with VtgRack) 4:1–20:1

Adjusts the limiter compression ratio. Higher ratio create a stronger compression effect.

Attack Time (When set to VtgRack) 0–100

This adjusts the amount of time it takes for the compression ratio set in Ratio to be reached once compression begins, as the input level exceeds the set threshold level. The larger the value set here, the more rapidly compression is applied.

Release Time (with VtgRack) 0–100

This adjusts the time from when the signal level drops below the threshold until when the compression is removed. The lower the values set, the more rapidly the compression is released, and the more clearly the sound from the next string played is heard.

Tone (with BOSS-Cmp)

Adjusts the tone. The higher the value set, the more the high frequencies are boosted, resulting in a harder sound.

Level	0–100
Adjusts the volume.

De-esser

Useful for reducing ‘sibilant’ or ‘S’ sounds produced by a vocalist.

On/Off OFF, ON

This parameter turns the de-esser effect on/off.

Sibilant 0–100

Adjusts the sensitivity relative to the input volume, which controls how the effect is applied.

Level 0–100

Adjusts the volume.

Defretter

This simulates a fretless bass.

On/Off OFF, ON

This parameter turns the defretter effect on/off.

Sens 0–100

This controls the input sensitivity of the Defretter. It should be adjusted for the bass guitar you have until you get the harmonic changes to sound natural.

Attack 0–100

This controls the attack of the Defretter. Increasing the value will cause the harmonics to change more slowly, thus producing a relatively attack-less sound, similar to a fretless bass.

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