Yamaha SPX990 Manual download pdf (Page 31)

GATE

The reverb time of SPX990 can be set at a max. time of

480sec. When combines with GATE, this reverb time which

remains long can produce a sound that has a short fade-out

effect. The "GateRev" effect applies the early reflection while

the reverb effect combines with GATE applies the reverb

sound to produce a better sound quality and sharper sound by

cutting the reverb sound halfway. Thus the combination of the

reverb effect and GATE can provide us the convenience of

many usages. GATE is a kind of switch which controls the

signal input and opening and closing of the gate . Thus, the

gate is opened when the signal passed through and closed

when the signal is cut.

TRIGGER

The gate will opened by any triggers. The trigger is mainly

the strength of signals. The gate opens to let the signal pass

when the signal strength is higher than a certain level and

closes to stop the signal when the signal strength is lower than

the level. TrigLvl can determine the level.

Hold and Release

A sound with the very short signal will pass the gate at a

small level immediately if it exceeded TrigLvl and the gate

will be open only during that time. During the time of Hold,

however, the gate can remain open even after the strength gets

weaker. If the signal strength remains stronger than a certain

level, it works as a re-trigger and the gate can also remain

open during the time. Also, the time when the gate starts to

close and when it closes completely can be set longer for the

slow fade-out sound. This can be done by the Release

function.

OTHER TRIGGERS

Triggering by signal strength is not the only way to open the

gate but a trigger by foot switch connected to the trigger

terminal on the rear panel and a trigger by MIDI NOTE ON

are other ways. For instance, if TrgLvl = 100 is set, signal

cannot be transmitted as the trigger does not work even if a

strongest signal comes. But if MIDI NOTE ON signal is sent

or the TRIGGER ON operation is done by foot switch, the

gate will open during the time set by Hold to let the signal be

transmitted. At this moment the setting of Release is also

effective.

MidiTrg must set at ON if you use a trigger from MIDI.

TrgDIy

When the parameter TrgDly is set at 0, the gate opens after

the initial delay since the input signal exceeds TrgLvl. When

TrgDly > 0, the gate opens after the time prior from the initial

delay.

A setting of minus value for TrgDly will open the gate before

the initial delay. This is effective for slow-starting input.

When TrgDly is minus value and the absolute value is bigger

than that of the initial delay, the gate opens before the signal

level reaches TrgDly by letting the signal sound itself be

delayed.

NOTE: When TrgDly is set at 0, the gate will always remain

open. Here, other trigger sources (TRIGGER FOOT

SWITCH, MIDI NOTE ON) are not effective.

If triggers occur continuously from other trigger sources when

the TrgDly is higher than a certain level and the gate is

closed, the gate may remain open because the gate is control-

led by other trigger sources and the opening time of the gate

is determined by setting of Hold, therefore if a trigger is done

during the Hold time it is considered as a re-trigger and the

gate will remain open by continuous triggers.

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Yamaha SPX990 Manual Page 31

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