Ableton Live Intro Manual de Instruções descarregar pdf (Página 247)

CHAPTER 20. LIVE AUDIO EFFECT REFERENCE 245

There are four different lter types: lowpass, highpass, bandpass and notch. For each type,

the X-Y controller adjusts frequency (to adjust, click and drag on the X-axis) and Q (also

called resonance; to adjust, click and drag on the Y-axis). You can also click on the Freq and

Q numeric displays and type in exact values.

Low Q values create a broad lter curve, while higher values introduce a narrow, resonant

peak to the sound. With bandpass ltering, Q sets the bandwidth of the passed signal.

The Quantize Beat control applies quantized modulation to the lter frequency. With Quan-

tize Beat off, frequency modulation follows the control source. Turning this feature on

updates the lter modulation rhythmically with stepped changes that track the master

tempo. The numbered buttons represent 16th notes, so, for example, selecting 4 as a

beat value produces a modulation change once per beat.

The Envelope section controls how the envelope modulation affects the lter frequency.

The Amount control denes the extent to which the envelope affects the lter frequency,

while the Attack control sets how the envelope responds to rising input signals. Low Attack

values cause a fast response to input levels; high values integrate any changes gradually,

creating a looser, slower response. Think of it as adding inertia to the response.

Lower Release values cause the envelope to respond more quickly to falling input signals.

Higher values extend the envelope's decay.

Normally, the signal being ltered and the input source that triggers the envelope follower

are the same signal. But by using sidechaining, it is possible to lter a signal based on

the envelope of another signal. To access the Sidechain parameters, unfold the Auto Filter

window by toggling the button in its title bar.

Enabling this section with the Sidechain button allows you to select another track from

the choosers below. This causes the selected track's signal to trigger the lter's envelope

follower, instead of the signal that is actually being ltered.

The Gain knob adjusts the level of the external sidechain's input, while the Dry/Wet knob

allows you to use a combination of sidechain and original signal as the envelope follower's

trigger. With Dry/Wet at 100%, the envelope follower tracks the sidechain source exclusively.

At 0%, the sidechain is effectively bypassed. Note that increasing the gain does not increase

the volume of the source signal in the mix. The sidechain audio is only a trigger for the

envelope follower and is never actually heard.

The Auto Filter also contains a Low Frequency Oscillator to modulate lter frequency in a

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Vikinin 04 Jan 2024 | 12:03:19

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Ableton Live Intro Manual de Instruções Página 247