Ableton Live - 9.0 Manual do Utilizador descarregar pdf (Página 377)

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377 Live Instrument Reference

24.1.2 Oscillators

Display and Shell Parameters for the two Oscillators.

Analog’s two oscillators use physical modelling to capture the character of vintage hardware

oscillators. Because they use modelling instead of wavetables, they avoid aliasing.

Each oscillator can be turned on or off independently via the switch labelled Osc 1 or Osc 2 in

the shell, and the oscillator’s output level is adjusted by the slider to the right of this activator.

The F1/F2 slider controls the balance of the oscillator’s output to each of the two ﬁlters. When

the slider is at the center position, equal amounts of signal will be sent to both ﬁlters. When set

all the way to the top or bottom, signal will only be sent to Filter 1 or Filter 2 respectively.

The Shape chooser selects the oscillator’s waveform. The choices are sine, sawtooth, rectangu-

lar and white noise. When rectangular is selected, the Pulse Width parameter is enabled in the

display, which allows you to change the pulse width of the waveform. Low Width values result in

a very narrow waveform, which tends to sound tinny or “pinched.“ At 100%, the waveform is a

perfect square, resulting in only odd harmonics. The pulse width can also be modulated by an

LFO, via the slider next to Width. Note that this parameter is only enabled when the correspond-

ing LFO is enabled.

The Octave, Semi and Detune knobs in the shell function as coarse and ﬁne tuners. Octave

transposes the oscillator by octaves, while Semi transposes up or down in semitone increments.

The Detune knob adjusts in increments of one cent (up to a maximum of three semitones (300

cents) up or down).

Oscillator pitch can be modulated according to the settings of the Pitch Mod and Pitch Env pa-

rameters in the display. The LFO slider sets the amount that the LFO modulates pitch. Again, this

parameter is only enabled if the LFO is on. The Key slider controls how much the oscillator tuning

is adjusted by changes in MIDI note pitch. The default value of 100% means that the oscillator

will conform to a conventional equal tempered scale. Higher or lower values change the amount

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