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Alchemy VA element controls in Logic Pro for Mac

Source components are shown only in advanced view. Click the Advanced button to switch to advanced view, then click the A, B, C, or D button to select the source you want to edit.

The parameters in this section are shown when the VA (Virtual Analog) button is active in a source subpage.

Figure. Virtual analog element parameters.

Virtual Analog parameters

  • Waveform display: Shows real-time changes to the waveform.

  • Oscillator On/Off button: Turn the main oscillator on or off. When you click the Name bar File button, and choose Initialize Preset from the pop-up menu to initialize Alchemy to default settings, the VA element is automatically turned on.

    Important: Use of Initialize Preset automatically turns on wide unison mode. See Alchemy wide unison mode.

  • Wave pop-up menu: Choose an oscillator waveform. Basic saw, sine, square, and triangle and many specialized waveforms are provided. You can also step through the available waveforms with the Previous and Next buttons (the arrows).

  • (Oscillator) Vol knob: Set the output level of the oscillator. When multiple elements are used in a source, use this control to set the relative level of the oscillator component.

  • Sym knob: Alter the symmetry, or shape, of the oscillator waveform. When a square wave is active, Symmetry acts as a pulse width control. The effective range is between 5% and 95% because extreme values may cause sonic artifacts.

  • Phase knob: Set the oscillator start point (phase). Values from 0% to 99.9% set a fixed start point for the oscillator. A value of 100% causes random variations of the waveform start point each time the oscillator is triggered.

  • Sync knob: Turn on oscillator sync and set the pitch that the main oscillator is synchronized with.

  • Num(ber) knob: Set the number of unison voices.

  • Detune knob: Set the amount of detuning and stereo width variance between unison voices or detuning between oscillators when wide unison mode is turned on. See Alchemy wide unison mode.

  • Noise On/Off button: Turn the noise oscillator on or off.

  • Noise pop-up menu: Choose a noise waveform. These have different spectral characteristics that can be further refined with filters. You can step through the available waveforms with the Previous and Next buttons (the arrows).

  • (Noise) Vol knob: Set the output level of the noise oscillator. When multiple elements are used in a source, use this control to set the relative level of the noise component.

  • Low Cut knob: Set a low cutoff frequency for the noise oscillator. All frequencies above this value are allowed to pass. All frequencies below are removed.

  • High Cut knob: Set a high cutoff frequency for the noise oscillator. All frequencies below this value are allowed to pass. All frequencies above are removed.

    The Low Cut and High Cut parameters work in conjunction with each other to act as a bandpass filter, where the noise signal that falls within the two cutoff ranges is allowed to pass.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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