In order to use Dirac Processor Plugin, you will need to download and install two components: Dirac Live® 3 (3.0.x) and the Dirac Processor Plugin (1.4.x). Dirac Live® 3 is used to measure and generate filters, while the Processor audio plugin stores the corresponding filters and processes audio data. 

Dirac Processor Plugin compatibility

The Dirac Processor Plugin package requires a plugin host compatible with VST2, VST3, AAX, or AU plugins. Compatible hosts include but are not limited to:

Download and Install Dirac Live® 3 and Dirac Processor Plugin

You can download Dirac Live and Dirac Processor Plugin here. Make sure that your computer is connected to the internet for licensing purposes.

Open the files and follow the installation procedures.

The Processor plugin will be placed in a folder according to the path below, unless you have made changes during the installation process:

Setup

Start your DAW and locate the audio plugin in the plugin menu. You might need to go through additional steps to activate the plugin, depending on your DAW.

Log in to you Dirac account if not already signed in.

There will be no filter stored in the audio plugin unless you have previously created new filters with the calibration tool.

Press the “play” button in your DAW to ensure that the audio stream is active while connected with the calibration tool. It is important that the audio stream is active during the whole calibration process. Here is a 30 minutes mp3 that you can use.

Run Dirac Live® 3

Select your device

Dirac Live will start with scanning the network for compatible devices that will store the filters and process audio data (such as AVRs or the Dirac Live processor audio plugin). You can click the “Rescan devices” icon in the upper left corner if you want to refresh the scanning result.

Please select “Dirac Live processor” and proceed. Do not select any AVRs. You want the Dirac Live Processor plugin to function as the device that stores the filters.

Select your recording device

Volume Calibration

Since the filter design algorithm requires that the speakers be measured with a moderate sound pressure level and a noise level as low as possible, it is crucial to do a level calibration of the system before measurement. The microphone should first be positioned in the center of the listening area. This is the "sweet spot." 

  1. Set the Mic gain to 100%, which is the point between the red and blue areas.
  2. The "Master output" level must be set to a low volume in order to avoid damage to your ears or speakers. If it is not already set to a low volume, drag the magnitude indicator to the lower part of the slider.
  3. Press the play button beneath the speaker located furthest to the left. The speaker should now play a stimulus in the form of a pink noise or, if the speaker is a subwoofer, short sine sweeps. If you cannot hear the stimulus, slowly raise the "Master output" level until you hear it.
  4. Repeat this procedure for all speakers. If there is no noise playing from one or more speakers, make sure that your device is configured to the correct speaker configuration and that your speakers are connected to the device. Ensure that the device's firmware is also properly recognizing each speaker.
  5. After you have confirmed that all speakers play stimulus, then play the stimulus from the furthest left speaker again. Ensure the sound pressure indicator indicates sound being played.
  6. Adjust the Master Output to a comfortable or slightly louder-than-normal listening level for Measurement and then proceed.

    1. If you receive a Signal-to-Noise Ratio error during Measurement, you will need to increase Master Output or decrease Mic Gain at the Volume Calibration stage.

    2. If you receive a Clipping error during Measurement, you will need to decrease Master Output at the Volume Calibration stage.


Remember that volume of the stimulus should never hurt your ears. There is a lock on the Master output slider for safety reasons. However, if you need to raise the volume into the red zone and are positive that your system can handle it, press the red lock that appears above the slider. You should now be able to drag the slider into the red area.

Select arrangement

There are three options available, please select “Studio”.

Measure

Potential problems and workarounds during the measurement

Filter Design

Edit target curves of frequency response

After completing the measurements, Dirac Live will automatically generate suggested target curve(s) for frequency response and the corresponding correction filters that are intended to enhance your sound system as much as possible. You can make fine adjustments to your preferences. The frequency response correction will be performed in real time so that you can see the correction result immediately and continuously make more adjustments.

Inspect impulse response correction result

Under “Filter design”, you can switch from “set target” to “impulse response” to view the impulse response correction result. Impulse response affects clarity, detail and all spatial aspects of the sound. Dirac Live’s unique impulse response correction can greatly improve staging, bass and clarity.

There is no need to adjust the impulse response yourself, as Dirac Live automatically optimizes it for the best possible result.

Filter export

The last step is to export the filter for a listening test. Select a slot and save under the desired name (there may be an auto-generated name, which can be replaced). When export is complete, the application will return to the Filter Design view. Remember to save your project before exiting the application.

After the filter is exported, the filter will automatically appear in the audio plugin. No other actions are needed to apply the filter to your audio stream.

General tips