Apple Impulse Response Utility Bedienungsanleitung PDF herunterladen (Seite 31)

Tutorial

This section will walk you through the complete process of creating an impulse

response, from project start through to final Space Designer setting. For this tutorial,

imagine that you have permission to record in a particularly good-sounding local

concert hall. You have decided to record a discrete five channel surround impulse

response, as you’ll probably never have this opportunity again.

Creating a Five Channel Surround Impulse Response

Please follow the steps outlined below to create a discrete five channel surround

impulse response.

Step 1: Preparation: Microphone and speaker setup

The first thing you’ll want to do is set up your speakers and microphones. Imagine

you’ve decided to use the virtual listener approach—which requires five speakers and

at least one microphone in the middle—which can be turned towards each speaker in

turn. Ideally, you will have five identical, powered monitors. This will save you time

when recording audio, and will allow you to see all speakers at once, to ensure they are

each the same distance from the corners and walls, and so on. When all speakers have

been positioned, you need to set up your microphone in the middle of the hall. Make

sure everything is properly connected to your audio interface.

Step 2: Creating a new project

The next step is to open Impulse Response Utility and create a new five channel

impulse response project. The New Impulse Response Project dialog informs you that

this format requires five speaker positions and five mic positions. When you exit the

dialog, twenty-five audio tracks will appear in the Inputs/Tracks section—one for each

speaker position, from every microphone position.

Step 3: Configuring Impulse Response Utility parameters

Position your microphone towards the speaker you want to record (the left front

speaker, for example). Set up the Monitor section, sweep generator, and input for the

selected track.

Step 4: Recording

Record-enable the selected track, and click the Sweep button. Impulse Response Utility

will prompt you to name and save the new project after your first recording.

Swivel the microphone to the second surround position, record-enable the track, and

click the Sweep button. Once the recording has completed, the project will

automatically be saved in the background. You may want to play back the track in the

Editing area, just to double-check the recording.

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Apple Impulse Response Utility Bedienungsanleitung Seite 31