Apple Impulse Response Utility User Manual Page 1

Impulse Response UtilityUser Manual

10 Configuring the Monitor Controls Once you have recorded sine sweep tracks into Impulse Response Utility, you can monitor them through a stereo out

11 Configuring the Sweep Generator The sweep generator produces a sine wave that sweeps smoothly up from 20 Hz to 20 kHz. The sweep generator paramet

12 Reverb Time The Reverb Time parameter determines the maximum recording time for each track. In order to accurately capture the acoustic properties

13 Recording Audio Into Impulse Response Utility Once you have selected your hardware assignments, and configured the monitor and sine sweep sections

14Â Mic Position menu: Selects the mic position label for the selected track. Both Impulse Response Utility and Space Designer use these labels to id

15VU MeterImpulse Response Utility offers a VU meter that measures either; the signal level present at the (soloed) track input, or the sweep generato

16Deconvolving Your Impulse ResponseIf you use the sweep generator, you will need to deconvolve your audio recordings—in order to make them usable as

17Editing and Auditioning Your Impulse ResponseOnce you have recorded (or deconvolved your recorded tracks into) impulse responses, you can use the Ed

18Transport ButtonsThe Editing area contains two transport buttons:Â Play: Starts or stops playback of the selected audio track. You can also use the

19Auditioning Your Impulse ResponseTo really know how your impulse response will sound when used in Space Designer, you need to be able to listen to i

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20 Monitor Level field: Sets the overall auditioning volume. Test Audio File buttons: Plays one of the four built-in test source audio files. Ope

21Creating a Space Designer SettingOnce you are satisfied with your impulse response, the final step is to generate a .sdir file, and a plug-in settin

22Saving and Opening ProjectsAs mentioned earlier, Impulse Response Utility automatically saves your project as soon as you record audio. You can manu

23Microphone and Speaker SuggestionsThe impulse response of a space is never just the space’s impulse response. The recorded impulse response is alway

24Below are some specific approaches for you to experiment with when creating impulse responses. Remember, these are just suggestions. There are no ru

25The Auralization ApproachAnother common strategy for placing speakers and microphones in a space uses the auralization approach. This technique atte

26The Virtual Echo Chamber ApproachA good alternative to the auralization approach is placement of your speakers and microphones in a way that creates

27Recording Impulse Responses From Guitar Speakers and Hardware DevicesYou aren’t limited to creating impulse responses from rooms and spaces. You can

28This scenario requires neither speakers or microphones. You can simply connect the output from your audio interface to the input of your hardware de

29Space Designer can decode and convolve these four streams into reverbs, in all supported surround formats. Space Designer offers a comprehensive lib

3 Using Impulse Response Utility Impulse Response Utility is a multi-track audio recording and deconvolution application. It allows you to cre

30Microphone Suggestions for B-Format RecordingPerhaps the ultimate B-Format recording microphones are the SoundField single point source microphone s

31TutorialThis section will walk you through the complete process of creating an impulse response, from project start through to final Space Designer

32Repeat this process twenty-three more times, until you have recorded all twenty-five audio tracks needed to capture all possible microphone and spea

4 Deconvolution is the process used to create impulse responses from (recorded) broadband audio sine sweeps. The following section covers deconvolut

5 The recorded sine sweep audio file cannot directly be used as an impulse response. The recorded file contains all the echoes and reflections—in oth

6 Note: You may also need additional microphone pre-amplifiers if you find that your microphones can’t capture a strong enough signal, or your audi

7 If your audio interface doesn’t have enough inputs and outputs—for the number of speakers and microphones you are using to create your impulse resp

8 Creating Your Project When you first open Impulse Response Utility, you will be presented with the New Impulse Response Project dialog window. This

9 Setting Impulse Response Utility Parameters Once you have created a new impulse response project, you will need to assign the audio input and outpu