Recording – Apple Impulse Response Utility User Manual
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VU Meter
Impulse Response Utility offers a VU meter that measures either; the signal level
present at the (soloed) track input, or the sweep generator output. During playback of
recorded audio, the VU Meter displays the level of the selected track. A status message
below the VU Meter shows its current operating mode. The VU Meter scale ranges from
0% to 100%, with 100% equalling 0 dB.
Recording
Once you have configured and record-enabled the desired tracks, click the Sweep/
Record button. If you are using the sweep generator, the button shows “Sweep”. If you
are not using the sweep generator (Sweep Length parameter is set to Off ) the button
shows “Record”.
 Clicking Sweep automatically starts the recording process and generates the sine
sweep (using the sweep generator parameters you chose). The VU Meter is
automatically switched to display the sweep generator output.
 Clicking Record automatically begins the recording process. Shoot your starter pistol
and Impulse Response Utility will record the impulse response.
Recording will continue until the entire sine sweep (if the sweep generator is being
used) and Reverb Length time has elapsed. The recording automatically ends. You can
manually end the recording process by clicking the Sweep/Record button.
Note: The Sweep/Record button is disabled if no track is record-enabled.
Automatic Saving of Projects
Impulse Response Utility records into your computer RAM, not to hard disk. This means
that nothing you have recorded is saved, until you save your project!
For your convenience, Impulse Response Utility automatically saves your project to disk
after every recording.
If you haven’t saved your project, the Save dialog is launched, allowing you to name
your project, and choose a hard disk location. If you have already saved your project,
the save process happens automatically. See “
for more information.