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C H A P T E R
5 :
W I D E
B A N D
A U D I O
Q U A L I T Y
T E S T I N G
The Snap Again toolbar button to the right of the Freeze Delay button is
disabled at the moment since our measurement is running in the Normal mode
of the Automatic Delay Compensation. At any time the running measurement
can be discontinued and a different measurement settings like the Snap mode
can be selected, for example, before starting a new measurement.
5.6.2 Example 2: Stand Alone Testing
In this example an analysis will be performed of a .wav file, which could be a
decoded mp3 signal, for instance.
First of all, enter a name for our measurement. Select from Measurement|Name
Measurement... and enter the name "Example 2". Now select from the menu
option Measurement|Algorithm Parameters... the algorithm PEAQ. Take
notice of the following warning message and click on the Continue button.
Now commence the measurement. Press the Start toolbar button shown in
Figure 5.38.
Figure 5.38: Toolbar button for starting the measurement
Now the Measurement Setup Wizard starts and the window to select the first
input signal is displayed (see Figure 5.39). Select the radio button File and
choose "AudioRef.wav" as your first signal. Underneath the text edit box
information about the signal is displayed: The sampling rate, the bit resolution,
the number of channels and the total time length.
Figure 5.39: Input 1 window of the Measurement Setup Wizard
In the next window of the wizard chose the file for the second input,
"AudioTest.wav". After this determine that Input 1 shall be used as the reference
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