Checking the Generator Output
9
SREV1 Sampling Guide
Checking the Generator Output
We’re now ready to check the generator output. Click the Start Generator button on the
Sampling Control toolbar and verify that the test signal is being output properly from
the speaker system. If it’s not, check the connections and generator output assignment.
Starting with the level set low, gradually increase the power amp’s input attenuators so
that the pulses can be clearly heard. (Setting the Generator mode to loop is convenient
for outputting pulses continuously while making this adjustment.) The pulse signal
should be loud enough to fully energize the reverberant characteristics of the environ-
ment you are sampling, but without distortion.
Setting Input Levels Automatically
The Level Adjust function offers a convenient way to set input levels automatically.
Click the Adjust button on the main window, and when the Level Adjust window
appears, click the Start button. The SREV1 outputs several pulses and IRSampler cal-
culates the optimum input levels. A progress report appears in the Status box.
In addition to setting the input level faders, the Level Adjust function automatically cal-
culates and sets the CNV (Convolution) Bit Shift parameter, which is used to normalize
the acquired data to an optimum level for use with the SREV1.
Actual Sampling
Sampling
To begin sampling, click the Start Sampling button on the Sampling Control toolbar.
Sampling is performed in accordance with the parameter settings made earlier. When
sampling is complete, the Waveform window appears automatically, displaying wave-
forms of the acquired data.
Saving the Acquired Data
If you are happy with the acquired data, enter titles, and click the Save As button for
each waveform. (The title is saved in the file header.) Enter a filename in the Save As dia-
log box and click Save. By default, data is saved in the “irdata” (c:/yamaha/irmec/irdata)
folder on the PC Card in TM4 format. (A “.tm4” file extension is added automatically.)
Taking Several Samples
While your sampling system is setup, it’s a good idea to take several samples at various
microphone and speaker placements or with different IRSampler settings. Once back
in the studio you can easily delete the unwanted data. Going back to a location and set-
ting up all your gear again, however, may not be so easy.
