CLIOwin 7 PCI User's Manual - Audiomatica

10.6 PROCESSING TOOLS BY EXAMPLE
CLIO has powerful processing tools that can be helpful in several circumstances. We saw
the basics at the beginning of this chapter. It was just a brief description of the kind "press
this to do that". Here we are going to use some of them in practice. Some general rules
apply to a group of them for four basic operations. You can add, subtract, multiply and
divide the data in memory either with a single complex value or with a compatible file.
Compatible means that it must be a file with the same basic settings as the one in
memory. Y-scale must also be the same that is you cannot add dBV with Ohm. The use
of Load Process and Save Process, will become clearer as we review the examples. The
Add and Sub functions are used mostly among files. We will use them to obtain the sum
and difference of the woofer and tweeter of Fig.10.20. Results are in Fig.10.30 where
the sum is in red and the difference in blue. These are useful plots to start with during
a cross-over design. For example it is interesting to consider the big notch in the sum
curve, something not easy to imagine from the magnitude response.
110.0
CLIO
180.0
dBSPL
Deg
100.0 108.0
90.0 36.0
80.0 -36.0
70.0 -108.0
60.0 -180.0
20 100 1k Hz
10k 20k
Figure 10.30
The divide function, in its most classical use, allows the user to show a magnitude
response as a transfer function with another measurement. Suppose you want to
evaluate how the grid affects the frequency response. We will use the response of
Fig.10.17 as a reference, which has been taken with the grid in place. We remove it,
take another measurement, and perform a division by file with the grid in place. We
remove it, take another measurement, and perform a division by file with the data of
the reference. Result is in Fig.10.31.
20.0
CLIO
180.0
dBRel
Deg
10.0 108.0
0.0 36.0
-10.0 -36.0
-20.0 -108.0
-30.0 -180.0
20 Hz
100 1k 10k 20k
Figure 10.31
Note that the y-scale has been automatically changed to dBRel. This is a good point to
introduce the use of Load and Save process together with the Automatic Processing
Chapter 10 - MLS 125