mi niDSP Ltd, Hong Kong /
/ Features and speci fi cations subject to change wi thout pri or noti ce
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5.3.3
Filter file format
The filter coefficient file loaded in File Mode uses
IEEE 754 single-precision binary floating-point format
. The
number of entries in the file must not exceed the allocated number of taps.
In Manual Mode, the coefficients must be plain text in this format:
b0 = 1,
b1 = -1,
b2 = 0.5,
b3 = -0.5,
b4 = 0.2,
b5 = 1,
5.3.4
Loading filter coefficients
In File Mode:
a.
Click Browse, navigate to the file containing the filter coefficients, and open it. A dialog will appear
confirming the number of coefficients loaded.
b.
Confirm that the response curve is as you expect.
c.
Press Send to DSP. This will write the coefficients into the DSP's memory.
d.
To clear the filter coefficients, click Unload FIR and then Send to DSP.
In Manual Mode:
a.
Cut and paste the coefficients from the text output of the design program.
b.
Press the Process button.
c.
Confirm that the frequency response graph is as you expect.
d.
Press Send to DSP. This will write the coefficients into the DSP's memory.
e.
To clear the filter coefficients, click Clear Taps and then Send to DSP.
If, after selecting a filter file or setting coefficients, the frequency
response graph does not change as expected, make sure that the
filter is not bypassed.
If you clear the filter taps, make sure that you also bypass the
filter, otherwise there will be no audio through that channel.
