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authorjacqueline <me@jacqueline.id.au>2023-08-04 20:07:44 +1000
committerjacqueline <me@jacqueline.id.au>2023-08-04 20:07:44 +1000
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downloadtangara-fw-60f767713227b5405b855e6e6e2a0475ecd96bcc.tar.gz
Do our own resampling
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-# Generating Filter Coefficients
-
-The scripts below are used in [GNU Octave][GNU Octave] which should be available
-on most platforms including Linux, Mac and Windows.
-
-On Debian and other Debian derived Linux distributions, Octave can be installed
-using: `sudo apt install octave octave-signal`.
-
-Filter coefficients can be generated as follows by running the `octave` command
-in the same directory as the scripts and this Readme file:
-
-```
-octave:1> pkg load signal
-octave:2> f = make_filter (8, 128, 100.3) ;
-# f = make_fip_filter (8, 128, 100.3) ;
-# Coeff. count : 4922
-# Fudge factor : 1.2018769
-# Pass band width : 0.0039062499 (should be 0.0039062500)
-# Stop band atten. : 100.71 dB
-# -3dB band Width : 0.490
-# half length : 2464
-# increment : 128
-```
-
-The parameters above generate the coefficient set used in `src/fastest_coeffs.h`.
-
-[GNU Octave]: https://www.gnu.org/software/octave/