Merge pull request #4 from enummusic/patch-1

comment on 266-4th-order-linkwitz-riley-filters.rst
bdejong · Jun 25, 2021 · a295ccd · a295ccd
2 parents d27b9e5 + 0d48d14
commit a295ccd
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diff --git a/source/Filters/266-4th-order-linkwitz-riley-filters.rst b/source/Filters/266-4th-order-linkwitz-riley-filters.rst
@@ -520,4 +520,14 @@ Comments
     Seems there is a fundamental problem with the HPF coefficients in this code :(
     The LF Noise for both LR2 and LR4 appears to be a modulating DC offset - maybe that can guide the Filter Gurus to identify and solve the problem.
     Cheers.....Chris    
+    
+- **Date**: 2020-05-25 01:45:00
+- **By**: enummusic
+
+.. code-block:: text 
+
+    In my experience, simply changing all the variables used in LRCrossoverFilter::setup() and processBlock() to doubles is sufficient to reduce/eliminate noise, thanks to an idea from here: https://www.musicdsp.org/en/latest/Filters/232-type-lpf-24db-oct.html
+    "It turns out, that the filter is only unstable if the coefficient/state precision isn't high enough. Using double instead of single precision already makes it a lot more stable."
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