Use approximated pole instead of exact

ndonald2 · ndonald2 · commit 189076f7a93e · 2025-03-25T11:18:24.000-06:00
diff --git a/Source/Utility/dcblock.cpp b/Source/Utility/dcblock.cpp
@@ -7,7 +7,7 @@ void DcBlock::Init(float sample_rate)
 {
     output_ = 0.0;
     input_  = 0.0;
-    gain_   = expf(-2.0f * M_PI * 10.f / sample_rate);
+    gain_   = 1.0 - 10.f / sample_rate;
 }
 
 float DcBlock::Process(float in)

Original file line number	Diff line number	Diff line change
`@@ -7,7 +7,7 @@ void DcBlock::Init(float sample_rate)`
`7`	`7`	`{`
`8`	`8`	`output_ = 0.0;`
`9`	`9`	`input_ = 0.0;`
`10`		`- gain_ = expf(-2.0f * M_PI * 10.f / sample_rate);`
	`10`	`+ gain_ = 1.0 - 10.f / sample_rate;`
`11`	`11`	`}`
`12`	`12`
`13`	`13`	`float DcBlock::Process(float in)`