From 72fd4a1e3d6118f52be7f609708209535e8a9e24 Mon Sep 17 00:00:00 2001
From: Mike Oliphant <oliphant@nostatic.org>
Date: Tue, 9 Apr 2024 08:00:35 -0700
Subject: [PATCH] Make DC blocker coefficient depend on sample rate

---
 src/nam_plugin.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/nam_plugin.cpp b/src/nam_plugin.cpp
index 5f524f7..88d6d83 100644
--- a/src/nam_plugin.cpp
+++ b/src/nam_plugin.cpp
@@ -288,12 +288,14 @@ namespace NAM {
 			}
 		}
 
+		float dcBlockCoefficient = 1 - (220.0 / sampleRate);
+
 		for (unsigned int i = 0; i < n_samples; i++)
 		{
 			float dcInput = ports.audio_out[i];
 
 			// dc blocker
-			ports.audio_out[i] = ports.audio_out[i] - prevDCInput + 0.995 * prevDCOutput;
+			ports.audio_out[i] = ports.audio_out[i] - prevDCInput + dcBlockCoefficient * prevDCOutput;
 
 			prevDCInput = dcInput;
 			prevDCOutput = ports.audio_out[i];