From 7288da797ca8751df64d8dca7778c66078f40f0b Mon Sep 17 00:00:00 2001
From: Damien Zammit <damien@zamaudio.com>
Date: Sun, 27 Jan 2019 19:45:32 +1100
Subject: Adjust gain so switching tonestack models balance out at 1kHz

---
 plugins/ZamTube/ZamTubePlugin.cpp |  5 +++--
 plugins/ZamTube/tonestacks.cpp    | 29 +++++++++++++++++++++++++++++
 plugins/ZamTube/tonestacks.hpp    |  2 ++
 3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/plugins/ZamTube/ZamTubePlugin.cpp b/plugins/ZamTube/ZamTubePlugin.cpp
index 408c51b..03b6f80 100644
--- a/plugins/ZamTube/ZamTubePlugin.cpp
+++ b/plugins/ZamTube/ZamTubePlugin.cpp
@@ -301,7 +301,8 @@ void ZamTubePlugin::deactivate()
 		
 void ZamTubePlugin::run(const float** inputs, float** outputs, uint32_t frames)
 {
-	uint8_t stack = (uint8_t)tonestack > 24 ? 24 : (uint8_t)tonestack;
+	const uint8_t stack = (uint8_t)tonestack > 24 ? 24 : (uint8_t)tonestack;
+	const float adjustdb = Tonestacks::adjustdb[stack];
 
 	float 	fSlow0 = float(ts[stack][R4]);
 	float 	fSlow1 = float(ts[stack][R3]);
@@ -355,7 +356,7 @@ void ZamTubePlugin::run(const float** inputs, float** outputs, uint32_t frames)
 	
 	float cut = insane ? 0. : 15.;
 	float pregain = from_dB(tubedrive*3.6364 - cut);
-	float postgain = from_dB(mastergain + cut + 5. + 42. * (1. - log1p(tubedrive/11.)));
+	float postgain = from_dB(mastergain + cut + adjustdb + 5. + 42. * (1. - log1p(tubedrive/11.)));
 
 	for (uint32_t i = 0; i < frames; ++i) {
 
diff --git a/plugins/ZamTube/tonestacks.cpp b/plugins/ZamTube/tonestacks.cpp
index 59e80d3..10ec601 100644
--- a/plugins/ZamTube/tonestacks.cpp
+++ b/plugins/ZamTube/tonestacks.cpp
@@ -29,6 +29,34 @@ static const float tones[] = {
 	1e+6,	1e+6,	94e+3,	270e+3,	25e-12,	60e-9,	20e-9
 };
 
+static const float levels[] =  {
+	 8.,
+	10.,
+	17.,
+	13.,
+	 5.,
+	 5.,
+	 6.,
+	 4.,
+	 8.,
+	15.,
+	 1.,
+	 5.,
+	 4.,
+	 9.,
+	11.,
+	10.,
+	 4.,
+	19.,
+	 7.,
+	 7.,
+	14.,
+	10.,
+	12.,
+	10.,
+	12.
+};
+
 const float* Tonestacks::bassman = (const float*)&tones[0];
 const float* Tonestacks::mesa = (const float*)&tones[1*7];
 const float* Tonestacks::twin = (const float*)&tones[2*7];
@@ -55,3 +83,4 @@ const float* Tonestacks::fender = (const float*)&tones[22*7];
 const float* Tonestacks::fenderdeville = (const float*)&tones[23*7];
 const float* Tonestacks::gibson = (const float*)&tones[24*7];
 
+const float* Tonestacks::adjustdb = (const float*)&levels[0];
diff --git a/plugins/ZamTube/tonestacks.hpp b/plugins/ZamTube/tonestacks.hpp
index 67ce826..13eb1d4 100644
--- a/plugins/ZamTube/tonestacks.hpp
+++ b/plugins/ZamTube/tonestacks.hpp
@@ -28,6 +28,8 @@ namespace Tonestacks
 	extern const float* fender;
 	extern const float* fenderdeville;
 	extern const float* gibson;
+
+	extern const float* adjustdb;
 }
 
 #endif
-- 
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