diff --git a/Outputs/CRT/CRT.cpp b/Outputs/CRT/CRT.cpp
index 5b4cf0cdc..c5ba7ee68 100644
--- a/Outputs/CRT/CRT.cpp
+++ b/Outputs/CRT/CRT.cpp
@@ -113,7 +113,7 @@ Flywheel::SyncEvent CRT::get_next_horizontal_sync_event(bool hsync_is_requested,
 #define source_output_position_y()	(*(uint16_t *)&next_run[SourceVertexOffsetOfOutputStart + 2])
 #define source_output_position_x2()	(*(uint16_t *)&next_run[SourceVertexOffsetOfEnds + 2])
 #define source_phase()				next_run[SourceVertexOffsetOfPhaseTimeAndAmplitude + 0]
-#define source_amplitude()			next_run[SourceVertexOffsetOfPhaseTimeAndAmplitude + 2]
+#define source_amplitude()			next_run[SourceVertexOffsetOfPhaseTimeAndAmplitude + 1]
 
 void CRT::advance_cycles(unsigned int number_of_cycles, bool hsync_requested, bool vsync_requested, const Scan::Type type) {
 	std::unique_lock<std::mutex> output_lock = openGL_output_builder_.get_output_lock();
diff --git a/Outputs/CRT/Internals/Shaders/IntermediateShader.cpp b/Outputs/CRT/Internals/Shaders/IntermediateShader.cpp
index 72e1fc6dc..239e948ff 100644
--- a/Outputs/CRT/Internals/Shaders/IntermediateShader.cpp
+++ b/Outputs/CRT/Internals/Shaders/IntermediateShader.cpp
@@ -97,7 +97,7 @@ std::unique_ptr<IntermediateShader> IntermediateShader::make_shader(const std::s
 			// setup phaseAndAmplitudeVarying.y as colour burst amplitude;
 			// setup phaseAndAmplitudeVarying.z as 1 / (colour burst amplitude), or 0.0 if amplitude is 0.0;
 			"phaseAndAmplitudeVarying.x = (extendedOutputPosition.x + (phaseTimeAndAmplitude.x / 64.0)) * 0.5 * 3.141592654;"
-			"phaseAndAmplitudeVarying.y = 0.33;" // TODO: reinstate connection with phaseTimeAndAmplitude.y / 255.0;"
+			"phaseAndAmplitudeVarying.y = phaseTimeAndAmplitude.y / 255.0;"
 			"phaseAndAmplitudeVarying.z = (phaseAndAmplitudeVarying.y > 0.0) ? 1.0 / phaseAndAmplitudeVarying.y : 0.0;"
 
 			// determine output position by scaling the output position according to the texture size