diff --git a/src/libprojectM/MilkdropPreset/Waveform.cpp b/src/libprojectM/MilkdropPreset/Waveform.cpp
index 701ed24dc..0277d10c4 100644
--- a/src/libprojectM/MilkdropPreset/Waveform.cpp
+++ b/src/libprojectM/MilkdropPreset/Waveform.cpp
@@ -41,7 +41,7 @@ void Waveform::Draw(const PerFrameContext& presetPerFrameContext)
 
     auto shader = m_presetState.untexturedShader.lock();
     shader->Bind();
-    shader->SetUniformMat4x4("vertex_transformation", PresetState::orthogonalProjection);
+    shader->SetUniformMat4x4("vertex_transformation", PresetState::orthogonalProjectionFlipped);
     shader->SetUniformFloat("vertex_point_size", 1.0f);
 
     // Additive wave drawing (vice overwrite)
diff --git a/src/libprojectM/MilkdropPreset/Waveforms/Line.cpp b/src/libprojectM/MilkdropPreset/Waveforms/Line.cpp
index 01271180a..a180baaeb 100644
--- a/src/libprojectM/MilkdropPreset/Waveforms/Line.cpp
+++ b/src/libprojectM/MilkdropPreset/Waveforms/Line.cpp
@@ -17,7 +17,7 @@ void Line::GenerateVertices(const PresetState& presetState, const PerFrameContex
 
     m_wave1Vertices.resize(m_samples);
 
-    ClipWaveformEdges(1.57f + m_mysteryWaveParam);
+    ClipWaveformEdges(1.57f * m_mysteryWaveParam);
 
     for (int i = 0; i < m_samples; i++)
     {
diff --git a/src/libprojectM/MilkdropPreset/Waveforms/WaveformMath.cpp b/src/libprojectM/MilkdropPreset/Waveforms/WaveformMath.cpp
index f33e3d1ea..f3e50f211 100644
--- a/src/libprojectM/MilkdropPreset/Waveforms/WaveformMath.cpp
+++ b/src/libprojectM/MilkdropPreset/Waveforms/WaveformMath.cpp
@@ -71,7 +71,7 @@ auto WaveformMath::GetVertices(const PresetState& presetState,
 
     m_mysteryWaveParam = static_cast<float>(*presetPerFrameContext.wave_mystery);
 
-    if (UsesNormalizedMysteryParam() && (m_mysteryWaveParam < 1.0f || m_mysteryWaveParam > 1.0f))
+    if (UsesNormalizedMysteryParam() && (m_mysteryWaveParam < -1.0f || m_mysteryWaveParam > 1.0f))
     {
         m_mysteryWaveParam = m_mysteryWaveParam * 0.5f + 0.5f;
         m_mysteryWaveParam -= std::floor(m_mysteryWaveParam);