diff --git a/inputsource.cpp b/inputsource.cpp
index 9b77c91..327ee23 100644
--- a/inputsource.cpp
+++ b/inputsource.cpp
@@ -37,9 +37,9 @@ void InputSource::cleanupFFTW() {
     if (m_fftw_out != nullptr) fftwf_free(m_fftw_out);
 }
 
-void InputSource::GetViewport(float *dest, int x, int y, int width, int height, int zoom) {
+void InputSource::getViewport(float *dest, int x, int y, int width, int height, int zoom) {
 
-    fftwf_complex *sample_ptr = &m_data[y * GetFFTStride()];
+    fftwf_complex *sample_ptr = &m_data[y * getFFTStride()];
 
     for (int i = 0; i < height; i++) {
         // Abort if sampling more data than is actually available
@@ -65,17 +65,17 @@ void InputSource::GetViewport(float *dest, int x, int y, int width, int height,
             *dest = magdb;
             dest++;
         }
-        sample_ptr += GetFFTStride();
+        sample_ptr += getFFTStride();
     }
 }
 
-int InputSource::GetHeight() {
-    int lines = m_file_size / sizeof(fftwf_complex) / GetFFTStride();
+int InputSource::getHeight() {
+    int lines = m_file_size / sizeof(fftwf_complex) / getFFTStride();
     // Force height to be a multiple of overlap size
-    return (lines / GetFFTStride()) * GetFFTStride();
+    return (lines / getFFTStride()) * getFFTStride();
 }
 
-int InputSource::GetWidth() {
+int InputSource::getWidth() {
     return m_fft_size;
 }
 
@@ -96,7 +96,7 @@ void InputSource::setFFTSize(int size) {
     m_max_zoom = floor(log2(m_fft_size));
 }
 
-bool InputSource::ZoomIn() {
+bool InputSource::zoomIn() {
     m_zoom++;
     if (m_zoom > m_max_zoom) {
         m_zoom = m_max_zoom;
@@ -105,7 +105,7 @@ bool InputSource::ZoomIn() {
     return true;
 }
 
-bool InputSource::ZoomOut() {
+bool InputSource::zoomOut() {
     m_zoom--;
     if (m_zoom < 0) {
         m_zoom = 0;
@@ -114,6 +114,6 @@ bool InputSource::ZoomOut() {
     return true;
 }
 
-int InputSource::GetFFTStride() {
+int InputSource::getFFTStride() {
     return m_fft_size / pow(2, m_zoom);
 }
diff --git a/inputsource.h b/inputsource.h
index c48eef4..4588fd1 100644
--- a/inputsource.h
+++ b/inputsource.h
@@ -19,7 +19,7 @@ private:
     int m_zoom;
     int m_max_zoom;
 
-    int GetFFTStride();
+    int getFFTStride();
     void cleanupFFTW();
     
 
@@ -27,11 +27,11 @@ public:
     InputSource(const char *filename, int fft_size);
     ~InputSource();
 
-    void GetViewport(float *dest, int x, int y, int width, int height, int zoom);
-    int GetHeight();
-    int GetWidth();
+    void getViewport(float *dest, int x, int y, int width, int height, int zoom);
+    int getHeight();
+    int getWidth();
     void setFFTSize(int size);
 
-    bool ZoomIn();
-    bool ZoomOut();
+    bool zoomIn();
+    bool zoomOut();
 };
diff --git a/spectrogram.cpp b/spectrogram.cpp
index 2c4ec20..f9d524e 100644
--- a/spectrogram.cpp
+++ b/spectrogram.cpp
@@ -30,7 +30,7 @@ void Spectrogram::pickFile()
 			InputSource *newFile = new InputSource(fileName.toUtf8().constData(), fftSize);
 			delete inputSource;
 			inputSource = newFile;
-			resize(inputSource->GetWidth(), inputSource->GetHeight());
+			resize(inputSource->getWidth(), inputSource->getHeight());
 		} catch (std::runtime_error e) {
 			// TODO: display error
 			return;
@@ -104,12 +104,12 @@ void Spectrogram::paintEvent(QPaintEvent *event)
 	painter.fillRect(rect, Qt::black);
 
 	if (inputSource != nullptr) {
-		int width = inputSource->GetWidth();
+		int width = inputSource->getWidth();
 		int height = rect.height();
 
 		float *data = (float*)malloc(width * height * sizeof(float));
 
-		inputSource->GetViewport(data, 0, rect.y(), width, height, 0);
+		inputSource->getViewport(data, 0, rect.y(), width, height, 0);
 
 		QImage image(width, height, QImage::Format_RGB32);
 		for (int y = 0; y < height; y++) {
@@ -140,7 +140,7 @@ void Spectrogram::setFFTSize(int size)
 	if (inputSource != nullptr) {
 		inputSource->setFFTSize(size);
 		update();
-		resize(inputSource->GetWidth(), inputSource->GetHeight());
+		resize(inputSource->getWidth(), inputSource->getHeight());
 	}
 }