diff --git a/src/waveform.rs b/src/waveform.rs
index eca9b94..3a078c7 100644
--- a/src/waveform.rs
+++ b/src/waveform.rs
@@ -68,10 +68,10 @@ impl Waveform {
             }
             // Set function scoped last rows
             if previous_left_row.0 != self.rgba.height as usize && previous_left_row.1 != 0 {
-                last_rows.0 = if (previous_left_row.0 as f32 - 128f32).abs() < (previous_left_row.1 as f32 - 128f32).abs() {previous_left_row.0} else {previous_left_row.1};
+                last_rows.0 = if (previous_left_row.0 as f32 - (self.rgba.height/2) as f32).abs() < (previous_left_row.1 as f32 - (self.rgba.height/2) as f32).abs() {previous_left_row.0} else {previous_left_row.1};
             }
             if previous_right_row.0 != self.rgba.height as usize && previous_right_row.1 != 0 {
-                last_rows.1 = if (previous_right_row.0 as f32 - 128f32).abs() < (previous_right_row.1 as f32 - 128f32).abs() {previous_right_row.0} else {previous_right_row.1};
+                last_rows.1 = if (previous_right_row.0 as f32 - (self.rgba.height/2) as f32).abs() < (previous_right_row.1 as f32 - (self.rgba.height/2) as f32).abs() {previous_right_row.0} else {previous_right_row.1};
             }
         }
         else {
@@ -84,7 +84,7 @@ impl Waveform {
             // LEFT CHANNEL
             let column_values : &[f32] = &left_samples[x*left_column_width..(x+1)*left_column_width];
             let column_average : f32 = (column_values.iter().cloned().reduce(|acc, v| acc+v).unwrap_or(0f32) / column_values.len() as f32).clamp(-0.99, 0.99);
-            let row = (128f32 - (column_average * 128f32)).round() as usize;
+            let row = ((self.rgba.height/2) as f32 - (column_average * (self.rgba.height/2) as f32)).round() as usize;
             
             // Draw vertical lines from last row
             let range : Vec<usize> = if row <= last_rows.0 {(row..=last_rows.0).collect()} else {(last_rows.0..=row).rev().collect()};
@@ -98,7 +98,7 @@ impl Waveform {
             // RIGHT CHANNEL
             let column_values : &[f32] = &right_samples[x*right_column_width..(x+1)*right_column_width];
             let column_average : f32 = (column_values.iter().cloned().reduce(|acc, v| acc+v).unwrap_or(0f32) / column_values.len() as f32).clamp(-0.99, 0.99);
-            let row = (128f32 - (column_average * 128f32)).round() as usize;
+            let row = ((self.rgba.height/2) as f32 - (column_average * (self.rgba.height/2) as f32)).round() as usize;
             
             // Draw vertical lines from last row
             let range : Vec<usize> = if row <= last_rows.1 {(row..=last_rows.1).collect()} else {(last_rows.1..=row).rev().collect()};