diff --git a/src/dsp/mod.rs b/src/dsp/mod.rs
index 11407c6..6147c3b 100644
--- a/src/dsp/mod.rs
+++ b/src/dsp/mod.rs
@@ -284,7 +284,7 @@ macro_rules! f_freq { ($formatter: expr, $v: expr, $denorm_v: expr) => {
 macro_rules! f_det { ($formatter: expr, $v: expr, $denorm_v: expr) => {
     {
         let sign      = if $denorm_v < 0.0 { -1.0 } else { 1.0 };
-        let semitones = $denorm_v.floor().abs();
+        let semitones = $denorm_v.trunc().abs();
         let cents     = ($denorm_v.fract() * 100.0).round().abs();
 
         if (cents > 1.0) {