diff --git a/lib/filters.c b/lib/filters.c
index 9d40585..5325952 100644
--- a/lib/filters.c
+++ b/lib/filters.c
@@ -41,7 +41,7 @@ float upsample(Upsampler* up, float sample) {
     float output = 0.0f;
 
     if (up->i == 0) {
-        output = sample * up->ratio;
+        output = sample;
     } else {
         output = 0.0f;
     }