diff --git a/lib/src/processor/memory/mmio/apu.rs b/lib/src/processor/memory/mmio/apu.rs
index 08ebbfc..93e1394 100644
--- a/lib/src/processor/memory/mmio/apu.rs
+++ b/lib/src/processor/memory/mmio/apu.rs
@@ -87,10 +87,10 @@ impl Apu {
     pub fn tick(&mut self, steps: usize, output: bool) {
         if output {
             for s in izip!(
-                self.channels.one.tick(steps).into_iter(),
-                self.channels.two.tick(steps).into_iter(),
-                self.channels.three.tick(steps).into_iter(),
-                self.channels.four.tick(steps).into_iter()
+                self.channels.one.tick(steps),
+                self.channels.two.tick(steps),
+                self.channels.three.tick(steps),
+                self.channels.four.tick(steps)
             )
             .map(|(one, two, three, four)| DacSample {
                 one,