diff --git a/src/main.rs b/src/main.rs
index 4c945e5..6a72552 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -779,7 +779,11 @@ const APP: () = {
             let x0 = f32::from(a as i16);
             let y0 =
                 c.resources.iir_ch[1].update(&mut c.resources.iir_state[1], x0);
-            y0 as i16 as u16 ^ 0x8000
+            // note(unsafe): The filter limits ensure that the value is in range.
+            // The truncation introduces 1/2 LSB distortion.
+            let y0 = unsafe { y0.to_int_unchecked::<i16>() };
+            // convert to DAC code
+            y0 as u16 ^ 0x8000
         };
 
         c.resources.dac1.send(output).unwrap();
@@ -792,7 +796,11 @@ const APP: () = {
             let x0 = f32::from(a as i16);
             let y0 =
                 c.resources.iir_ch[0].update(&mut c.resources.iir_state[0], x0);
-            y0 as i16 as u16 ^ 0x8000
+            // note(unsafe): The filter limits ensure that the value is in range.
+            // The truncation introduces 1/2 LSB distortion.
+            let y0 = unsafe { y0.to_int_unchecked::<i16>() };
+            // convert to DAC code
+            y0 as u16 ^ 0x8000
         };
 
         c.resources.dac0.send(output).unwrap();