diff --git a/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/platform/test/HeadlessPlatform.kt b/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/platform/test/HeadlessPlatform.kt
index 65a368a7..a9fa333e 100644
--- a/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/platform/test/HeadlessPlatform.kt
+++ b/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/platform/test/HeadlessPlatform.kt
@@ -96,7 +96,7 @@ class HeadlessPlatform(override val gameOptions: GameOptions, val resources: Map
                 }
             }
 
-            override fun playBuffer(buffer: FloatArray) = Unit
+            override fun playBuffer(buffer: FloatArray, numberOfSamples: Int) = Unit
         }
     }
 
diff --git a/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/sound/SoundConverterTest.kt b/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/sound/SoundConverterTest.kt
index 0977bb27..6859dbc4 100644
--- a/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/sound/SoundConverterTest.kt
+++ b/tiny-engine/src/commonTest/kotlin/com/github/minigdx/tiny/sound/SoundConverterTest.kt
@@ -29,7 +29,7 @@ class SoundConverterTest {
 
         val (lastBeat, result) = SoundConverter().prepareStrip(song)
 
-        assertEquals(1, lastBeat)
+        assertEquals(2, lastBeat)
         assertEquals(2, result.size)
         assertEquals(65, result[sine.name]!!.size)
         assertEquals(65, result[pulse.name]!!.size)