diff --git a/app/src/main/java/at/lockstep/player/util/RunAccelSample.kt b/app/src/main/java/at/lockstep/player/util/RunAccelSample.kt
new file mode 100644
index 0000000..d3cb502
--- /dev/null
+++ b/app/src/main/java/at/lockstep/player/util/RunAccelSample.kt
@@ -0,0 +1,24 @@
+package at.lockstep.player.util
+
+data class RunAccelSample(
+    /** Nanoseconds since the current song started ([android.hardware.SensorEvent.timestamp] base). */
+    val timestampNanos: Long,
+    /** ExoPlayer position in ms when this sample was taken — frozen while paused. */
+    val positionMs: Long,
+    val values: FloatArray,
+) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other !is RunAccelSample) return false
+        return timestampNanos == other.timestampNanos &&
+            positionMs == other.positionMs &&
+            values.contentEquals(other.values)
+    }
+
+    override fun hashCode(): Int {
+        var result = timestampNanos.hashCode()
+        result = 31 * result + positionMs.hashCode()
+        result = 31 * result + values.contentHashCode()
+        return result
+    }
+}