diff --git a/tracker/detector.go b/tracker/detector.go
index e8cb925..4e1c556 100644
--- a/tracker/detector.go
+++ b/tracker/detector.go
@@ -375,7 +375,7 @@ func (d *peakDetector) update(buf sointu.AudioBuffer) (ret PeakResult) {
 		for i := range d.windows {
 			d.windows[i][chn].WriteWrapSingle(p)
 			windowPeak := vek32.Max(d.windows[i][chn].Buffer)
-			ret[chn][i+int(PeakMomentary)] = Decibel(10 * math.Log10(float64(windowPeak)))
+			ret[i+int(PeakMomentary)][chn] = Decibel(10 * math.Log10(float64(windowPeak)))
 		}
 		if d.maxPower[chn] < p {
 			d.maxPower[chn] = p