diff --git a/audio/wav/decode.go b/audio/wav/decode.go
index dfbd0f4..eb0502d 100644
--- a/audio/wav/decode.go
+++ b/audio/wav/decode.go
@@ -123,18 +123,18 @@ func (s *decoder) Stream(samples [][2]float64) (n int, ok bool) {
 	}
 	switch {
 	case s.h.BitsPerSample == 8 && s.h.NumChans == 1:
-		for i, j := 0, 0; i < n-bytesPerFrame; i, j = i+bytesPerFrame, j+1 {
+		for i, j := 0, 0; i <= n-bytesPerFrame; i, j = i+bytesPerFrame, j+1 {
 			val := float64(p[i])/(1<<8-1)*2 - 1
 			samples[j][0] = val
 			samples[j][1] = val
 		}
 	case s.h.BitsPerSample == 8 && s.h.NumChans >= 2:
-		for i, j := 0, 0; i < n-bytesPerFrame; i, j = i+bytesPerFrame, j+1 {
+		for i, j := 0, 0; i <= n-bytesPerFrame; i, j = i+bytesPerFrame, j+1 {
 			samples[j][0] = float64(p[i+0])/(1<<8-1)*2 - 1
 			samples[j][1] = float64(p[i+1])/(1<<8-1)*2 - 1
 		}
 	case s.h.BitsPerSample == 16 && s.h.NumChans == 1:
-		for i, j := 0, 0; i < n-bytesPerFrame; i, j = i+bytesPerFrame, j+1 {
+		for i, j := 0, 0; i <= n-bytesPerFrame; i, j = i+bytesPerFrame, j+1 {
 			val := float64(int16(p[i+0])+int16(p[i+1])*(1<<8)) / (1<<15 - 1)
 			samples[j][0] = val
 			samples[j][1] = val