diff --git a/gumble/opus/opus.go b/gumble/opus/opus.go
index 39eb8c4..a183e35 100644
--- a/gumble/opus/opus.go
+++ b/gumble/opus/opus.go
@@ -97,17 +97,21 @@ func (*Decoder) ID() int {
 }
 
 func (d *Decoder) Decode(data []byte, frameSize int) ([]int16, error) {
-	// Allocate buffer for stereo - frameSize is per channel
-	pcm := make([]int16, frameSize*gumble.AudioChannels)
+	// frameSize is the maximum number of PCM samples (all channels
+	// combined). The underlying Opus decoder output is interleaved
+	// stereo, so the buffer holds left+right pairs.
+	pcm := make([]int16, frameSize)
 
-	// Decode the data
+	// Decode the data. If data is nil/empty, the decoder performs
+	// Packet Loss Concealment and produces a concealed frame.
 	n, err := d.Decoder.Decode(data, pcm)
 	if err != nil {
 		return []int16{}, err
 	}
 
-	// Return the exact number of samples decoded
-	return pcm[:n*gumble.AudioChannels], nil
+	// n is the number of samples per channel; stereo interleaved
+	// output means total samples = n * channels.
+	return pcm[:n*d.channels], nil
 }
 
 func (d *Decoder) Reset() {