diff --git a/pkg/core/codec.go b/pkg/core/codec.go
index f3de809f..61ea74da 100644
--- a/pkg/core/codec.go
+++ b/pkg/core/codec.go
@@ -106,7 +106,6 @@ func UnmarshalCodec(md *sdp.MediaDescription, payloadType string) *Codec {
 		case "11":
 			c.Name = CodecPCM
 			c.ClockRate = 44100
-			c.Channels = 1
 		case "14":
 			c.Name = CodecMP3
 			c.ClockRate = 44100
diff --git a/pkg/pcm/flac.go b/pkg/pcm/flac.go
index cd72016d..054746d1 100644
--- a/pkg/pcm/flac.go
+++ b/pkg/pcm/flac.go
@@ -58,10 +58,18 @@ func FLACEncoder(codec *core.Codec, handler core.HandlerFunc) core.HandlerFunc {
 		sr = 0b0100
 	case 16000:
 		sr = 0b0101
+	case 22050:
+		sr = 0b0110
 	case 24000:
 		sr = 0b0111
+	case 32000:
+		sr = 0b1000
+	case 44100:
+		sr = 0b1001
 	case 48000:
 		sr = 0b1010
+	case 96000:
+		sr = 0b1011
 	default:
 		return nil
 	}