@@ -, +, @@ 
---
 libavcodec/dtsdec.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
--- a/libavcodec/dtsdec.c	
+++ a/libavcodec/dtsdec.c	
@@ -216,7 +216,15 @@ dts_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
     level = CONVERT_LEVEL;
     bias = CONVERT_BIAS;
 
-    flags = s->flags | DTS_ADJUST_LEVEL;
+    if(avctx->channels == 1) {
+        flags = DTS_MONO;
+    } else if(avctx->channels == 2) {
+        flags = DTS_STEREO;
+    } else {
+        flags = s->flags;
+    }
+
+    flags |= DTS_ADJUST_LEVEL;
     if(dts_frame(s->state, s->buf, &flags, &level, bias)) {
         av_log(avctx, AV_LOG_ERROR, "dts_frame() failed\n");
         goto end;
--