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@@ -194,10 +76,11 @@
 typedef struct ao_device ao_device;

 typedef struct ao_sample_format {
-       int bits; /* bits per sample */
-       int rate; /* samples per second (in a single channel) */
-       int channels; /* number of audio channels */
-       int byte_format; /* Byte ordering in sample, see constants below */
+       int  bits; /* bits per sample */
+       int  rate; /* samples per second (in a single channel) */
+       int  channels; /* number of audio channels */
+       int  byte_format; /* Byte ordering in sample, see constants below */
+        char *matrix; /* input channel location/ordering */
 } ao_sample_format;