Added missing doc for a field

diff --git a/doc/asoundrc.doc b/doc/asoundrc.doc
index 249eb16..0033b5d 100644 (file)
--- a/doc/asoundrc.doc
+++ b/doc/asoundrc.doc
@@ -116,6 +116,9 @@ pcm.NAME {
   slave {              # Slave definition or name
     pcm STR            # Slave PCM name
   }
+  file STR             # File name
+  # or
+  file INT             # File descriptor
   [format STR]         # File format (NYI)