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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _AUDIO_SET_ID:
+
+============
+AUDIO_SET_ID
+============
+
+Name
+----
+
+AUDIO_SET_ID
+
+
+Synopsis
+--------
+
+.. cpp:function:: int  ioctl(int fd, int request = AUDIO_SET_ID, int id)
+
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals AUDIO_SET_ID for this command.
+
+    -  .. row 3
+
+       -  int id
+
+       -  audio sub-stream id
+
+
+Description
+-----------
+
+This ioctl selects which sub-stream is to be decoded if a program or
+system stream is sent to the video device. If no audio stream type is
+set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for
+AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for
+other stream types. If the stream type is set the id just specifies the
+substream id of the audio stream and only the first 5 bits are
+recognized.
+
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.