Sound component example:
-The sound component needs an additional parameter to determine the audio
-resolution that is going to be used. The following formats are available:
+The sound component needs additional parameters to determine the audio
+resolution that is going to be used and to trigger the registration of a
+sound card with ALSA. The following audio formats are available:
- "1x8" (Mono)
- "2x16" (16-bit stereo)
- "2x32" (32-bit stereo)
- "6x16" (16-bit surround 5.1)
- $ echo "mdev0:ep_81:sound:most51_playback.6x16" >$(DRV_DIR)/add_link
+To make the sound module create a sound card and register it with ALSA the
+string "create" needs to be attached to the module parameter section of the
+configuration string. To create a sound card with with two playback devices
+(linked to channel ep01 and ep02) and one capture device (linked to channel
+ep83) the following is written to the add_link file:
+ $ echo "mdev0:ep01:sound:most51_playback.6x16" >$(DRV_DIR)/add_link
+ $ echo "mdev0:ep02:sound:most_playback.2x16" >$(DRV_DIR)/add_link
+ $ echo "mdev0:ep83:sound:most_capture.2x16.create" >$(DRV_DIR)/add_link
+The link names (most51_playback, most_playback and most_capture) will
+become the names of the PCM devices of the sound card.
Section 2.3 USB Padding