image.
+Duplex Streams
+==============
+
+Note that when attempting to use a single device file for playback and
+capture, the OSS API provides no way to set the format, sample rate or
+number of channels different in each direction. Thus
+ io_handle = open("device", O_RDWR)
+will only function correctly if the values are the same in each direction.
+
+To use different values in the two directions, use both
+ input_handle = open("device", O_RDONLY)
+ output_handle = open("device", O_WRONLY)
+and set the values for the corresponding handle.
+
+
Unsupported Features
====================
the buffer as the conventional (mono or 2-channels, 8 or 16bit) format
on OSS.
-USB devices
------------
-Some USB devices support only 24bit format packed in 3bytes. This
-format is not supported by OSS and no conversion is provided by kernel
-OSS emulation. You can use the user-space OSS emulation via libaoss
-instead.
-