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-rw-r--r--DOCS/man/ao.rst8
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diff --git a/DOCS/man/ao.rst b/DOCS/man/ao.rst
index 5beca55384..3fc1ba9734 100644
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@@ -112,6 +112,14 @@ Available audio output drivers are:
``openal``
Experimental OpenAL audio output driver
+ ``--openal-num-buffers=<2-128>``
+ Specify the number of audio buffers to use. Lower values are better for
+ lower CPU usage. Default: 4.
+
+ ``--openal-num-samples=<256-32768>``
+ Specify the number of complete samples to use for each buffer. Higher
+ values are better for lower CPU usage. Default: 8192.
+
``--openal-direct-channels=<yes|no>``
Enable OpenAL Soft's direct channel extension when available to avoid
tinting the sound with ambisonics or HRTF.