+The default is taken from the
+.B rtp_rcvbuf
+configuration parameter.
+.TP
+.B \-\-monitor\fR, \fB\-M
+Periodically report how close to the buffer low watermark the buffer is.
+If you have trouble with poor playback quality, enable this option to see if
+the buffer is emptying out (or overfilling, though there are measures to
+prevent that from happening).
+.SS "Deprecated Options"
+These options may be removed in a future version.
+Use \fB\-\-api\fR instead.
+.TP
+.B \-\-alsa\fR, \fB\-a
+Use ALSA to play sound.
+Only available on Linux.
+.TP
+.B \-\-oss\fR, \fB\-o
+Use OSS to play sound.
+Only available on Linux and FreeBSD.
+.TP
+.B \-\-core\-audio\fR, \fB\-c
+Use Core Audio to play sound.
+Only available on Macs.