Added a sentence to ao_waveform description.

diff --git a/demo/README b/demo/README
index 2c4ab6c60d277df040db8deb9be9cb3db81eda0f..b9e44383f546b1ce801d4bdc895026fd37abc4d8 100644 (file)
--- a/demo/README
+++ b/demo/README
@@ -23,7 +23,9 @@ DEMO PROGRAMS:
 ao_waveform:
        You need a device (and driver) capable of streaming analog output,
        which currently is some of the members of the NI AT-MIO and PCI-MIO
-       E series.  Creates a sine wave on an analog output channel.
+       E series.  Creates a sine wave on an analog output channel.  You
+       can specify the frequency of the generated sine wave on the
+       command line.
 
 board_info:
        Displays some information that Comedi knows about a device.