[sugar] generate clean tone to speakers (first prototype of working EKG around the XO )

[Arjun Sarwal]

Tom,

>
> Arjun, could you suggest an activity that gives a good clean example of
> sending sound to the speakers? Thanks.
>
>
You could use gstreamer (the same package the measure uses to grab audio data)
to create a pipeline, a command line example is below which generates
a sine of 500Hz

 gst-launch-0.10 audiotestsrc wave=sine freq=500 ! audioconvert ! alsasink

In python you could create a pipeline and implement it similar lines
to that given in audiograb.py in the Measure code.


I think it is possible to generate tones using Csound too and perhaps
other Activities are doing it, but I'm not aware of them.


regards
Arjun

---
Arjun Sarwal
Intern at One Laptop per Child
<arjun at laptop.org>
http://laptop.org/