[GreenKeys] Something silly

[Richard Knoppow]

    Also works in Edge.  In Firefox I just get a steady tone and have no 
control over it. I think perhaps its java support that is the problem.

On 1/23/2017 10:24 PM, keelan at beefchicken.com wrote:
> I got to thinking recently... Web browsers have gained better audio
> support in recent times, and it should be possible to generate AFSK
> tones entirely in the browser.
>
> And it is. I've put together a demo here:
>
> http://beefchicken.com/rtty/
>
> The interface isn't anything to write home about, this is just a quick
> wrapper for a clump of javascript code that makes the magic happen. A
> bit of random button mashing sound make the function of the poorly
> labeled buttons become apparent in short order. Basically, set up your
> mark/space frequencies and baud rate, and hit 'start audio'. If your
> browser works, you should hear the mark frequency. Poke the 'Encode'
> button and the AFSK will commence. This is all 'rendered' locally, if
> you load this page up it will continue to work even without an internet
> connection.
>
> I've tested it successfully with Chrome and Safari. Firefox doesn't work
> (haven't bothered to figure out why yet), and I can't be bothered to
> test it with IE, because I'm 98% certain IE doesn't have support for the
> features I'm using here.
>
> The source is available here:
>
> https://github.com/naleek/rttyjs
>
> I'm also working on a 'streaming' system that uses this code to generate
> the tones locally, based off of a live data stream, but I'm not sure
> it's worth the effort. It would mean a single 'radio station' could work
> with different baud rates/codes.
>
> - Keelan
> VE7NCR

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL