[GreenKeys] FSK Audio files for Test and Evaluation. Now 6 bit

John Spigel w1an.dxusa at gmail.com
Thu May 22 21:32:05 EDT 2025 

Jeff, interesting. I've loaded several files on a simple mp3 player and 
they work OK with an audio cord to a TU. I've also played them off a 
phone or RazPi using BT with $3 BT 5.0 card bought from Amazon.

Some mp3 players may have buttons you could title to select specific 
files. So that's also an option. Adding a preample to the audio file 
would an option if you plan on hearing the tones go out. This might best 
be used for short specific navy format files with historical content 
that run on demand with no attendant. Long files might best be used if 
there is an operator nearby.

There are simple options and more complex ones if you want to 
simultaneously print or select from a screen. Might even dedicate an old 
smartphone (no service needed) and play saved files.

I'll look at your first suggestion. Sounds simple enough. Maybe you can 
come up with some stock navy messages you'd like to use. Even a welcome 
aboard message!

John

On 22-May-25 20:55, Jeff G wrote:
> Going back to the files - one suggestion that may or may not be helpful; 
> if you can have a voice describing the file before the meat plays. For 
> example:
> 
> Battleship wiki 850shift 45 baud
> 
> The reason I mention this, is because I may try to leverage a cheapo MP3 
> player or something on the ship as there's no internet access there. Yes 
> I can also do a "better" mp3 player with screen and all, but if I (or 
> anyone) happens to be playing the files blind (let's really go out in 
> left field and say even from a CD!), then the file has an audio header 
> the describes what it is.
> 
> I guess another use case may be if the file name gets changed by 
> accident per se too.
> 
> Just a thought!
> 
> Jeff
> 
> On Mon, May 5, 2025 at 10:24 PM John Spigel <w1an.dxusa at gmail.com 
> <mailto:w1an.dxusa at gmail.com>> wrote:
> 
>     Yes, Lots of potential with software! I have many ideas swimming in my
>     head. But I'll work with the easier ones. Sharing is encouraged!
> 
>     For anyone with a 6 bit machine I just posted an mp3 afsk file for
>     testing at 6bit, 45.45 170 shift on 5bits.net <http://5bits.net>. I
>     assumed 45.45 but
>     couldn't find much more detail.
> 
>     I can't fully decode 6 bit here but perhaps there is someone working on
>     a 6 bit machine from the newspaper publishing business. Let me know if
>     its successful pringting some upper and lower case RYRY...ryry...
> 
>     73, John W1AN
> 
>     On 02-May-25 13:59, Zach Tumbusch wrote:
>      > I have some AFSK audio available at any shift and any baud
>     rate (tested
>      > up to 9600) baudot that is generated on the fly by NodeJs / .NET
>     Core
>      > and downloadable as mp3. It would be cool if I could get some
>     users out
>      > there doing some testing and making suggestions. Mainly
>     suggestions for
>      > neat content. At the moment it will generate an up to date 24
>     weather
>      > forecast for your location and some other things like ARRL
>     bulletins.
>      > Let me know what you think. https://w8zjt.net/itty <https://
>     w8zjt.net/itty> <https://w8zjt.net/itty <https://w8zjt.net/itty>>
>      >
>      > thanks
>      > -Zach W8ZJT
>      >
>      > On Fri, May 2, 2025 at 1:26 AM hwhall--- via GreenKeys
>      > <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net>
>     <mailto:greenkeys at mailman.qth.net
>     <mailto:greenkeys at mailman.qth.net>>> wrote:
>      >
>      >     I've created some AFSK files using MMTTY with text file input,
>      >     connecting laptop audio out back to the mic input & recording
>     with
>      >     Windows Recorder. Seems to work fine.
>      >
>      >     Wayne
>      >     WB4OGM
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