search

AndyTaylorTweet / Pi-Star_v4_Binaries_Bin

Repository for Pi-Star Binaries
http://www.pistar.uk
25 stars 16 forks source link

Feature Request: Decode AMBE for Pi-Star audio output #2

Open NyxoLyno opened 4 years ago

NyxoLyno commented 4 years ago

Request use of AMBE decoder tools (https://github.com/g4klx/AMBETools/blob/master/README.md) be added to Pi-Star to allow decoding of audio to be played through Raspberry Pi audio headphone jack.

It would "appear" as though incorporation of these AMBE decoder tools would allow incoming and outgoing AMBE signals be decided and played.

Correct me if I'm wrong, please.

MW0MWZ commented 4 years ago

Do you have an AMBE3000 Vocoder chip?

NyxoLyno commented 4 years ago

I will gladly buy a DVStick 30. https://www.gigaparts.com/dvmega-dvstick-30.html

MW0MWZ commented 4 years ago

OK - well some good and bad news - if you look further at what this does, it will transcode captured ambe or imbe data into a wav, it will NOT stream the life stream magically out of the speaker, if it did that - I would already include it.

NyxoLyno commented 4 years ago

What about this? https://www.hamradio.com/detail.cfm?pid=H0-017021

MW0MWZ commented 4 years ago

So that is an AMBE device for transcoding streams, but as yet I don't think the software has caught up. There is DummyRepeater - but that is D-Star only.

The closest thing I have seen to what you want is the DV-Cast, it has an onboard SPC and onboard AMBE board, and can be used as either a hotspot or gives you direct decode to audio. Does that help?

NyxoLyno commented 4 years ago

Not exactly. So, I have a dual band DVMega, and Pi-Star is capable of receiving and transmitting this packet traffic through a DVMega, Zumspot, etc. What I'm asking is, why can't that same data also be passed through something like a DV-Stick simultaneously for decoding and passed through the audio port? The hardware and software are capable of making such a connection, but Pi-Star would need to be configured to make that data available to both.

NyxoLyno commented 4 years ago

This article demonstrates using an RTL-SDR and software to obtain and decode Iridium satellite signals. https://www.rtl-sdr.com/dragonos-decoding-iridium-satellites-with-the-iridium-toolkit-and-an-rtl-sdr/

One of the software tools it uses is an AMBE decoder. There is no AMBE chip in this setup, yet, he is able to decode and play AMBE voice.

The question is, if this setup can be done with an RTL-SDR, why can't a Raspberry Pi with Zumspot/DVMEGA/MMDVM attached? They receive the signals (like an RTL-SDR), so why not incorporate the AMBE decoder to play the audio?

neiroman2k commented 2 years ago

No chance to convert wav to ambe without AMBE3000 stick ?