It’s summer and this that sitting at home behind the computer is not always the first priority.
It has been a month since the last post; so here some updates on different projects:
Concerning the D-STAR voice-announcement package, Ken, KE2N, discovered there is an issue with the text-messages send allong the voice-announcements:
If the text-message, which is located in the slow-data part of the voice-announcement, is repeated to quickly, certain D-STAR radios will not show the complete message on their screen. After some experiements with different settings by Ken, the voice-announcement code was changed so that the D-STAR text-message is repeated every 2 seconds multiplied by the number of characters in the message.
The updated source-code is available on github: https://github.com/on1arf/voice-ann
Thanks to ken for troubleshooting this issue.
Bobby, KF4GTA, has activated an internet-stream of the D-STAR repeater W4VLD of the Valdosta Amateur Radio Club; using the DSTK (D-STAR Switching matrix Toolkit). The system is currently still in test: click here to listen to it.
The current system uses the icecast streaming-server and vorbis ogg-based streaming souce-client ices but we would like to experiment with mp3 streaming too.
If somebody has any information on how to configure ezstream to stream/mp3-encode audio from standard-in, please feel free to drop us a note!
I have also taken the opportunity to do some cleanup of the DSTK code: ”cap2rpc” and “rpc2amb” have been updated and moved to a new folder: DSTK_v2.
Also, a new application has been added: “udpbounce“. This program can be used to move DSTK streams between different servers. The goal is have the server doing AMBE decoding (i.e. the server with the DVdongle) to be located on a different place then the PC used by the repeater.
The code for the DSTK can be found on github: https://github.com/on1arf/DSTK
The code of the GMSK modem has been changed so it can be optimised for different kinds of processors: especially concering the “multiply-and-add” commands used in the DSP code. By selecting an option in the Makefile, the source-code can now be compiled to use 64bit or 32bit integer math or floating point math. Also this code is available on github: https://github.com/on1arf/gmsk/tree/master/gmskmodem_codec2