I haven't blogged in a while.
I have been messing with the low cost Raspberry Pi computer for some off-network ham VOIP linking.
(The left-most (white FOB) is a CM-108 chipset; the Virtual 7.1 ch sound one is a CM-119, the LogiLink UA0053, and an unknown one.)
Adding a USB sound device is easy (as it doesn't have an on-board audio
input), configuring the mixer and getting the sample rate stuff right so
it works and sounds decent has been aggravating thus far.
I don't understand why it has to have custom configuration's defined/setup in .asoundrc, for various sample rates.
I am used to command line tools like play and record and sox just working with whatever I am trying to play.
If you are in the same boat as me, these threads seems to offer some clues:
For us hams you may want to check out these places to congregate:
And if someone comes up with a nice step by step how-to on the audio thing to share, please let me know!
This radioreference post seems pretty detailed. Here the thread author is adding a USB sound device to provide an input for use with DSD. However I wasn't successful with this either.
In the advent of cheap RF hardware, I have also been messing with GNU radio. Alas, seems I don't really have a fast enough computer to run it well. I was hoping a 3 GHz, P4 with be enough.
Never-the-less, while I seem to lack new topics, there are some older ones that perhaps someone in your local club can contribute to:
NWR SAME software decoder - Looks like someone has added EAS / SAME support to multimon
HSMM BDA -
P25 Software Repeater -
- App to enable all wireless channels on Android. This might be useful for amateur
And lastly, am I the only one that is disgusted with the series of QST articles on the variations of PL-259 installations?