User talk:AB2KT
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Brownian Noise on SVN
Further work on buffer issues in Rev 184
Following up on the corner issues raised by widely different DSP and audio buffer sizes.
Bug fix only in Rev 168
John G0ORX/N6LYT discovered that the two-tone test generator was producing only one tone. He found the missing second tone, however. His correction is in -ng and -ol.
setTXFiltCoefs and setRXFiltCoefs in Rev 166
I know you've been waiting for this: a way to plug your own filter coefficients into the RX or TX chain. Well, here it is. See setRXFiltCoefs() and setTXFiltCoefs() in update.c. Contemplate how they're equivalent to walking a tightrope across Lion's Gate Span without a net.
Nevertheless they're right there, if you need to plug in your own filters.
RX and TX gain control in Rev 162
Rev 162 comprises some changes I've been resisting for a long time: input and output gain settings for both RX and TX. They are controlled by the command
setGAIN TRX IO [gain]
where
- TRX == 0 means RX, 1 means TX
- IO == 0 means input, 1 means output
- gain is in dB, if present (no arg means reset to 0 dB, ie no scaling)
The setRXGain command is now strongly deprecated. (It's in the bit bucket.)
John G0ORX/N6LYT has already incorporated and tested most of the new features in his console. He's denominated the output control "AF Gain" and the inputs "IF Gain" and "Mic Gain" on RX and TX respectively. Conveys the correct idea even if not perfectly accurate. The new controls are in the latest rev at the java-sdr svn.
John is also working to make his virtual world console in MPK20 available over the net.
--Frank 08:17, 23 January 2008 (PST)
Rev 164
- The -ol branch is now current with the latest -ng branch. In other words, -ng and -ol are identical except that -ol uses filesystem reads and writes for audio I/O. In support of that there is also an additional layer of threading to overlap I/O and computation.
- The -rs branch has been deleted. The only functional difference between it and -ol were the now-defunct resampling code, so it was superfluous.
--Frank 08:05, 25 January 2008 (PST)
Contact me
ab2kt@arrl.net works. Also 908.240.7358, although I rarely answer the phone because there might be somebody on the other end. ab2kt@jabber.org if you're in a hurry. Jabber is cool.
vr-sdr?
Requesting comments on how vr-sdr.org and vr-sdr.com should be coordinated with dttsp.org and this wiki.
--Frank 07:46, 22 January 2008 (PST)
vr-sdr!
The Erlang Virtual Radio URLs http://vr-sdr.org, http://vr-sdr.net, and http://vr-sdr.com now have a home, thanks (again!) to Don AE5K. He's also separately set up http://vr-sdr.org/wiki. We'll be starting to populate the pages over the next week or so.
--Frank 08:20, 23 January 2008 (PST)
