<p dir="ltr">Hi,<br>
I installed the new version and audio output is heard only one side of the speakers, I uninstalled and returned to the previous version and works well.<br>
it can be a problem for the new version? I uninstalled and installed first and the problem continues.</p>
<p dir="ltr">73<br>
EA8CSD.</p>
<div class="gmail_quot<blockquote class=" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">***** High Performance Software Defined Radio Discussion List *****<br>
<br>
All,<br>
<br>
PowerSDR/OpenHPSDR mRX PS v3.2.28 has been released.<br>
<br>
This release can be downloaded from the <a href="http://openhpsdr.org" rel="noreferrer" target="_blank">openhpsdr.org</a> website.<br>
<a href="http://openhpsdr.org/download.php" rel="noreferrer" target="_blank">http://openhpsdr.org/download.php</a><br>
<br>
This release contains the following changes:<br>
<br>
Radio Astronomy (RA) Joe, K5SO<br>
- added Rx2 to the RA feature to allow both Rx1 and Rx2 data to be<br>
simultaneously collected/viewed<br>
- added a new control to the RA display to allow the selection among options<br>
of<br>
1) simultaneous display of Rx1 data and Rx2 data,<br>
2) display of Rx1 data only, or<br>
3) display of Rx2 data only<br>
- added Rx2 data to the read/write-to-disk option from the RA window; data<br>
format for each line of the .csv file is<br>
time(secs), Rx1(dBm), Rx2(dBm)<br>
regardless of what option is selected for display in the RA window<br>
- added a compiler directive to try to resolve the EU vs US formatting issue<br>
of the previous RA read/write to .csv files<br>
<br>
Spectral Noise Blanker (SNB)<br>
<br>
Following the release of new Noise Reduction technology, NR2, earlier this<br>
year, this release includes another new tool for your "Noise<br>
Toolbox": SNB, a Spectral Noise Blanker. There are many different types of<br>
noise/interference and so having an assortment of tools at your disposal is<br>
of great benefit. The Spectral Noise Blanker is of a very different type<br>
than our Wideband blankers, NB and NB2, and will address some additional<br>
impulse noise issues. It can be used along with NB/NB2 when beneficial. It<br>
also plays quite nicely with NR/NR2 to address both Impulse Noise (SNB) and<br>
Random Noise (NR/NR2) simultaneously.<br>
<br>
While NB/NB2 operate on wideband spectrum data and impact both the<br>
panadapter display and the S-meter, SNB operates differently and impacts<br>
only audio. SNB uses Linear Predictive Coding (LPC) to evaluate the<br>
spectral formants of its input. It then uses that spectral information to<br>
identify impulses and to synthesize replacement samples for the signal in<br>
regions where it has been corrupted by those impulses. Yes, it does not<br>
just zero or interpolate across corrupted samples, it synthesizes<br>
approximations of the original signal using the spectral information and the<br>
samples before and after the impulse. This technology largely does not<br>
depend upon amplitude to identify impulses; therefore it can often detect<br>
impulses that are equal to or smaller than the amplitude of the signal and<br>
can clean signals when other blankers fail. Computing replacement samples<br>
requires quite a bit of matrix computation; so, to keep compute requirements<br>
within reasonable limits, SNB currently restricts audio bandwidth to roughly<br>
300Hz to 5400Hz.<br>
This was a design tradeoff which will be revisited as faster processors<br>
become available.<br>
<br>
To turn this blanker on, simply click the "SNB" button on the main console.<br>
(Note that NB and NB2 have now been moved to the same<br>
button.) In Setup, there are a couple threshold adjustments, "Threshold 1"<br>
and "Threshold 2". However, the algorithm is self-adjusting and you<br>
probably will not be able to achieve much improvement by fine tuning these.<br>
<br>
Summary of your current Noise-Interference Toolbox:<br>
<br>
Impulse Noise<br>
* NB (Wideband)<br>
* NB2 (Wideband)<br>
* SNB (Spectral)<br>
<br>
Random Noise<br>
* NR (Variable-Leak LMS Algorithm)<br>
* NR2 (Signal/Noise Power Density Algorithm)<br>
<br>
Carriers & Similar<br>
* ANF (Automatic Notch Filter - Variable-Leak LMS)<br>
<br>
Noise / Interference Null<br>
* Diversity Reception [Requires a radio model with two ADCs]<br>
<br>
Peaking Filters<br>
* Audio Peaking Filter [for CW]<br>
* Dolly Filter [for RTTY]<br>
<br>
Expect future additions!<br>
<br>
Various Bug Fixes and features<br>
- added the ability to split the open collector outputs between VFOA (1-4)<br>
and VFOB (5-7). To use, click on the "4x3 Split" checkbox on the<br>
Setup=>General=>(Penny/Hermes/ANAN Ctrl) page.<br>
- added a 'mask' field to the static IP address feature. This allows using<br>
the correct broadcast address for the specific port the radio is on. This<br>
corrected a problem when using a static ip address when multiple adapters<br>
are present. See the Setup=>General=>Hardware Config page.<br>
- added multilingual for ToolTip comments<br>
- fixed the 6m panadapter display reading for the Anan-10E<br>
- fixed a problem with PowerSDR crashing on startup when the Disable PA for<br>
HF/VHF is enabled<br>
- fixed an intermittent issue with diversity<br>
<br>
<br>
You WILL need to reset your database.<br>
If you have release v3.2.28 dated prior to 3 Oct 2015 you will need to<br>
manually uninstall it before installing this release. The installer will not<br>
automatically uninstall it for you. This only applies to the pre-release of<br>
v3.2.28 and not prior version numbers.<br>
<br>
Thanks & 73,<br>
<br>
Doug, W5WC<br>
Warren, NR0V<br>
<br>
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