<div dir="ltr">Ended up sending this only to Bert by mistake:<div><br></div><div><span style="font-size:12.8px">Hi Bert,</span><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">I'd like to suggest that instead of PowerSDR connecting to the sound card directly that a network streaming audio interface be added</div><div style="font-size:12.8px">(if it doesn't already exist) that would allow developers to build apps on any platform to send/receive basic audio and PTT data using</div><div style="font-size:12.8px">an open-source audio compression codec.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">The "remote" app could run on the <b>same Windows computer as PowerSDR</b> using an ASIO audio device, kernel streaming,</div><div style="font-size:12.8px">bluetooth headset etc. or it could be an Android tablet running remotely over wireless, a Linux desktop, a phone ... and so on.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Once the streaming interface was implemented, the PowerSDR developers could continue to work on PowerSDR, and other developers</div><div style="font-size:12.8px">could write nice audio interface apps for it. For example, I might be interested in writing a Windows and/or Linux app that would add multi-band</div><div style="font-size:12.8px">compression, parametric EQ and other features to the audio chain. I don't have the time or desire right now to be responsible for an entire</div><div style="font-size:12.8px">branch of PowerSDR, but I could be responsible for my own audio app, as could other developers.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Parts of it could be done right now using VAC to interface to PowerSDR, but that seems clumsy to me. It also wouldn't allow for PTT</div><div style="font-size:12.8px">without a virtual serial port, which again complicates things. Perhaps virtualizing the CAT command set using a separate socket or </div><div style="font-size:12.8px">UDP port along side the audio streaming might work.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Just thinking out loud...</div><div style="font-size:12.8px">Jim N7CXI</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Dec 1, 2015 at 10:49 AM, H.A.Meijer <span dir="ltr"><<a href="mailto:meijer.ha@home.nl" target="_blank">meijer.ha@home.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">***** High Performance Software Defined Radio Discussion List *****<br>
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<div>Just to correct my info on the maya44,<br>
It has symmetrical (mic) inputs, the outputs are (stereo)
asymmetrical.<br>
<br>
<br>
Op 1-12-2015 om 19:44 schreef H.A.Meijer:<br>
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<div>Hi Matt,<br>
<br>
One can also think about completely deleting the Hardware audio
in- and output and doing it at the pc/soft- and hardware.<br>
For now you can do it using VAC and a sound-card.<br>
<br>
Look for example at an <a href="http://www.esi-audio.com/products/maya44/" target="_blank">ESI maya44</a>,
it has symmetric in and outputs, even an microphone input with
phantom +48V,<br>
and very low latency (ASIO) and not to expensive .<br>
I have tested it on my sdr-pc and it works very good (it even
solved my audio distortions during zooming and panning the
panadaptor, h.i.)<br>
<br>
Maybe in the future, (not knowing if possible?) HP-Powersdr can
skip the need for VAC and approach the sound-card directly(?).<br>
<br>
73'<br>
Bert PA2XHF<br>
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Op 1-12-2015 om 17:52 schreef Matthew J Wolf:<br>
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Has there been any thought of including balanced audio input and
output on the future HPSDR boards? <br>
<br>
One would think it would be as easy as using a different codec.
A codec that provides both single ended and balanced audio. <br>
<br>
Having unpopulated headers on the board for the balanced audio
would be fine. I admit that there would be a minority that would
want balanced audio. <br>
<br>
I have looked at the schematics and the PCBs for Mercury,
Pennylane, and Hermes. There is no "easy" way to add balanced
audio. <br>
<br>
-Matt, N4MTT <br>
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