[hpsdr] Balanced audio on future boards

[Matthew J Wolf]

I do not want to have to rely on software running on a PC with a monitor 
to listen to the audio.  I do not like that you need a GUI based program 
to "listen" to a Hermes-Lite.

It's there any software that does not have a GUI that can control and 
decode the audio of the HPSDR hardware?  There are some use cases that 
do not need a GUI.



The best thing to do would be to provide digial audio I/O.

The minimum could be headers for the I2S lines.  The user then could use 
what ever audio transmitter and receiver they want. May be just replace 
the codec with a SPDIF / AES3 transceiver?

-Matt, N4MTT


On 12/01/2015 05:30 PM, hpsdr-request at lists.openhpsdr.org wrote:
 > ate: Tue, 1 Dec 2015 13:10:48 -0800
 > From: Jim Barber<barberaudio at gmail.com>
 > To: "H.A.Meijer"<meijer.ha at home.nl>
 > Cc:hpsdr at openhpsdr.org
 > Subject: Re: [hpsdr] Balanced audio on future boards
 > Message-ID:
 > 	<CAO3SKEGxYFkCRpbU2fJmwpBcLxKda+CTQFrjgS-FnC0CkyF4tg at mail.gmail.com>
 > Content-Type: text/plain; charset="utf-8"
 >
 > There's nothing wrong with that, but it leaves out remote use and other
 > platforms like Linux, Android, MacOS and IOS.
 >
 > Also, the last time I used it ASIO was proprietary to Steinberg and not
 > appropriate for distribution with open-source
 > software. I don't know if it's still that way but since Audacity still
 > doesn't support ASIO I suspect so.
 >
 > 73,
 > Jim N7CXI
 >
 > On Tue, Dec 1, 2015 at 1:02 PM, H.A.Meijer<meijer.ha at home.nl>  wrote:
 >
 >> >***** High Performance Software Defined Radio Discussion List *****
 >> >
 >> >
 >> >Hi Jim,
 >> >
 >> >Yes, possibility's are endless.
 >> >But as already mentioned before, it can be done now,  just by using the
 >> >VAC.
 >> >
 >> >Let VAC 'talk' to a VST-host<http://www.audiomulch.com/>  and then you
 >> >can use all the now available (free) VST audio plug-ins
 >> ><https://talkinmusic.com/musicproduction/top-100-free-vst-plugins/>.
 >> >What about powersdr having a simple VST-host build-in?.
 >> >
 >> >73'Bert
 >> >
 >> >***** High Performance Software Defined Radio Discussion List *****
 >> >
 >> >
 >> >
 >> >
 >> >Ended up sending this only to Bert by mistake:
 >> >
 >> >Hi Bert,
 >> >
 >> >I'd like to suggest that instead of PowerSDR connecting to the 
sound card
 >> >directly that a network streaming audio interface be added
 >> >(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
 >> >an open-source audio compression codec.
 >> >
 >> >The "remote" app could run on the*same Windows computer as 
PowerSDR*  using
 >> >an ASIO audio device, kernel streaming,
 >> >bluetooth headset etc. or it could be an Android tablet running 
remotely
 >> >over wireless, a Linux desktop, a phone ... and so on.
 >> >
 >> >Once the streaming interface was implemented, the PowerSDR developers
 >> >could continue to work on PowerSDR, and other developers
 >> >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
 >> >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
 >> >branch of PowerSDR, but I could be responsible for my own audio app, as
 >> >could other developers.
 >> >
 >> >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
 >> >without a virtual serial port, which again complicates things. Perhaps
 >> >virtualizing the CAT command set using a separate socket or
 >> >UDP port along side the audio streaming might work.
 >> >
 >> >Just thinking out loud...
 >> >Jim N7CXI
 >> >