[hpsdr] Balanced audio on future boards

[H.A.Meijer]

Just to correct my info on the maya44,
It has symmetrical (mic) inputs, the outputs are (stereo) asymmetrical.


Op 1-12-2015 om 19:44 schreef H.A.Meijer:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Hi Matt,
>
> One can also think about completely deleting the Hardware audio in- 
> and output and doing it at the pc/soft- and hardware.
> For now you can do it using VAC and a sound-card.
>
> Look for example at an ESI maya44 
> <http://www.esi-audio.com/products/maya44/>, it has symmetric in and 
> outputs, even an microphone input with phantom +48V,
> and very low latency (ASIO) and not to expensive .
> 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.)
>
> Maybe in the future, (not knowing if possible?) HP-Powersdr can skip 
> the need for VAC and approach the sound-card directly(?).
>
> 73'
>  Bert PA2XHF
>
>
>
> Op 1-12-2015 om 17:52 schreef Matthew J Wolf:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Has there been any thought of including balanced audio input and 
>> output on the future HPSDR boards?
>>
>> One would think it would be as easy as using a different codec. A 
>> codec that provides both single ended and balanced audio.
>>
>> 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.
>>
>> I have looked at the schematics and the PCBs for Mercury, Pennylane, 
>> and Hermes. There is no "easy" way to add balanced audio.
>>
>> -Matt, N4MTT
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