Re: 192kHz usb audio patch for Teensyduino - testers?
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I have the 192k audio working on my Ubuntu box along with my CAT code. It is working well with WSJT-X.
Still needs some workmore testing.
-- John G0ORX
On Mon, 5 Aug 2024, 14:54 Graham Whaley via , <graham.whaley= [email protected]> wrote: Indeed, it didn¡¯t feel like it should be working unless it was a feature of exact division/sampling (which, 44.1 isn¡¯t, but 48 would have been)¡
In a recent look around for some dsp routines (particularly I was looking for frequency shifters), I think I saw that the wdsp library has rate independent resamplers. Might be worth having a look at
73, Graham, 2E0WRW
> On 5 Aug 2024, at 12:13, Greg KF5N via <greg.electricity=[email protected]> wrote:
>
> I was also wondering how that worked at 192 ksps without change.? That is in fact remarkably robust demodulation and decoding!
> I am also wondering if interpolation from 192 to 44.1 ksps is possible.? At least according to my textbooks, arbitrary rate conversion is possible.
>? ?The reason I am interested in a multi-rate T41 is for both the transmitter, which needs 48ksps now for CESSB, and also a possible future
> more compact version of the T41 for portable use.? Decreasing the sample rate should significantly decrease the receiver power consumption.
>? ?--
> 73 Greg KF5N
>
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