[TangerineSDR] VLF 4-channel ADC

[David G. McGaw]

Yes, that is correct.  These are high-end consumer and professional 
audio components.

By the way, SACD is not anything special.  It is just a bit stream from 
a sigma-delta ADC modulator minus the FIR filter.  In fact, the original 
SACD spec was based on the 1986 vintage Analog Devices AD1879 in a test 
mode that outputs the 1-bit stream from its modulator.  This was never 
intended to be used this way, so the SACD spec audio actually has a 
tremendous amount of noise above 20kHz which was intended to be cut by 
the digital filter.  It was created by Sony because their CD patent had 
run out.  DVD-Audio was always the better format.

David N1HAC

On 10/26/20 11:40 PM, Jonathan wrote:
> David,
>
> Thank you for finding this! Scotty and I are looking at it now. It has 
> really good performance!
>
> Nathaniel,
>
> I think this will be a suitable replacement. It looks like it is 
> designed for recording high definition audio, like the kind of high 
> definition audio in SACDs and similar formats.
>
> Jonathan
> KC3EEY
>
> On Mon, Oct 26, 2020 at 11:04 PM David G. McGaw via TangerineSDR 
> <tangerinesdr at lists.tapr.org <mailto:tangerinesdr at lists.tapr.org>> wrote:
>
>     Here is an AKM 4-channel part that has extremely good THD+N and
>     dynamic
>
>     range and can do the full 192kHz bandwidth.  It can run up to 768kHz
>
>     sample rate with even greater bandwidth.  It also has DSD output that
>
>     would allow custom filters.
>
>
>
>     $13.02 from Digi-Key single part price!
>
>
>
>     https://www.akm.com/us/en/products/audio/audio-adc/ak5574en/
>     <https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.akm.com%2Fus%2Fen%2Fproducts%2Faudio%2Faudio-adc%2Fak5574en%2F&data=04%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7C7fb58d195baa408702a108d87a2a24a2%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C637393668722572399%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=X0lWwCacwLz6BLy0uvAD987%2BhCw%2F22XHrHPm3JPxbeI%3D&reserved=0>
>
>
>
>     73,
>
>
>
>     David N1HAC
>
>
>
>     -- 
>
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