[arm-allstar] Fwd: New Channel Driver Code in Debelopment

[David McGough]

David,

The CM108/CM119 isn't the limiting factor.  These adapters are already
running at a 48KHz sample rate, roughly flat frequency response from 30Hz
to 18KHz+ and 80dB+ usable dynamic range.  Here is one review of a bargain  
CM119 fob.  This is an "audiophile" review and they call this fob
"marginal."  ....For AllStar, we're not trying to re-play a rock concert 
through a 5KW sound system! (At least I'm not doing that!!!)

https://nwavguy.blogspot.com/2011/11/c-media-cm119-dac.html

This performance is FAR beyond even high-quality broadcast FM radio.

NOTE that some AllStar-centric audio fobs (like the DMK URI)  include
hardware filters that limit the frequency response.  However,  they won't 
impact communications-grade audio, either.


73, David K4FXC



On Fri, 29 Apr 2022, "David McAnally via ARM-allstar" wrote:

> Is our choice of a cheap audio hardware interface playing a role in the
> lack of desired frequency response? I may not be up to speed on the latest
> USB audio dongles in use, but a quick search on the CM108 for audio
> frequency response plots doesn't look all that impressive, at least if you
> plan on pushing limits.
> 
> David McAnally, WD5M
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