[Elecraft] Performance of internal USB sound system compared toexternal one?

[Ed Muns]

Yes, there are two receive audio channels for the Main and Sub receivers in
the CODEC.  The Windows driver level control adjusts both channels
identically.  If there is any unbalance or for some reason you want to
independently adjust the two channels, it can't be done.  The driver
communication with Windows should trigger the stereo level control, but
doesn't.

 

The CODEC is the TI PCM-2902.

 

Ed W0YK

 

  _____  

From: Jeff Stai [mailto:wk6i.jeff at gmail.com] 
Sent: 14 June, 2016 13:15
To: ed at w0yk.com
Cc: Robert Wood; Ken Arck; Elecraft Mailer
Subject: Re: [Elecraft] Performance of internal USB sound system compared
toexternal one?

 

 

On Tue, Jun 14, 2016 at 12:44 PM, Ed Muns <ed at w0yk.com> wrote:

One issue I have with the K3S CODEC is that Windows installs a monaural
level control rather than separate left and right channel level controls for
the two receive audio streams.  There also seems to be some kind of AGC
action going on where the levels actually change over time.  This appears to
be eliminated by the chip manufacturer's CODEC driver that I found online,
though it is still monaural.

 

You still have a left and right channel, you just can't set the levels
independently, correct?

 

I haven't seen the AGC issue, but maybe I haven't noticed the levels
changing very much. Who is the chip mfr?

 

Thanks! - jeff wk6i