Just to close the loop on this: I consistently measure just over 7 V peak and 
about 

5 Vrms 

But the Input ( Mic Input ) in XLR is just over 3Vrms.

// Sal 




________________________________
From: Giuliano Pochini <poch...@shiny.it>
To: S. Aguinaga <sa...@yahoo.com>
Cc: alsa-user@lists.sourceforge.net
Sent: Mon, July 6, 2009 5:19:38 PM
Subject: Re: [Alsa-user] .asoundrc for layla3g && aplay error: set_params:959: 
Channels count non available

On Wed, 24 Jun 2009 18:54:50 -0700 (PDT)
"S. Aguinaga" <sa...@yahoo.com> wrote:

> Thank you Giuliano!!
> 
> BTW: do you have a recommendation to test/check the maximum output level of 
> the 
>Layla3G.  The specs say that is capable  of 114dB( A weighted) ... I used 
>alsamixer to turn up the volume all the way up for this device, but when I 
>measure the output ... I got something like 300mV(rms) and I would expect this 
>to be about 6.5-7.5Vrms (max).

(Oops, I overlooked your message in my overloaded mailbox)

114dB is the S/N ratio. The output level is either 1.28V (+4dBu) or 0.33V
(-10dBV), according to the setting of this control:

g...@jay ~ $ amixer contents
[...]
numid=2,iface=MIXER,name='Line Playback Switch (-10dBV)'
  ; type=BOOLEAN,access=rw------,values=6
  : values=off,off,off,off,on,on
[...]


-- 
Giuliano.



      
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