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
5 Vrms
But the Input ( Mic Input ) in XLR is just over 3Vrms.
// Sal
From: Giuliano Pochini <pochini@xxxxxxxx>
To: S. Aguinaga <sa_jr@xxxxxxxxx>
Cc: alsa-user@xxxxxxxxxxxxxxxxxxxxx
Sent: Mon, July 6, 2009 5:19:38 PM
Subject: Re: .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_jr@xxxxxxxxx> 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:
giu@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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