<div dir="ltr"><div>Do whatever you want. I can't explain it to you any more clearly.<br><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 18, 2016 at 10:25 AM, Len Ovens <span dir="ltr"><<a href="mailto:len@ovenwerks.net" target="_blank">len@ovenwerks.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Sun, 17 Jul 2016, Robert Edge wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
If you don't believe me, do this simple test:<br>
<br>
feed a 1kHz tone in to the input<br>
<br>
set 'analog volume' control in software to 0dB<br>
<br>
connect to ardour or your choice of recorder with decent metering. set meter<br>
point to 'in'<br>
<br>
increase volume of test signal until you are getting 0dBFS. no matter how much<br>
you increase the level of the test signal from here it will continue to read<br>
0dbFS. turn the signal generator up a good few dB so you are well in to<br>
clipping.<br>
<br>
record a bit of this. you will see a squared off wave.<br>
<br>
now turn down the 'analog volume' control until you are seeing a nice comfortable<br>
level. do not change the level of the test signal generator.<br>
<br>
record again.<br>
<br>
the result will still be clipped.<br>
<br>
in fact it will be identical to the first signal you recorded, just scaled down.<br>
<br>
I mean, you guys do whatever you want, but that is what is actually happening in<br>
your signal chain.<br>
</blockquote>
<br></span>
How do you know this is digital and not analog clipping? The result would look the same.<br>
<br>
signal path:<br>
<br>
AC -> resitor -> buffer -> digitally -> ADC<br>
in pad on amp controlled<br>
card analog gain<br>
<br>
if the input signal after the input pad has p-p higher than amp's power rails allow, the signal will be squared off, just as you are seeing. The gain stage would be a part of the ADC chip BTW. The buffer amp is probably not, but rather a gain stage added to allow the use of mic level inputs. (M-Audio advertise it as a Mic Pre)<br>
<br>
--<br>
Len Ovens<br>
<a href="http://www.ovenwerks.net" rel="noreferrer" target="_blank">www.ovenwerks.net</a><br>
</blockquote></div><br></div>