[linux-audio-user] Clipping from USB audio device

Paul Winkler pw_lists at slinkp.com
Fri Jun 6 10:57:01 EDT 2003


On Fri, Jun 06, 2003 at 09:37:55AM +0200, Clemens Ladisch wrote:
> Tim wrote:
> > Kai Vehmanen wrote:
> > > ecasignalview -f:16,2,48000 /dev/dsp1 null
> >
> > Works, I've attached the output of 30 seconds analysis from my amp as
> > source, as well as the portable CD player which doesn't have the
> > clipping problem.
> > [...]
> > Would it be possible I've bought a dud analogue-digital converter, which
> > suffers clipping at normal line volume?
> 
> This would be theoretically possible, but IMHO it's more probable that
> your amp produces more than standard line volume, "just to be sure".


Remember also that there are two standards for line level:
"pro" (+4) and "consumer" (-10).  THere's about 14 dB difference
between them.  I say "about" because IIRC they use different
references for 0 dB or something. But "pro" really is a lot louder.

-- 

Paul Winkler
http://www.slinkp.com



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