Re: [LAU] maximum input level, or normalization and dc offset correction?

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To: <linux-audio-user@...>
Date: Saturday, July 13, 2013 - 11:44 am

On Fri, Jul 12, 2013 at 02:59:03PM -0400, Bill Gribble wrote:

> AFAICT "best practice" with modern equipment is to basically work as if

Agreed 100%. With 24 bits you have a lot of headroom, and any
'digital gain' used post-recording won't affect the real S/N
ratio at all.

A working level of -20 dB RMS FS will preserve the full dynamic
range even if you have to boost the signal later.

A high end preamp/AD such as the RME Micstasy will have a S/N
ratio of around 120 dB maximum when configured for a high level
line input. With typical gain settings for e.g. recording an
acoustic instrument it will be around 100 dB. Most mic preamps
will give you much less, and we're ignoring mic self noise and
ambient noise. In many cases the latter will determine the real
S/N ratio you can have. If you're recording electronic instruments
they and the DI-box will determine the noise floor. It won't be
near anything that 20 bits can't handle.

Anyway, for music with a restricted dynamic range (that includes
almost everything presented/discussed here) this is completely
academic. You could record the tracks at -40 dB FS and nobody
would notice.

Ciao,

--
FA

A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)

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Messages in current thread:
Re: [LAU] maximum input level, or normalization and dc offse..., Ricardus Vincente, (Fri Jul 12, 6:18 pm)
Re: [LAU] maximum input level, or normalization and dc offse..., Fons Adriaensen, (Sat Jul 13, 11:44 am)
Re: [LAU] maximum input level, or normalization and dc offse..., Ricardus Vincente, (Fri Jul 12, 8:20 pm)