Re: What is line level audio?



amdx wrote:

I want to set the output of a oscillator to drive an audio amplifier.

I thought a line input looks for 1vrms, is that a maximum amplitude for a
line input?

I went to google and found the following

""line-level Standard +4 dBu or -10 dBV audio levels.""

So I looked at +4dBu and -10 dBv and found,

""+4 dBu Standard pro audio voltage reference level equal to 1.23 Vrms.""

""-10 dBV Standard voltage reference level for consumer and some pro audio
use, equal to 0.316 Vrms. (Tip: RCA connectors are a good indicator of units
operating at -10 dBV levels.) ""

Seems to be some confusion

Not really. There's only 12dB difference ( 4x ) difference between the voltage
levels.

The +4dBu standard is the true professional one. -10dBV was introduced by Tascam
IIRC as a lower cost alternative for 'prosumer' kit. It's not really relevant
any more since modern electronics has the required headroom anyway.

Graham

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