Re: Max input level of a PC soundcard?



Spurious Response wrote:

Eeyore wrote:
Joerg wrote:

Hello Folks,

What's the max for soundcards? I have read specs of some where it says
22dbu which sounds wrong to me. A Via AC'97 I have seems to max out at
10mV RMS but no clue if that is a standard. There was no datasheet on
the Via Technologies site. Also, anyone know the "frying level" where it
would go kaputt?

There seem to be absolutely no standards whatever for this.

Bullshit. It is audio industry standard (DIN among others).

If you think there's a standard for souncard operating levels I'd be delighted to
know.

In any case it seems sound card amnufacturers don't adhere to any standard.


Most likely STANDARD "line level" inputs.
Apparently Creative won't even publish (or tell you on request) the numbers for
the Soundblasters.

They certainly do. Apparently you are not able to read or interpret
specs for audio gear.

They certainly don't. It was discussed here some months back. They will give
*nominal* levels only.


Line-level... mentioned all over their specs for nearly ALL of the
analog input declarations. Since we are not discussing digital, we need
not go there.

From Wiki for the term "line-level":

"Professional audio equipment line levels are rated in dBu, and the most
commonly used nominal level for such equipment is +4.000 dBu, which
corresponds to a sine wave of about 1.228 VRMS. The absolute reference
voltage is 0.7750 VRMS. This reference voltage corresponds to 1.000 mW of
power at 0.6000 kOhms."

Sound cards are not professional equipment.

Graham

.

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