what is DNR of audio input?

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jbeale
Posts: 2
Joined: Wed Aug 23, 2017 7:28 am

what is DNR of audio input?

Post by jbeale » Wed Aug 23, 2017 7:32 am

I am curious what is the actual measured dynamic range of the analog inputs on this (surprisingly cheap) audio card. I understand there is some theoretical number, but what is the actual number you measure, has anyone done that?

IrwinAllen13
Posts: 13
Joined: Sun Jul 30, 2017 5:05 am

Re: what is DNR of audio input?

Post by IrwinAllen13 » Fri Aug 25, 2017 4:11 am

Are you talking about the audio bandwidth availability? (i.e. 20 Hz to 24 KHz)

jbeale
Posts: 2
Joined: Wed Aug 23, 2017 7:28 am

Re: what is DNR of audio input?

Post by jbeale » Wed Sep 06, 2017 12:09 am

I am talking about dynamic range https://en.wikipedia.org/wiki/Dynamic_range of the input
simply, it is how small the noise level is compared with the largest signal (which doesn't distort or clip)

A very good card might have a DNR of 80 dB or more, a lower-quality card might have 60 dB or less.
The theoretical limit for a 16-bit input is 96 dB but this is almost never achieved in practice- especially with less expensive gear.
24-bit inputs allow (in theory) more, but NO audio hardware that I'm aware of, has ever reached the 24-bit limit of 144 dB.

flatmax
Posts: 609
Joined: Sat Jul 23, 2016 11:39 pm

Re: what is DNR of audio input?

Post by flatmax » Wed Sep 06, 2017 8:09 am

Hi there,

I am going to post some noise floor measurements when I get time to do so.

Matt
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