Sound card will not calibrate - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 22 Old 03-24-15, 09:01 AM Thread Starter
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Sound card will not calibrate

Good afternoon,
Having downloaded the latest version last night I cannot get the sound card to calibrate. I've read the help file and checked threads and made the following adjustments:
sample rate to 44hz
increased the buffer to 128
made sure the levels are within 4db
but as soon as I click next there's an increase in the input volume followed by a big drop off (out) at the high end and I keep getting this message:

The sound card measurement varies by 59db between 20hz and 20kHz, this is much higher than in should be, the measurement may not be valid........

The measurement graph looks an absolute mess

Help please, what am I missing (go easy I'm a nooobie at this)

It's an Acer laptop with a realtek sound card, 3.5mm jack from headphones to speaker jacks.

Thank you
G.
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post #2 of 22 Old 03-24-15, 09:48 AM
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Re: Sound card will not calibrate

Quote:
Giraffe1300 wrote: View Post
It's an Acer laptop with a realtek sound card, 3.5mm jack from headphones to speaker jacks.
First, welcome to the Forum!

Not sure what you’re doing there, headphone output to speaker jacks? Those are both outputs. The loopback is supposed to be between the output and line input.

Regards,
Wayne



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post #3 of 22 Old 03-24-15, 11:03 AM Thread Starter
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Re: Sound card will not calibrate

Thank you and DOH! great first post

Headphone to mic input.

G
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post #4 of 22 Old 03-24-15, 11:18 AM
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Re: Sound card will not calibrate

Nope, line input not mic input. Hopefully your sound card can switch the input from mic to line.

Regards,
Wayne



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post #5 of 22 Old 03-24-15, 01:29 PM Thread Starter
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Sound card will not calibrate

Wayne, tried that and variations on drivers but same result :-(. What else can I try? G.

Last edited by Giraffe1300; 03-24-15 at 01:38 PM.
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post #6 of 22 Old 03-24-15, 01:39 PM
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Re: Sound card will not calibrate

What kind of cable are you using? Specifically, what connectors on each end?

Regards,
Wayne



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post #7 of 22 Old 03-24-15, 01:46 PM Thread Starter
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Sound card will not calibrate

QED 2m 3.5mm to 3.5mm stereo cable. G
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post #8 of 22 Old 03-24-15, 04:40 PM
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Re: Sound card will not calibrate

Sounds like the right cable, and if you got the same results when you switched from headphone out to speaker jacks to the line in, then it’s not a cabling issue. Try posting a graph of your results, that can be telling.

Regards,
Wayne



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post #9 of 22 Old 03-25-15, 02:06 AM Thread Starter
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Sound card will not calibrate

Yep, same result unfortunately. This is what it looks like: sweep at -20db, flatness +11.7Db to -42.9db.

Thanks for your help Wayne.

G.

Last edited by Giraffe1300; 03-25-15 at 02:49 AM.
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post #10 of 22 Old 03-25-15, 06:01 PM
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Re: Sound card will not calibrate

That’s a graph of an in-room measurement. Did you have the mic plugged in during the calibration? What mic are you using anyway?

Regards,
Wayne



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