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Automatic Soundcard Compensation with spd/if

Discuss Automatic Soundcard Compensation with spd/if in the Subwoofer Equalization | Calibration forum; Automatic Soundcard Compensation with spd/if So if I want to use the automatic soundcard compensation but my output from my soundcard is spd/if (hooked ...

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Old 04-01-08, 01:02 PM   #1 (Link)
 
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Automatic Soundcard Compensation with spd/if


So if I want to use the automatic soundcard compensation but my output from my soundcard is spd/if (hooked up to receiver), how do I do a loop back connection?

Should I connect the left preout from my receiver to the left line in? This would take into account the delay through the system, no?


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Old 04-01-08, 01:25 PM   #2 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


Quote:
So if I want to use the automatic soundcard compensation
What is the reasoning for this? REW was designed to be used with the analog line-out and line-in connections, so that you can measure and setup filters in an equalizer.

brucek


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Old 04-01-08, 01:26 PM   #3 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


So the test tone is as clean as possible?


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Old 04-01-08, 01:27 PM   #4 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


You could try it, problem is you end up compensating for whatever the response of the receiver preout is which may not match the response of the other outputs - it could have a different LF roll-off. Try looping the sub output back to the right line input and make a measurement to see how flat the sub output comes out at LF, that will show you whether or not the compensation is correct.


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Old 04-01-08, 01:35 PM   #5 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


What about this connection method?

I have an Audigy2, and it has both PCM digital output and analog output.

So if I loopback the analog output directly into the line-in and hook up the digital out to my AMP, my measurements should be valid?

Or is it dependent that it must use analog version from the sound card?


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Old 04-01-08, 02:18 PM   #6 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


Quote:
So the test tone is as clean as possible?
I admit to not having a clue as to what you are attempting to do here?

Is your goal to use REW and a PC to measure your subwoofers response and suggest filters for an equalizer?

brucek


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Old 04-01-08, 04:21 PM   #7 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


Quote:
brucek wrote: View Post
I admit to not having a clue as to what you are attempting to do here?

Is your goal to use REW and a PC to measure your subwoofers response and suggest filters for an equalizer?

brucek

Yes, just that my PC sound card has digital output and my receiver can use that..


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Old 04-01-08, 04:28 PM   #8 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


Quote:
my PC sound card has digital output and my receiver can use that
Does your soundcard not have an analog line-out and line-in?

bruce


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Old 04-01-08, 04:55 PM   #9 (Link)
 
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Re: Automatic Soundcard Compensation with spd/if


Quote:
brucek wrote: View Post
Does your soundcard not have an analog line-out and line-in?

bruce
Yeah it does, I'll guess I'll just use that and send the analog out to the amp.


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