Soundblaster Live! 24-bit USB External Setup - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #1 of 115 Old 06-04-06, 03:18 PM
bobgenie
Inactive
 
Posts: n/a
REW (SB Live! 24-bit external)

Hi,

I have a Creative 24 bit external soundcard but have been unable to calibrate it despite messing with all the various settings there was always some feedback. The only way I can get a normal looking curve was to use the internal card as output and the external card as input. This gave me a calibration curve similar to that for an internal card.
I then tried a sweep for the sub but it seems with limited success
I've spent all day on this and achieving very little so far. Can anyone help?

Cheers.
Sponsored Links
Advertisement
 
post #2 of 115 Old 06-04-06, 04:50 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,566
Re: REW

I guess you mean the SoundBlaster Live! 24-bit External USB card.
  • Ensure in the Creative Speaker Settings that the "Digital Output Only" box is not checked.

  • Ensure CMSS is off (green CMSS LED off - push the button on the front of the unit to turn it off if it is on).
  • Select Line In/Mic In as the Rec source in the Creative Surround mixer.
  • In the Creative surround Mixer Source panel ensure Wave is not muted, Line-In/Mic-In is muted.

  • Ensure monitoring is off (click the + by the Line In/mic In symbol in the Source panel and ensure Monitor is not checked in the Advanced Controls dialogue this pops up (or run the Creative Device Control program and ensure Enable Monitoring not checked).
  • In the Creative Device Control program set the Output Audio Quality to 48kHz, 16 bits and ensure you select 48kHz as the sample rate in REW.

  • In the Creative EAX Console make sure Audio Effects is not enabled, Equalizer is not enabled etc.
  • If a dialogue pops up that says to hear audio you must enable monitoring, click Cancel on the dialog.
  • By default the Wizard sets the output level to 0.5 while setting measurement level, for the SB Live! it is typically better to set output level to 1.000, otherwise can struggle to get sufficient input level - if you find this, use the Master Control in the Creative Surround Mixer to increase the volume to 100% at the point in Setting Measurement Level where the Wizard pops up a message saying that it is about to generate a pink noise signal at -20dB
Hope that helps
JohnM is offline  
post #3 of 115 Old 06-04-06, 07:29 PM
bobgenie
Inactive
 
Posts: n/a
Re: REW

Many thanks John, very helpful. The 16 bits in device control made the difference as all others were as they should have been. Regarding the increase in volume to 100% in soundcard control, does this then stay at 100% or revert back to 50% after the measurement?

Anyhow, I got it working and the curve was exactly as expected.

I then did an automatic sweep of the sub and that was not I set the target level at 77.6 but achieved a peak of something like 36 db. The graph was just a mess with both peak and dips off the graph and only reaching a third along the way. Is my room really that bad or am I (again) doing something wrong?
 
post #4 of 115 Old 06-04-06, 10:54 PM
Elite Shackster
 
Sonnie's Avatar
 
Join Date: Apr 2006
Location: L.A. (Lower Alabama)
Posts: 22,577
My System
Re: REW

Did you have your axis settings set properly? Check out post #2 and #3 in this thread.
Sonnie is offline  
post #5 of 115 Old 06-05-06, 12:57 AM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,566
Re: REW

Regarding the output volume, when you exit REW it will be restored to the level it was at when REW started up. It will stay at 100% while REW is running (unless you alter it elsewhere).

The default for the sweep is to cover the range from 20Hz to 200Hz, you can change this in the boxes below the Automatic Measurement button.

When setting the target level make sure the speaker type on the tab you are using corresponds to the speaker you are measuring, i.e. it should be set to Subwoofer when measuring the sub.

Did you hear the sweep when doing the test? It is a tone that starts out very low and gradually rises in frequency over the few seconds of the measurement, if you didn't hear it then start looking at the connections to your sub. If you hear the tone OK and you could see your SPL meter needle reacting then check the connections from the SPL meter and that the channel selected in the SPL Meter box (below the red Record button) corresponds to the input you are using. If the meter needle did not react check that it is set to the correct range (usually 80dB).
JohnM is offline  
post #6 of 115 Old 06-05-06, 02:45 PM
bobgenie
Inactive
 
Posts: n/a
Re: REW

Changing the axis settings made a difference, now I can see the graph - it's still a bit but we're getting there I made some adjustments to the BFD and ran the sweep again which made some changes but I will connect the midi cable later this week and hope to get things moving.

I downloaded the cal files for the newer digital RS meter but couldn't see how to input them into the REW. My head still sore from all the other stuff! Do I just enter the figures in to the REW somewhere?

Thanks for all the help, and no doubt I'll be asking again soon
post #7 of 115 Old 06-05-06, 02:59 PM
Elite Shackster
brucek
 
Join Date: Apr 2006
Posts: 7,514
Re: REW

Quote:
Do I just enter the figures in to the REW somewhere?
Simply copy the calibration data into notepad and save the file as rs.cal in any directory you wish.

Then start the REW program and under the pull-down METER, select LOAD METER/MICROPHONE CALIBRATION FILE.

You then enter the location of your XXX.cal file and that's it. The next time you start REW it will tell you that the cal file is loaded.

brucek
brucek is offline  
post #8 of 115 Old 06-05-06, 03:32 PM
Elite Shackster
 
Sonnie's Avatar
 
Join Date: Apr 2006
Location: L.A. (Lower Alabama)
Posts: 22,577
My System
Re: REW

You should be able to save the *.cal file just like it is from the Downloads page to a folder on your hard drive. Probably name a folder "REW" under your "My Documents" folder and save all your REW files there... such a *.mdat files, *.req files and your *.cal file. This keeps all your REW related files under one folder.

To load it... in that same thread (post #6) I referenced earlier we have diagram clip of loading the *.cal file... as brucek explains... it's a one step loading process.
Sonnie is offline  
post #9 of 115 Old 06-05-06, 04:21 PM
bobgenie
Inactive
 
Posts: n/a
Re: REW

Brilliant - thanks!
post #10 of 115 Old 06-06-06, 06:08 AM
Elite Shackster
Chrisbee
 
Join Date: Apr 2006
Posts: 1,018
Re: REW

Just like to say thanks John for showing the Soundblaster Live! screenshot.

Until I saw your post I'd just run the device as Plug and Play and was getting nothing except music replay.

Now I've run the software CD and have lots more toys to play with.

The packaging said Plug and Play and (like a fool) I trusted the packaging.

The problem is if you connect a device and then run the CD you sometimes get multiple drivers and a non-functioning toy.
It happened with both my Philips Toucam Pro webcams 1 & 2.

One day all IT will be as easy to use as toasters. Now if I could only fathom out how to work my toaster.

Thanks (yet) again.
Chris
Chrisbee is offline  
Reply

Bookmarks

Tags
24bit , external , live , setup , soundblaster , usb

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome