Anyone out there creating impulse responses?

Question

Those of you that use sine sweeps to create your impulse responses, when you deconvolve them do they end up being the same length as your sweep file or does space designer create the proper length reverb tail?
When I attempt to create my impulse responses space designer does not create a reverb tail. It just seems to remove the sound of the sweep form the wet file.
Other convolution reverb programs that I have used create a reverb tail automatically and I believe sound designer should do this as well.
If anyone else is having this problem or has a fix for this issue please let me know. If not then if anyone out there is successfully capturing impulse responses using a sine sweep please post detailed step-by-step instructions on how you are able to do it.
At this point I am at wits end. I have contacted apple care only to find out that they don’t support space designer, so they were no help. You guys are my only hope…
Please Help
iMac   Mac OS X (10.4.7)  

Answer 1

The process is simple, but has many steps and they must be takin in the proper order:
Play the sweep tone into the space or reverb device while recording the output of the space or reverb device. If you use a reverb device, be sure to set the mix to 100% effect.
Be certain that the space or device you are sampling has fully decayed before you stop the recording. If you were sampling a 4 second plate reverb, do not stop the recording for at least 8 to 12 seconds after the sweep tone feeding the plate has ended.
Edit the resulting recording to eliminate 'dead space' before the sweep begins, and remove any excess space at the end of the file. Be careful not to truncate the decay portion after the end of the sweep.
Place the original sweep file and your edited recording of the effected sweep somewhere easy to find, I use a new folder and save them there.
In "Space Designer" press the "Deconvolution" button in the upper right corner. Load the effected sweep recording, then the original sweep signal and then save the resulting IR in a new folder.
Load the resulting IR file using the "IR Sample" menu and save the preset.
I've created hundreds of impulse files using sweep tones and it has always yielded proper reverb tail lengths for the space or reverb I was sweeping. In other words, if the sweep was 12 seconds long and the space I was sweeping has a 3 second RT60, the resulting impulse would be 3 seconds. On some files Space designer will create an impulse file which is much much too long. In these cases I remove the unnecessary minute or so at the end of the file and resave it.