How do I create a short length IR using a Sine-Sweep? Every time I create an IR using the Sine-Sweep, it creates an IR with the length of the Sine-Sweep, which is about 13 seconds. What I want to accomplish is the creation of an IR that is shorter than 13 seconds. Editing the created IR using trim at the start and the end of the file in the Sample Editor doesn't work. It destroys the quality of the IR (reverb), and it adds a big side effect noise. And of course a 13 seconds length IR is a juice eater in the CPU. I know I can shorten the IR in the Space Designer parameter, but this is only readable by SD as a saved preset. What I want is the creation of the actual IR ( the audio file) to be short, let's say 3 or less than 3 seconds instead of 12 or 13. It would be nice if you could save the presets of SD IR as an IR-audio file on your hard drive By the way, I'm sampling my unit, the KSP8, not an acoustic place (yet) So, how do I create a short length IR (audio file) using a Sine-Sweep? Thanks in Advance -- LAMP 6.4.1/WBPro 2.2.1/Dual G4 1.25/Two Motu 1296 & 2408mkII/ADATs XT20/MTP/AV non-USB/ KSP8 Bus Processor with 8 Analog I/0 + RSP8 - Mac0s 9.2.2 & X./ Adaptec dual channel 31139 SCSI Two Monitors Video Card. Willian Aleman. Latino Mastering Studio, Inc. Yonkers, N.Y. USA

On 3/31/04, Willian Aleman put forth: >How do I create a short length IR using a Sine-Sweep? >Every time I create an IR using the Sine-Sweep, it creates an IR with >the length of the Sine-Sweep, which is about 13 seconds. What I want >to accomplish is the creation of an IR that is shorter than 13 >seconds. > >Editing the created IR using trim at the start and the end of the >file in the Sample Editor doesn't work. It destroys the quality of >the IR (reverb), and it adds a big side effect noise. After you deconvolve your IR, you will end up with with space at the beginning and end of the file that is nearly silent. The space at the beginning will delay the reverb. So need need to trim the file, and add short fades to the ends. >And of course a 13 seconds length IR is a juice eater in the CPU. Right. On my system (1GHz 1G RAM G4) there are IR's I've recorded using SD that won't load into SD. >I know I can shorten the IR in the Space Designer parameter, but this >is only readable by SD as a saved preset. What I want is the creation >of the actual IR ( the audio file) to be short, let's say 3 or less >than 3 seconds instead of 12 or 13. Obviously, it helps to sample a short reverb in the first place. >It would be nice if you could save the presets of SD IR as an >IR-audio file on your hard drive Can you record an IR of SD?? I never tried. >By the way, I'm sampling my unit, the KSP8, not an acoustic place (yet) >So, how do I create a short length IR (audio file) using a Sine-Sweep? You could also try using a noise burst instead of a sine sweep. Keep in mind that sampling modulated reverbs won't "work" -- especially using a sine sweep.