The WinMLS guy says that his single-channel system has a procedure where he purports to "calibrate" the computer's various delays. Unlike the single-channel case, the measurement system delays don't matter. The stimulus and response are correlated and it's a simple matter of inserting the system-under-test's delay on the stimulus signal before computing the transfer function. Two-channel measurement systems, like Smaart, record the stimulus and response simultaneously. The measurement system delays are subtracted out and the impulse response gives the SUT delay, which is also subtracted out, and finally the transfer function is calculated. If one knows the exact time between when the signal generation starts, and the delays through the DAC and the ADC on the receive end, then one doesn't need to record the stimulus and the system-under-test response, just the SUT response to the stimulus. The measurement input is basically a correlation receiver and is "looking" for this known test pattern. That is, his program generates the MLS stimulus and records only the system response.įor those that don't know, MLS works by sending a known pseudorandom noise sequence to the system under test. The guy who wrote WinMLS seems to think that he can do single-channel measurements on a PC running Windows. Hey, Chris, before I download the app, lemme ask you a question. I'm the developer, and I'd like to clear a few things up for you. He maintains a log of his developmentĬhris Liscio wrote on Fri, 19 November 2004 19:52 SuperMegaUltraGroovy is run by Chris Liscio, an independent softwareĭeveloper that targets Mac OS X. Information, screenshots, and user stories! Oh, and download a trial copy Screenshots of antiquated DOS applications! That may be used in printed product collateral - no more scaled-up FuzzMeasure also produces high-quality graphs Also, FuzzMeasure canĮxport all its measurement data to be used by scientific computation Perform with any other software package on the Mac. Graphs for speakers, rooms, filters, and much more!įor $49.99, FuzzMeasure opens the doors to measurements that you cannot Have, you're able to capture your own industry-standard frequency response MLS stands for Maximum Length Sequence, and it's a great way to measure theĭynamics and impedance of loudspeakers. Measurement software package for Mac OS X! SuperMegaUltraGroovy releases FuzzMeasure 1.0 - The first-ever MLS In any case I thought someone might find it interesting in the Mac brotherhood. From what I can see it does not do custom windows or measure phase. I went to the site and looked around a little. I copied this from the DIYspeakers listserv.
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