Recent content by bobkatz

Hi, John. Thank you. I did have loopback set as timing reference in measure. Turns out the problem was in the Prism interface. I downgraded the firmware and the loopback problem was not fixed. Then on a whim I upgraded the firmware back to current, and the loopback started working! I think the...

First of all, congratulations to John for constantly maturing REW. Continues to blow my mind! I've been using REW for Windows for years for both capture and analysis. I've been using REW on MacOS for analysis of existing .mdat files, but up to now, I haven't used MacOS for capture. But in March...

Thanks for that advice!

Hi, John. I'm trying to show the DIFFERENCE in amplitude between using some traps and no traps in my room. I've tried all kinds of trace arithmetic and different displays (including V/V) to no avail. What I'd like to see is, for example, if with the trap at 100 Hz the amplitude is 78 dB SPL but...

Thanks. That's the key to getting 48k!

Hi, guys, hi, John. I'm taking some measurements with the Mini DSP Ears and having a little trouble getting the system to function at 48 kHz sampling, in Win 10. The Mini DSP requires Java. My Lynx interface is set to internal clock. Every time I try to set REW sample rate to 48k, my interface...

Thanks. I was just worried that because the USB-based HDMI audio output is on a different clock than the Prism interface, whether the Drift correction might make things worse, or better, in a random sort of way. I'm only concerned about the precision of the timing reference for setting speaker...

Hi, John! Long time no talk. Because REW just works so well and you keep on keeping on! I will be aligning my new bedroom 7.1 system soon. I'll be needing to use a multi-output or "Aggregate" device in MacOS. There is an option for "drift compensation" and I don't know if I need it for this...

I've often got some complicated input and loopback settings. I wonder if it would be nice to add some presets to the input and loopback settings? (user settable). Do you think that would be useful?

Dear DanDan: Ethan and I are at big odds over the audibility of these phenomena. I am convinced that the EVP isolators work and work well. I've done the sighted listening tests with my 300 pound Dynaudios. There are some remarkable improvements. Remember that sound travels faster through a...

Dear AJ: 99% measurements and 1% sighted observation.

Dear Dan Dan: it's quite difficult if not impossible to prove audibility of these kinds of vibrations by a double blind listening test. For the moment i'm sticking to measurements and informal listening tests. My readers can take or leave my subjective opinions but will have a hard time arguing...

Dear 3: Thanks for the info on the accelerometers. The Digiducer is supposed to be very light and what I like is my Spectraplus software is already equipped to read the calibration data from the USB. Plus it's good up to around 1 kHz, which may be helpful, maybe not. Thanks for the info. I was...

Dear John: I intend to do as scientific a study as possible of the effects of vibration isolators (e.g. the EVP Isolators from AV Room Service: http://avroomservice.com/evp-2/ I have Spectraplus, which is an analyzer that has integrated vibration measurements, calibrated in units relative to 1...