Recent content by Sliderule

I have attached 2 screeenshots of the RT60 display for the left and right speakers. The speakers are full range electrostats. SS133 is the left speaker and 132 is the right speaker. The left speaker has a lateral null that shows at the 250Hz on the ED. The EDT looks fine as it pretty well...

FWIW- I already have heard from Cross spectrum and my mic is being shipped to them tomorrow. Now if I can get my B&K 2230 repaired.

Yes I did try the Cross spectrum page. I had to change to Edge browser to input date as Duck, duck blocked filling out the form on Google. Thx for the info.

I have an Behringer ECM8000 and a Dayton ENN-6 microphone that I would like to have calibrated. The ECM8000 was originally calibrated by Cross Spectrum in 2012. I have called Cross Spectrum (had to leave a message) and tried to send an email froma their web page which no longer functions. I...

Hello Deer Creek - the topic address is corupted. The issue I was having (measurement high frequency roll-off) is corrected by using acoustic timing.

I did hear back from Mitch and he suggested creating a wav file with markers. I will try that early next week.

I will test it this weekend. Thx

I am using Acourate software to create the filters. The target curves I believe can be edited in text format but I haven't seen any detailed instructions on that and the additional subfilters on tweaking. I have attached a screenshot of one of my filters. The filters are very difficult to...

I did a complete reply but for some reason it did not get posted. I am using Sony ES5400 Cd player, custom built phono preamp and Benchmark Preamp feeding a Lynx Hilo 2 DAC/ADC which is connected to a laptop unning an Acourate concolver to modify the signal which goes to the power amps thru...

I am currently using an Acourate convolver and DSP filters with a laptop. The signal processing delay is abour 2.7 seconds I am currently using acoustic timing with 2.7ms delay (3ft.) for swept frequency measurements. I have looked at loopback but I don't understand how they would work...

I agree about the loopback response being flat. Motu specs it as +0dB, -.01dB 20Hz to 20KHz. The phase response is what is causing the high frequency rolloff in my speaker measurements. FWIW I tested everything including multiple computers, Motu's, cables, ASIO vrs Java, - you name it and I...

Yes, I am using the Behringer ECM800 which calibrated by Cross-Spectrum and loaded into REW. I have been using REW for over 12 years and made many hundreds of measurement and never had an issue until I got the Motu M2.

Thanx for your response. I have spent the last 8 months trying to find out why my very expensive speakers had a huge roll-off above 10KHz. I have tested everything with multiples - computers, audio cards, cables, you name it. The frequency response dies after 10KHz. No matter what test...

I have been having some high frequency measurement issues (excessive rolloff). I have been using a Motu 2 for audio interface. I have attached a couple off screenshots. Screenshot 71 is my old mobile Pre audio card. The phase is linear to nearly 22KHz. Screenshot 69 is my Motu 2. The...

I would like to use REW to measure the linearity of the micrphone input of my Motu M2 USB audio interface. I did a bench setup using a HP 34401A multimeter to measure frequency and amplitude. Tek 465B scope and HP 3312A function generator. I am using an xlr to bnc adaptor to input. I...