Recent content by Sliderule

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...

I just ran some tests with the Motu 2 1. swapping calibrated mic's. 2. Swapping XLR cables 3. Swapping speakers. The problem is basically in the Motu M2 mic input. Not very happy camper.