See this as well: http://rmaa.elektrokrishna.com/
Quote from: saratoga on 09 February, 2013, 07:06:01 PMSee this as well: http://rmaa.elektrokrishna.com/Regarding that site. How do you loopback a Clip+? It only have one line out.
The standard recommendation is a loopback test using RightMark Audio Analyzer.This page offers some warnings, best practices, and criticisms.
Quote from: djchristian on 09 February, 2013, 07:58:33 PMQuote from: saratoga on 09 February, 2013, 07:06:01 PMSee this as well: http://rmaa.elektrokrishna.com/Regarding that site. How do you loopback a Clip+? It only have one line out.The output of the clip is wired into the line in of an A/D.
Note that the complainain's software of choice Spectra Lab shares this situation.
All of the versions of RMAA that I've used had a setup option for changing the test tone frequencies for the SMPTE test to be what I wanted. If memory serves, the analysis of the frequencies I tried was correct and reasonble.
( • LOW FREQUENCY DISTORTION – It’s also useful to measure THD+N at very low frequencies such as 5 to 10 hz to expose thermal modulation effects, power supply issues, and more.It seems like this situation could be addressed by using RMAA's setup feature but I've never tried it.
(11) •RESIDUAL ANALYSIS – Analyzing the residual distortion products can be very revealingRMAA presents a spectral analysis with just about every test and you can manipulate the vertical and horizontal scales as you will. It doesn't get a lot better than this with most programs.
(15) • HARDWARE LIMITATIONS – Nearly all PC sound hardware has some severe limitations that restrict RMAA and any other software. For example bridged and certain other amplifiers cannot have any of their output terminals grounded or connected together.Another problem that is inherent with PC audio interfaces and afflicts any software that uses them to gather data including the author's fave Spectra Lab.
So, the freeware Audio Rightmark software, which I'd put at being capable of 90+ percent of what needs to be done, and maybe 80% of what could be done as one heck of a deal. The Rightmark software will also build a postable web page, which is at least a half hour's work if you are using Spectra.
My first thought was something like having the outputs of the soundcard connected to the inputs, play one song and record it on another track (I'm using Nuendo).That's the part of the process where all things worked out as planned, except......I was thinking that by doing this, if I phase reversed one of the stereo tracks, I would end up only with the differences between the two (or nothing, on a perfect scenario).I had to compensate for the delay and any volume difference, but on the best 'phase cancellation' spot, I still hear (mostly) the very high frequencies.