Maybe a dumb question, but I'm not sure how to measure my control room response. First thing I'm confused is can I measure close response of my Tannoy AMS8 (already in soffit )? I did -6db decompensation calculated from Barefoot Wall Bounce Calculator, and here's the graph of my filter.
Now, I have to trim my HF crossover (adjustment of the relative level on the HF channel, shelving +/-3db, having break F at 2khz), but I'm not sure do I have to measure with Pink noise or something else
BTW, I have NTI MiniSPL calibrated mic and Minirator, Minilyser, and of course some software to help about.
After that measuring I will do the rest of measuring and post my results to finally finish topic about my studio building
Have you watched the videos at realtraps.com? The one on treating the control room is awesome. http://www.realtraps.com/videos.htm the first one on that page is great.
Thanks, unfortunately I have really poor net, so can't dl so big files...
Hope that will find some way to DL. In the meantime will be nice to hear (read) some comment about
Well the basic concept of the video is this: Set a mic at the mixing position (where your head goes) and play a sweep of frequencies. At the bottom of the page I linked for you there's a Sonar file with that. It goes from 40hz up to 300hz, increasing by 1hz every second. You play the audio at a loud volume while recording to a new track from the mic. Once it's done playing you look at the wave file created from the recording. You can actually see peaks and dips in the frequency response of your room. Do that before you treat the room, and after you treat the room to see how much it improved. Ethan says in the video that if you can get your room to within +/- 6db, you're in good shape.
It's a really good video. It's quite an easy technique for testing your room's response.
Or, you can take the original signal and deconvolve it with the recorded versin of that signal, turn it into the impulse response, and garner any and all information from it with the help of a friend (me)
To do this, you ill need a test signal that I provide, a test omni, and the ability to play the tone back through your speakers and record it without monitoring the recorded signal. If you're interested, let me know.
That part of measuring I understood and there's no magic
But, can I use same method for "balancing" Lf and HF channel of my active crossover? Generating the sweep from lets say 100hz to 20khz. Seems reasonable for me, but have to ask.
Or, you can take the original signal and deconvolve it with the recorded versin of that signal, turn it into the impulse response, and garner any and all information from it with the help of a friend (me)
To do this, you ill need a test signal that I provide, a test omni, and the ability to play the tone back through your speakers and record it without monitoring the recorded signal. If you're interested, let me know.
Only thing I understood is that you became my friend, what I really appreciate. Yes, I'm interested a lot, let me know about more
I'm guessing that the software you have is capable of doing what I had in mind, but if not, or if you'd ratehr have my help, that's cool with me.
I see you have a suitable mic already. If you'd like me to help you collect the raw data, all you have to do is play a test tone that I'll give you through your speakers, record it, get it back to me, and I'll do the rest.
No problem, I have a lot of software available, Lynx, RME and Digigram cards, and the pocket analyser, but not sure what you have in mind. So, will be nice to try. What type of test tone you are talking about?
I have a lot of software based and standalone type of generators available, but if test tone you are talking about is some special one, please let me know where I can DL , so I will post you the recorded one soon.
Thanks for helping
Thanks David. Sure, Sweep 20hz-20khz shouldn't be problem to me. Just let me know about duration of the sweep and maybe about usual db acoustical pressure suitable for this kind of measuring. BTW, if your method of analysing require original and recorded response file, maybe will be easier to use sweep generated by you, so when I send you response you already have the original. Also tell me does bit depth and s. rate of response matters, or not? Thanks
The sweep will be 12 seconds long. Just get it playing back at about 85 dB SPL or so. Really, you should just play it back as loud as you can while still having zero distortion. Record it at 16/44.1. Leave plenty of silence at the end after the tone has stopped playing - this helps me to estimate the SNR. Be sure to document the exact dimensions of the room and the exact positions of the speaker and microphone. This will be fun!
A little more. Place the mic at the listening positon, at the point of your (hopefully) equilateral litening triangle. Measure left and right separately.
I remember that you have slow internet. Sending wave files may be dumbersome, so you should take a look at FLAC if you don't know about it already. It's a lossless compression for audio that can reduce wave files to about 30% of their size, much better than the best general purpose data compressors like ZIP, RAR, etc.
Great David, only I don't know to understand multicolor files. I presume that the last one i reverberation, but not sure on which spectrum. Will be nice if you can add some comment about. Not just you, anyone who know a little aboutt
