tag:blogger.com,1999:blog-8689487740107692135.post2617463322136145609..comments2024-01-15T04:39:32.375-08:00Comments on Red Spade Audio: Basic measurement setupPaul Spencerhttp://www.blogger.com/profile/07514836858344391753noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-8689487740107692135.post-9401105742189078402010-12-11T06:51:36.431-08:002010-12-11T06:51:36.431-08:00As you say, phantom power is required for the Behr...As you say, phantom power is required for the Behringer mic and it is provided by the mixer shown in the photo.Paul Spencerhttps://www.blogger.com/profile/07514836858344391753noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-4787783213227500502010-12-11T04:58:19.906-08:002010-12-11T04:58:19.906-08:00I am certainly no expert but I am pretty sure that...I am certainly no expert but I am pretty sure that the Behringer mics need "phantom power" whatever that is. PC and Mac inputs almost certainly don't have "Phantom Power" so therefore you need a semi-pro mixer or similar that has this feature.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-76441312374890295912010-08-28T21:18:10.000-07:002010-08-28T21:18:10.000-07:00Without the mixer which provides gain control, you...Without the mixer which provides gain control, you probably won't get any result. With the mixer, you plug in an XLR mic cable, then you can see at the top "main output" (just under "502") where you have two TRS jacks. I use Jack > RCA adaptors then connect that to PC via a cable with RCA on one end, mini jack on the other. This goes into mic input on the sound card. You of course also need an output from the sound card into the sound system so the program can send out a signal to measure.Paul Spencerhttps://www.blogger.com/profile/07514836858344391753noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-24761691538850890682010-08-28T06:32:46.868-07:002010-08-28T06:32:46.868-07:00well i may as well buy the microphone first and se...well i may as well buy the microphone first and see if i get a good result without the mixer, and if not then buy the mixer.<br /><br />it has a 3-pin XLR, would it work if i bought a 3-pin XLR to 2.5mm stereo adaptor for connecting to a soundcard?Simonnoreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-43501809291246055262010-08-26T05:09:05.515-07:002010-08-26T05:09:05.515-07:00Yes. If the gain is too high, you get clipping of ...Yes. If the gain is too high, you get clipping of the signal and the measurement isn't accurate. The gain needs to be in an acceptable range to get an accurate measurement.Paul Spencerhttps://www.blogger.com/profile/07514836858344391753noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-49829676480402470192010-08-25T20:34:25.518-07:002010-08-25T20:34:25.518-07:00Can you please elaborate on the gain issue? Do you...Can you please elaborate on the gain issue? Do you mean if i turn up the microphone in volume too high on the pc, then the frequency response graph will be clipped, but too low and it will be overcome with noise?<br /><br />how does the mic preamp help with that?Simonnoreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-57191313385003003232010-08-22T04:53:57.843-07:002010-08-22T04:53:57.843-07:00Hi Simon,
Good question - I will update the blog...Hi Simon, <br /><br />Good question - I will update the blog when I get the chance. The problem is one of gain and being able to ensure that it's in the right range for measurement. Too much gain and the signal gets clipped. Not enough and you won't get an accurate measurement or in fact any measurement. You not only need the gain, but also gain adjustment so that you are above the noise floor without clipping the signal fed to the sound card.Paul Spencerhttps://www.blogger.com/profile/07514836858344391753noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-76464434670605289712010-08-22T01:08:06.741-07:002010-08-22T01:08:06.741-07:00Hi Paul,
I am looking to get a setup to measure m...Hi Paul,<br /><br />I am looking to get a setup to measure my speakers and my room.<br /><br />Why do we need the Behringer XENYX 502 mixer? Why can't we just connect a microphone to the line in port of a soundcard and use software to generate a frequency response chart? wouldnt that enable us to view the spikes and dips and fix that via placement, room treatment or equalisation?Unknownhttps://www.blogger.com/profile/04291303087944128466noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-835060608840231142010-08-16T02:18:56.363-07:002010-08-16T02:18:56.363-07:00In that case it's the same as my setup. You ju...In that case it's the same as my setup. You just need to get from a stereo mini jack to two pro style jacks. There are many ways to do it, including soldering your own cable, buying cable with the desired connectors already on each end, or using adaptors. I prefer adaptors as they are handy to have anyway. You should not have a problem with gain, although I did find that out of the two available inputs (mic and line in), only one of them was suitable. If a pro mixer doesn't give you enough gain, I don't know what will. I've found that when using the right input, I can easily get the level high enough to cause clipping of the signal. Fortunately REW gives you a warning when this happens.Paul Spencerhttps://www.blogger.com/profile/07514836858344391753noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-15048328431280627352010-08-16T01:08:19.580-07:002010-08-16T01:08:19.580-07:00Hi Paul, The input on a Mac is mini jack that also...Hi Paul, The input on a Mac is mini jack that also work as Toslink optical. No soundcard as such in a Mac...any suggestions? Hopefully the XENYX 502 will bring up the ECM8000 to a level that the Mac can work with?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-75811887749726915252010-08-15T06:32:18.791-07:002010-08-15T06:32:18.791-07:00Good question. What inputs do you have on your sou...Good question. What inputs do you have on your sound card? PC sound cards typically have mini jacks so it's a matter of either getting cables with the right connectors, or using adaptors. If you don't have any typical audio inputs then you might need to soure a special adaptor for Macs. Also keep in mind that you can have gain issues depending on whether you use mic or line inputs.Paul Spencerhttps://www.blogger.com/profile/07514836858344391753noreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-46768302227250584622010-08-15T05:54:48.675-07:002010-08-15T05:54:48.675-07:00Hi Paul,
A basic question; How does the 502 con...Hi Paul, <br /><br />A basic question; How does the 502 connect to the computer as I see no USB connection? I would like to run it into a MacBook if possible?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8689487740107692135.post-49881219720854777522010-08-09T10:09:35.839-07:002010-08-09T10:09:35.839-07:00Thanks for the link to the Calibrated Behringer EC...Thanks for the link to the Calibrated Behringer ECM8000 microphones.<br />CheersdiyAudioProjects.comhttps://www.blogger.com/profile/02982731963250878024noreply@blogger.com