Intermodulation with Wireless Microphones - With IMD Demonstration!

[@slowpoke96Z28]

This explanation of harmonics and intermodulation is way better than what sennheiser puts in the user's manual.

[@GreatBoneStructure]

I record with wireless mics for a living. Great explanation. There is an app called "Frequency Finder" that you can put on your phone that helps you find clean frequencies. Highly recommended.

[@MrSesmith11]

What happens when you go to 36 wireless?

[@leskanekuni6310]

Drew, I have really enjoyed your videos, very informative. But you should really use a clip-on lavalier microphone for sound. Using the camera mic with all the resultant room sound gives the video a cheap feel.

[@DrewBrashler]

Thanks so much for the feedback about this Les, it is great constructive criticism! I actually use the microphone you see in the video for my voice. After seeing your comment I spent some time and found that the microphone stand dropped the mic about 6 inches which made a really big difference. Also, you kicked me into gear to get a bit of acoustic treatment in the room. Just putting up a blanket in the room helped tremendously with the reverberance of the room. Just FYI, I have two more videos already recorded and ready to go, but on the 3rd video, audio will be fixed.

[@leskanekuni6310]

Yeah, since your videos are about sound, it really wouldn't do for the video itself to have subpar sound. Treating the room is good, getting the mic closer is good. One reason I recommend lavaliers (which are normally used for the kind of videos you do) is that they move with you. If you turn away from a stationary mic, your voice drops out. With a clip-on the mic is always on you. P.S. I am interested in the presets you have for sale on your website, but I would like to see some before/after streaming audio comparing the dry signal to the wet signal. Keep up the good work!

[@jeremyleff]

Fantastic as always Drew. I recently built an 8-wireless system for my mobile rig (based on the distribution system you posted about a couple of years ago) and have definitely run into issues when taking it into bigger cities, so this should be a big help.

[@DrewBrashler]

Thanks for the comment Jeremy! Make sure to check out the RF Spectrum Analyzers post that I did as there are a few tools that will really help you! Both of which can work with Wireless Workbench 6 (next wireless post is going to be specifically about this!). Here is a link to the RF Spectrum Analyzer post if you haven't seen it already: dbbaudio.com/2016/inexpensive-rf-spectrum-analyzers/

[@thomasphillips885]

We actually had problem with a 4-mic setup where one channel was crossing into another channel. I didn't know it was because of IMD, but I always suspected it was some frequency thing, so I changed the channel of a mic. The manufacturer's manual did not, however, mention frequencies that work together (from memory).

[@DrewBrashler]

Gotta love it when they don't do their homework before releasing a product! Which microphones were they? Thanks!

[@thomasphillips885]

+Drew Brashler local-ish brand called Digitech www.jaycar.com.au/dual-channel-uhf-autoscan-diversity-wireless-microphone/p/AM4120 Band A: 520.125MHz-603.25MHz Band B: 607.125MHz-690.25MHz

[@robwagstaffcontent]

Thanks Drew, very helpful!

[@DarkStarAZ]

I'm in the process of swapping from the 600s to the 500s and won't be able to put it all on one bank so moving forward this should help

[@NEVERSAYSLEEPSTUDIOS]

Super helpful!

[@jblbasstester6198]

Listening to this with my intermodulating JBL Charge 3 😂

[@syaz4380]

Thumbnail was from "Jeremy Taylor" yep you stole the thumbnail