You might try the audio EQ filter and select the drop down choice of "60 Hz hum notch using four stacked". Run the bandwidth out to about 1.0 and then slide the frequency bar up the scale until the hum goes away. When you kill the hum go back to the bandwidth slider and reduce it until the sound reappears. Readjust the frequency slider until the hum goes away again. Repeat this process until you have the bandwidth as low as you can get it and still kill the hum. Quite likely the hum will be in an area around multiples of 60. Shoot for getting the bandwidth down to 0.3. There are four "notches" available in this filter and it's possible you might find another frequency above the first one that has an effect. Essentially you are manually doing what the Izotope RX program does to remove hum. If you kill the hum try changing the notch to "high bandwith". You may be able to eliminate some noise by using just a little bit of pf this filter.

Hey Grazie, does anything show up on Izotope? I can't download his dropbox link. I'm thinking a wireless next to a speaker has got to be a easy enough to filter out.

Anything in iZo? Well, yeah . . . but I need to get my hands on the WAV file, otherwise I need to patch-out from my monitors INTO my Presonus Audiobox.

G

Gotcha.. Thanks !

Using TrackEQ, start from '60Hz hum notch...', move frequency to around 14,500-15,000 minimize the uncomfortable 'sharp' high-tone.
Combined also with GraphicEQ, turn down on 10k Hz helps reducing the hiss.

I hope this combination is not too 'destructive' ?

Set

OK.

G

Be thrilled that you can actually hear it !

geoff

I 'see' a HF spike @ around 15.6kHz which can easily be attenuated with a notch filter. But that's the least of your problems. The sound is very muddy.. pretty awful sounding. A high-pass filter may help a little.

I can't hear it either (66 year old ears, abused in the engine rooms of Great Lakes freighters in my 20s).

In similar conditions, I clamp a little Tascam audio recorder to the speaker stand, and have not yet had hum or other noise.

Wireless is just so unpredictable - I was visiting a friend in Arkansas last week, we went to a good sized church, and they were having fits with their wireless. It sounded to me like someone in the parking lot was stepping on one of the frequencies, but it wasn't my place to say. The pastor finally took one of the choir mics and turned off his lavalier.

I added <?dl=1> to the link. That allowed me to download the file. I loaded it into Adobe Audition 3 so I could look at it in Spectral View. Found a honkin' loud tone at 15.7 kHz. Went to Vegas Pro, opened the wave file, and applied a track EQ filter to left and right channels. Chose band pass. Set the upper freq. to 16 kHz. Set the Lower freq. to 15 kHz. Set the volume to maximum attenuation. And set the band width to narrowest. Poof. Offending tone gone. No comment on the rest of the sound. You do what you got to do with the equipment you have, right. Isn't 15.7?? about right for the horizontal sweep frequency interference we used to get from CRT televisions and monitors??? I think so. Could that have anything to do with it?

The horizontal frequency is 15,734.264. Hz. I had that number drilled into my head while taking electronics in college many years ago which is probably why I remember it to this day :)

Mike

Ah, yes, "SPIKE" is more suitable word for this issue...

http://dl.dropboxusercontent.com/u/29342552/VegasPosts/Spike%20removed.mp3 (add '?dl=1' in the end of link if you want to download it)

At least it is not as bad as before, where that high frequency tone is really 'stabbing' the ear...
Filtering at 15,734 Hz with TrackEQ, and add gain with GraphicEQ to decrease 'muddy' sound.
Learn something more for EQ, TrackEQ vs GraphicEQ! Thanks!

*Not a perfect solution I guess?

Set

My 60+ year-old ears can't hear this either (only one summer on the Great Lakes Ore Freighter -- Inland Steel - as a deck hand). However, I can sure see it in iZotope.

iZotope RX3 shows the spike at 15,699 Hz. I zoomed in and selected from 15,696 to 15,704 Hz and then use Spectral Repair to remove it. Gone. A narrow EQ filter should work as well. However, I think the center frequency is a little lower than others have reported, not that it will matter much.