tjbassoon Posted April 29, 2019 Share Posted April 29, 2019 Not a noise gate, but something specifically for feedback issues. I'm thinking something along the lines of an EQ that you can notch out problem frequencies. Or better yet, something dynamic that finds feedback frequencies and kills them. Basically a model for this: https://www.sweetwater.com/store/detail/FBQ1000--behringer-fbq1000-feedback-destroyer This would be very helpful for those of us that use microphones with the Helix Floor, or acoustic guitar players. Does that exist and I just don't know about it? Should I vote for something on Ideascale? 1 Quote Link to comment Share on other sites More sharing options...
cruisinon2 Posted April 29, 2019 Share Posted April 29, 2019 On 4/29/2019 at 8:57 AM, tjbassoon said: Not a noise gate, but something specifically for feedback issues. I'm thinking something along the lines of an EQ that you can notch out problem frequencies. Or better yet, something dynamic that finds feedback frequencies and kills them. Basically a model for this: https://www.sweetwater.com/store/detail/FBQ1000--behringer-fbq1000-feedback-destroyer This would be very helpful for those of us that use microphones with the Helix Floor, or acoustic guitar players. Does that exist and I just don't know about it? Should I vote for something on Ideascale? Well there is a parametric EQ with which you can notch filter your brains out, but there's nothing automatic that will identify problem frequencies and smite them on contact. Quote Link to comment Share on other sites More sharing options...
jester700 Posted April 29, 2019 Share Posted April 29, 2019 If you want to do this manually, the parametric will work, and there are a number of free real time analyzer apps that will help you ring out the system. It IS much easier to just put one of those Behringers (or - better IMO - an old Sabine Solo) inline with the mic. Is the feedback coming from the house or a monitor? If it's from a monitor, I'd put a de-feedbacker device on the monitor feed, leaving the signal to the house PA untouched. 1 Quote Link to comment Share on other sites More sharing options...
codamedia Posted April 30, 2019 Share Posted April 30, 2019 If the Helix is your mixer... then the parametric is your solution. Using the Q control you can isolate the exact frequency very tightly. If there is an actual mixer/pa, it should be solved there, not on the Helix (IMO). I have never been a fan of "feedback finders"... if you don't know how to use one you just end up chasing your tail due to all the false positives. Educating the ear on how to identify and find a trouble frequency is a great skill to have! HINT: Every note on your guitar corresponds to a frequency... and if you know what those 12 frequencies are (rounded off to practical EQ frequencies) it makes it really easy to zero in quickly. You only need to know the lower range... if it's an octave or two above, just multiple accordingly... each octave is double the previous (eg: 40hz, 80hz, 160hz, 320hz, 640hz, 1.3k, 2.6k, etc... etc...) Quote Link to comment Share on other sites More sharing options...
DunedinDragon Posted April 30, 2019 Share Posted April 30, 2019 Normally the best automatic feedback systems tend to be on some of the newer digital mixers and work great. As stated before you can manually simulate the process with a parametric EQ using a pretty high Q setting and a negative gain value of around -6db then roll up through the frequency range until you knock it out. Then add volume to your output and do it again. Keep repeating the process until you've knocked out the offending frequencies then return your volume back to normal. This ensures you've addressed all the feedback frequencies and have plenty of headroom. Or...you can just get a soundhole cover and not have to worry about it. Quote Link to comment Share on other sites More sharing options...
tjbassoon Posted May 3, 2019 Author Share Posted May 3, 2019 Thanks for the feedback (pun intended) folks. Right now I'm using this microphone thing with a different instrument other than guitar, and just testing with my home PA which has no mixer, just Helix to stereo FRFR powered speakers. I put the tube preamp block with some low cut and then a couple of parametric EQ blocks after it so I had a number of slots. Thanks to this thread, I have learned that I have been thinking of Q in a parametric EQ completely wrong. Higher number is more focused! Go figure. So I managed to notch out four frequencies (I have a tuner that identifies the Hz as well, since I'm not that immediate at the pitch/Hz relationships yet) that were feeding back and could get a really much louder sound without problems. Quote Link to comment Share on other sites More sharing options...
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