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FrequenSee - Spectrum Analyzer?
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Popularity Score: 5
This app was mentioned in 5 comments, with an average of 2.60 upvotes
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Straight to the point frequency analyser. Great for finding that frequency that's feeding back when you're under pressure.
That sounds like tinnitus to me. Tinnitus can be all types of sounds, it can be a very low or very frequency and it can sound like rumbling, buzzing, whistling, static etc...
The best way to check is to download a frequency analyser for your phone, this is a great one as it detects all the frequencies around you.
if you go to the ap store and type in "frequency analyzer" and "free" you will see quite a few results. likewise the Itunes store.
I use the frequenSee ap primarily. but I have several more free aps with various features.
https://play.google.com/store/apps/details?id=com.DanielBach.FrequenSee&hl=en
turn it on and it "listens" through your phones' mic and shows a realtime graph of frequencies. the feedback peaks will be evident. The scale is logarithmic so if you are not familiar with how that looks, read up to read it correctly - or find an ap that shows the peak frequencies numerically.
during set up, push the volume on the master up to force feedback and see where the peaks are. then adjust those frequencies down with the EQ.
google "ringing out a room" for more on this.
if you are trying to use conventional mics at a distance from the talent for sound reinforcement you are going to have a bad time.
Probably yes. Get a free app like these and see for yourself. I like the second one a lot, it graphs you frequencies over time so you see the changes.
https://play.google.com/store/apps/details?id=com.DanielBach.FrequenSee
https://play.google.com/store/apps/details?id=com.symbolic.pitchlab
I use the app frequensee a lot for something similar it seems.