Note from the SM

[DCATTechie]

I just got an e-mail from the SM of the show I'm doing recommending that I turn down the bass of all actor lavs in order to "cut the fuzz" that comes through when they yell (they yell a lot in this show.
Actual Quote: "I want to hang out in blanket section during mic check and see whether we need to adjust the base level for the sound. If so, we should solve the other problem we're having -- mics going fuzzy when the actors raise their voices". In my opinion I think the cutting the base levels will not solve the problem, I consider it more of a gain issue. Am I correct or way off?

[kovacika]

Correct, this would be an issue fixed at the gain pot. Turning down the gain will reduce the over all level though, so if you need that extra level you could through a compressor on each input, which would automatically reduce the gain when a certain peak was reached.

[lieperjp]

I'm not a noise guy, but yeah, to me it sounds like gain. I seem to remember this happening during our production of The Crucible. We tried moving the mics around a little bit, too, which seemed to help.

[Eboy87]

To me, and I see the others above, it could be a gain issue. It definitely sounds like your gain structure is wonky somewhere in the signal chain. Alternatively, it could be an issue with your speakers, but I find that unlikely.

I have a problem with the wireless where I work were the receivers are constantly clipping because people don't know where a microphone is supposed to be on the actor's face. If it's too close to their mouth, it usually will be too hot a signal.

If the input channel on the board is clipping, inserting a compressor will help, but be careful; compressors can cause feedback, especially if you're not used to mixing with them. The reason is the comp essentially lowers the volume, so to make up for it, the operator usually cranks up the volume, which equals feedback.

My advice is to go through every component of your system, look at the meters on them, and see which one has the red lights blinking at you. Then report back here if it's an issue not easily solved by you.

[DaveySimps]

I agree, it is definately a gain issue. Some times theatre shows are more dynamic that the mics like to be. A compressor is a good tool to start, as previously mentioned. You might also want to think of alternative mic placement, and different mics. Many manufactureres make the same mic in different models. I know Shure, Sennehiser, and DPA all have models that have a "regular" version, and a version that can handel higher SPL found in musical theatre. I realize this last one is an expensive fix, but it is good to keep in mind when buying new mics, or renting.

~Dave

[mbenonis]

Perhaps I missed it, but I don't think anyone has said to check the gain at the mic transmitters. The way to check this is to bring each actor back to FOH (or use a remote computer view), and have them speak/sing at their loudest level. You should be just barely peaking on your RF receiver (audio level, not RF level).

Then PFL the channel on your console, and adjust your gain pot so that their loudest yelling comes out to about +3...+6 or so. Make sure your masters and channel faders are at 0 (unity), all signal processing gear is at unity, and then adjust your amplifiers to output the desired "yelling level." This sound level should be just slightly uncomfortable to listen to, since you'll always be mixing slightly lower than this. Your gain structure is now set roughly correctly.

[howlingwolf487]

I agree with Mike Benois on this one...check the transmitters first. Digital clipping and/or distortion doesn't sound very nice (sharp and sudden). Neither does analog, but it's much more acceptable to me and, in my opinion, can sound quite good if used to proper effect.

If the signal sounds "fuzzy", it is most likely analog in nature UNLESS you are not getting good reception from the transmitters. That could be another problem. Have your noiseboys make sure the receivers are getting a healthy signal and that the antennas are in as much of a line-of-sight position as possible.

If it is in the gain staging of your mixer/console, then the signal could be clipping at the preamplifier stage of the mixer, or also at any of the summing busses before the signal gets routed to an output (mains, subgroups, etc.). Don't drive the system too hard and make sure no clipping is occurring at any point in the system.

[mbenonis]

I forgot to ask, what model wireless system are you using, and with what elements?

[hsaunier]

I agree with each post. lots of variables. If your wireless equipment is not of pro level, and it sounds as if your performers are all over the spectrum dynamicly, I would look very closely at mic placement. 1" farther away from the mouth can make a huge difference in quality. This would be true with head gear or a lapel mic. If they are using head gear, and if the actor has some very vigerous blocking the mic needs to be taped in place so that you don't end up with a change in mic placement mid show. Might even consider that for a lav as well.

[DCATTechie]

The System:
3x- Beyerdynamic Opus 800 Recievers
11x- Beyerdynamic Opus 800 Transmitters
11x- Countryman Lav Mics (not positive)
1x- Behringer EURODESK SL3242FX-PRO
2x- EV SxA series loudspeakers (cant remember model name, only series)

Just to clarify, I was correct in saying that this could not be fixed by adjusting the bass and this it can be addressed in the GAIN pot?