D
darnold
New member
What im saying is that its not going to be acurate with any mic except a mic made for that purpose. That mic has its own frequency response and it probably even has a dip at 1Khz. That is why it is a darker mic and handles screams better.
So how can you be sure you are getting room measurements if the mic is making that much of a dip to your signal. Your probably just picking up the frequency spectrum of the SM7.
Get a measurement microphone like a cheap Behringer ECM8000 and youll have better results. Even this might not be perfect because who knows if its flat in the rest of the chain but it will be much more accurate than an SM7.
If you really have a -10DB dip at 1Khz...you are in one horrible room. I can imagine those kind of dips down under 300Hz buts its going to be rare to find such a node that high up. I guess its possible though.
Also everything in your chain effects the frequency response your going to get from that CD. If you look at the mics frequency response it starts to dip around 600Hz and then flattens out at around 1khz but then boosts around 4khz. Its really only within a 3db range but thats enough to be inaccurate. Also what is the process of this. Just because it says -10 on your meters on both the preamp and the CD doesnt mean theres a -10 dip there. It just means thats the level of your preamp. The idea is to get the average of the frequencies. If everything is at 0dbs which is shouldnt because that would be clipping your preamps and it would un-usable in this situation, but if everything was 0 then all of a sudden there was a -10 dip at 1khz then you would have a dip -10dbs at 1khz. But if it averages say -5dbs through out the sequence and then the level is -10dbs at 1khz then its really only a 5db dip, then at 4khz it might boost 5dbs. So that is a 5db boost in that frequency from the average. Understand what im saying?
This would all make sense with the microphone your using. What monitors are you using? Because this could greatly effect this also. If your using home speakers then for sure you could have some problems like that. But im guessing your arnt because of the thread here. But even the monitors might have a -1 db dip at 1khz. Then you add that to say the microphone, the cables your using, the preamp that might have a dip there also, and then finally the room acoustics causing an effect then yes it is very possible to get a -5db boost there but i think the biggest cause would be equipment and not room acoustics in that area.
Danny
Danny
So how can you be sure you are getting room measurements if the mic is making that much of a dip to your signal. Your probably just picking up the frequency spectrum of the SM7.
Get a measurement microphone like a cheap Behringer ECM8000 and youll have better results. Even this might not be perfect because who knows if its flat in the rest of the chain but it will be much more accurate than an SM7.
If you really have a -10DB dip at 1Khz...you are in one horrible room. I can imagine those kind of dips down under 300Hz buts its going to be rare to find such a node that high up. I guess its possible though.
Also everything in your chain effects the frequency response your going to get from that CD. If you look at the mics frequency response it starts to dip around 600Hz and then flattens out at around 1khz but then boosts around 4khz. Its really only within a 3db range but thats enough to be inaccurate. Also what is the process of this. Just because it says -10 on your meters on both the preamp and the CD doesnt mean theres a -10 dip there. It just means thats the level of your preamp. The idea is to get the average of the frequencies. If everything is at 0dbs which is shouldnt because that would be clipping your preamps and it would un-usable in this situation, but if everything was 0 then all of a sudden there was a -10 dip at 1khz then you would have a dip -10dbs at 1khz. But if it averages say -5dbs through out the sequence and then the level is -10dbs at 1khz then its really only a 5db dip, then at 4khz it might boost 5dbs. So that is a 5db boost in that frequency from the average. Understand what im saying?
This would all make sense with the microphone your using. What monitors are you using? Because this could greatly effect this also. If your using home speakers then for sure you could have some problems like that. But im guessing your arnt because of the thread here. But even the monitors might have a -1 db dip at 1khz. Then you add that to say the microphone, the cables your using, the preamp that might have a dip there also, and then finally the room acoustics causing an effect then yes it is very possible to get a -5db boost there but i think the biggest cause would be equipment and not room acoustics in that area.
Danny
Danny
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