You're sure your teacher ment -14dBm? (dB milliwatt)bill45 wrote:My studio maintenance teacher at Berklee said, shoot for a peak to rms ratio of -14dbm.
Not only is this value not used in Audio Engineering, it would make no sense converted if we assume 600ohm as impedance (hi Z input).
Here:
And what does he mean by "peak to rms ratio"?sengpielaudio.com wrote:What is dBm?
A logarithmic ratio with a reference power of P0 = 1.000 milliwatt ≡ 0 dBm.
The dBm is not used in audio engineering. With the known impedance value you
can convert voltage V to level dBm (power) and vice versa.
For radio frequency systems (RF), impedance matching or power matching
is absolutely essential.
Either you have a rms (average signal level/loudness) or peak (maximum volume) of a signal. Unless he meant the "crest factor", which lies on a whole different ballpark..
Let's see...bill45 wrote: In a forum discussion on the loudness wars a couple years ago, someone
said, the number 1 pop album at the time had an rms level of -7db.
K-12 from the K-Meter would mean -12dB reference point at 600ms integration time while measuring - so -12dB = 0VU.
-7dB RMS would resemble +5 on the VU, therefore we have K-12 RZ+1 (Red Zone +1). Out of the standards, mastered too loud. Upper limit I saw so far was -5dB RMS, which was a metal production (not Metallica).
Remember, there is no K-10 to "bend the rules".
In what relation? What threshold are we talking about? What attack/release times? A VCA (Voltage Controlled Amplifier) is basically a full-band compressor. Of course it will compress the entire mix if you put it on a summing bus/group channel. That's what compressors do.bill45 wrote:another Berklee teacher said When You compress the entire mix,the vca turns everything down when the signal crosses the threshold.
I can't tell you that - you have to do your own comparision.bill45 wrote:I wonder how VCC compares to these $2000 + summing amps?
But I want to remind the users of this thread, that Steven Slate once made a comparision here on KVR with a copied Da'Vinci painting. It went something along the lines of:
"On first look, it does indeed look like a Leonardo. But if you get closer, you see that it's a (good) copy. Though you miss out on all layers which made up the original painting, but the essence (the picture) is there."
VCC was a similar approach which got a little more enhanced over time.
