I stumbled onto this site today and thought I'd share it with everybody. It's a geek's treasure-trove of audio-related charts, graphs and calculators. 
 
http://www.sengpielaudio.com/Calculations03.htm

+1
 
I've been using that site for a long time whenever I need an online calculator for practically any audio related function.

 
I've enjoyed that site a whole bunch too.
 
I make use of this page fairly often: http://www.sengpielaudio.com/calculator-db-volt.htm
 
The main page is a great link.
 
Thanks for sharing!
 
best regards,
mike

Thanks for posting!
 

bitflipper
I stumbled onto this site today and thought I'd share it with everybody. It's a geek's treasure-trove of audio-related charts, graphs and calculators. 
 
http://www.sengpielaudio.com/Calculations03.htm

Geek treasure-trove indeed!  Thanks for this.

Thanks Bit.  I bookmarked it.

Rimshot
Thanks Bit.  I bookmarked it.

 

Same here. Thanks.

Pop Quiz: You have two tracks, each containing white noise peaking at -12dB. If they are both routed to a bus, what might you expect the peak value to be on the bus?
 
A) 0dB
B) -3dB
C) -6dB
D) -9dB
E) -12dB
 
 

My first impulse is to say "depends on the pan laws and if the DAW you are using actually produces the results the pan law you choose is supposed to obey."
 
For example; SONAR had some pan law issues in the past and I haven't checked them recently.
 
Off the top of my head, discounting the effect of pan laws and considerations of whether we are speaking of mono tracks going to the stereo bus or stereo tracks going to to the stereo bus I am going to guess -6dBFS. (+6 dB boost)
 
If it was a measurement of SPL at the listening position I'd guess about -9dB (+3dB boost)
 
Honestly, I'm just guessing... or more accurately, I'm referring to a foggy memory... which is why it is handy to have the Seng calculator page available for the final exam.
 
:-)
 
best regards,
mike
 

The pan law shouldn't make a difference in this case, assuming both mono tracks are panned center and calculated at -12db.  If the math is done correctly, two identical audio tracks combined will increase the dB level by 6.  Usually random white noise added to other random white noise will increase the dB level by 3.  So....-9dB
 
By far the best thing on the Sengpiel page IMO is the visualization of stereo microphone techniques.  One can see how terrible XY is for a stereo mic pattern, and also plan for the optimal pattern for various recording situations.