Ok, I've tried to read a lot and watch videos about Audyssey room correction. There are still some things I don't understand about Multi EQ and Audyssey and I hope that someone more knowledgeable can explain. If the answer is read RTFM, and there is such a thing that I just haven't come across, then I apologize:
1. The BBC dip - if I understand what they say, supposedly to remove phase distortion at a crossover centered around 2k. Don't good speakers already design this correctly, and I'm sure that not all speakers have the same crossover, so why is this applied across the board as an assumption?
2. The target curve - to the best of my knowledge, musicians and producers mix their music at the source to produce a good sounding curve that rolls off high frequencies. Then Audyssey builds in a curve that rolls off high frequencies. So doesn't that depress the high frequencies twice? Why not adjust the EQ to be completely flat, and then the speakers will reproduce whatever curve the producer created? What am I missing?
3. Forgetting the mid/high frequencies, and focusing on bass correction, at least in my room, there are some low frequency dips/dead spots, like for example in my room 38 Hz and 70 Hz. Multi EQ shows that these have been magically corrected in the target curve. Yet when I measure the response with REW the dips are still there in the same place and amplitude that Audyssey originally measured. So the target curve is just a target, but it never shows the actual improvements it thinks it can make. Is there a way to find out what EQ has been applied like a parametric EQ would use?
4. Dynamic equalization - since Multi EQ only measures the frequency response at a single volume level, how does it know how much equalization to apply at different volume levels. Do all speakers effectively have the same difference in response by sound pressure level or is this somehow based on people's hearing at different sound levels and variation of speaker brands and models not important?
Thanks in advance
1. The BBC dip - if I understand what they say, supposedly to remove phase distortion at a crossover centered around 2k. Don't good speakers already design this correctly, and I'm sure that not all speakers have the same crossover, so why is this applied across the board as an assumption?
2. The target curve - to the best of my knowledge, musicians and producers mix their music at the source to produce a good sounding curve that rolls off high frequencies. Then Audyssey builds in a curve that rolls off high frequencies. So doesn't that depress the high frequencies twice? Why not adjust the EQ to be completely flat, and then the speakers will reproduce whatever curve the producer created? What am I missing?
3. Forgetting the mid/high frequencies, and focusing on bass correction, at least in my room, there are some low frequency dips/dead spots, like for example in my room 38 Hz and 70 Hz. Multi EQ shows that these have been magically corrected in the target curve. Yet when I measure the response with REW the dips are still there in the same place and amplitude that Audyssey originally measured. So the target curve is just a target, but it never shows the actual improvements it thinks it can make. Is there a way to find out what EQ has been applied like a parametric EQ would use?
4. Dynamic equalization - since Multi EQ only measures the frequency response at a single volume level, how does it know how much equalization to apply at different volume levels. Do all speakers effectively have the same difference in response by sound pressure level or is this somehow based on people's hearing at different sound levels and variation of speaker brands and models not important?
Thanks in advance