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REW Graph Advice needed
Old 18th September 2011
  #1
Here for the gear
 

REW Graph Advice needed

Just need some help with understanding the graphs made using REW5. The room has been treated with various bass traps, mainly in and around the listening position where the monitors are situated. We don't have before graphs as we didn't have the test mic until after the work was done. The graphs to us look pretty equal and the sound in the room has greatly improved to the ears. Just want to know if we should be happy with the graph or is there more work to do.
Attached Thumbnails
REW Graph Advice needed-listen-pos-graph.jpg   REW Graph Advice needed-waterwall-listen-pos.jpg  
Old 18th September 2011
  #2
Gear Guru
How it is.

This may help.https://www.gearslutz.com/board/studi...er-v2-1-a.html
Use the time scale and lowest viewed level threshold to make those modes nicely tail off down into the noise floor. They are currently cut short.
Don't know about the 'looking equal bit'. Lets be more specific.
There is something going on at 4 and 7 K. Need to identify that and see it gone.
The dip at 150Hz also needs to be looked at. Try to find the cause and fix it!
Changes of speaker and or listener position may improve this one very cheaply.
DD
Old 19th September 2011
  #3
Lives for gear
 
ggegan's Avatar
The 4k and 7k ridges kind of look like noise floor issues, the way they just kind of stick out straight with no fall off. Maybe singing light filaments from a dimmer, or perhaps a hard drive? Just guessing.
Old 19th September 2011
  #4
Lives for gear
 

with the 'smoothing' set at 1/6 ....

too much detail [and possible ugliness] is hidden.
Old 19th September 2011
  #5
Here for the gear
 

Quote:
Originally Posted by DanDan View Post
This may help.https://www.gearslutz.com/board/studi...er-v2-1-a.html
Use the time scale and lowest viewed level threshold to make those modes nicely tail off down into the noise floor. They are currently cut short.
Don't know about the 'looking equal bit'. Lets be more specific.
There is something going on at 4 and 7 K. Need to identify that and see it gone.
The dip at 150Hz also needs to be looked at. Try to find the cause and fix it!
Changes of speaker and or listener position may improve this one very cheaply.
DD
Hi... thanks for quick reply,How do you fix a lull/dip(say the at the 150k)? if there is a peak i guess absorption is needed...but a lull/dip? Would room pics help too? also how might we find those 4 - 7k peaks? as these are not bass probs right? we are pretty much noobs to this so ur help is greatly appreciated
Old 19th September 2011
  #6
Here for the gear
 

Quote:
Originally Posted by ggegan View Post
The 4k and 7k ridges kind of look like noise floor issues, the way they just kind of stick out straight with no fall off. Maybe singing light filaments from a dimmer, or perhaps a hard drive? Just guessing.
Thanks mate...yes there is the pc close by...plus an external HD...so ill try the HD off....any other ideas? the floor in this area is full carpet underneath will laminate on top...or could it be the desk reflections? cheers
Old 19th September 2011
  #7
Here for the gear
 

Quote:
Originally Posted by RJHollins View Post
with the 'smoothing' set at 1/6 ....

too much detail [and possible ugliness] is hidden.
hi...thanks...which res is best?...noticed most people using 1/6...and some people saying not to worry too much at higher freq...bass is the prob areas usually...but these seem not too bad...right?
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