Hi,
I have been learning how to get the most out of REW and have watched many videos and read many tutorials, but I am still a bit unclear on a few specific questions.
The results are really good so far, but maybe I can do better with a little help in creating the best filters!
Approach: I measure L and R speakers individually using a moving microphone with a UMIK-1. I use the 90 degree calibration file. I have a house curve file loaded which I found in this forum and I add a touch more bass using the "Add room curve" in the UI (I guess I am in the preference group with untrained listeners).
For target settings I have "Full range speaker" set (the speakers is a 2.5-way Wharfedale Diamond 230 which reach down to ~35Hz). The LF slope is 24 dB/octave.
Q1. I use "Calculate target level from response" to set the target level. In my room the right speaker is in a corner, so if I calculate the target level from the right speaker the level is much higher (0.4dB). I currently use the target level from the quieter, left hand speaker. Is this right or should I average the target levels of both speakers?
Q2. I can see the bass response falls off a cliff around 38Hz so I set the "LF Cutoff" to be 38Hz so the curves between the measurement and the target pretty much align. Does this sound about right? (looks pretty bad at this point, but it is a cheap speaker )
FYI This graph has 'Psycoacoustic' smoothing on. Blue is the target curve and green is the actual measurement.
Previously, I was using the "Match response to target", but have now started creating my own filters and I think I am getting better results when A/B-ing between them.
Q3. When creating my own filters I generally only cut the only exception being a boost for the dip from 1-3.5kHz. I now create a set of filters to try to fix things.
Red is with my filters applied.
The right hand speaker is much more of a problem due to its corner placement. I guess I need some form of a bass trap, but I am trying to compensate using large negative high Q filters. That peak at 103Hz is a bit of a disaster. The red line shows the predicted curve after my filters (which include a -25dB at 103Hz!)
I then load these onto my Raspberry Pi running Volumio.
I just did a quick measure to test how these work and that leaves more questions.
Left speaker. Dotted line - original, dashed line - predicted, solid line measured. I think I need to reduce the filters around 200-400Hz!
Right speaker. Dotted line - original, dashed line - predicted, solid line - measured.
All a bit of a mess, but lots of fun.
Any thoughts would be appreciated.
Thanks,
John
I have been learning how to get the most out of REW and have watched many videos and read many tutorials, but I am still a bit unclear on a few specific questions.
The results are really good so far, but maybe I can do better with a little help in creating the best filters!
Approach: I measure L and R speakers individually using a moving microphone with a UMIK-1. I use the 90 degree calibration file. I have a house curve file loaded which I found in this forum and I add a touch more bass using the "Add room curve" in the UI (I guess I am in the preference group with untrained listeners).
For target settings I have "Full range speaker" set (the speakers is a 2.5-way Wharfedale Diamond 230 which reach down to ~35Hz). The LF slope is 24 dB/octave.
Q1. I use "Calculate target level from response" to set the target level. In my room the right speaker is in a corner, so if I calculate the target level from the right speaker the level is much higher (0.4dB). I currently use the target level from the quieter, left hand speaker. Is this right or should I average the target levels of both speakers?
Q2. I can see the bass response falls off a cliff around 38Hz so I set the "LF Cutoff" to be 38Hz so the curves between the measurement and the target pretty much align. Does this sound about right? (looks pretty bad at this point, but it is a cheap speaker )
FYI This graph has 'Psycoacoustic' smoothing on. Blue is the target curve and green is the actual measurement.
Previously, I was using the "Match response to target", but have now started creating my own filters and I think I am getting better results when A/B-ing between them.
Q3. When creating my own filters I generally only cut the only exception being a boost for the dip from 1-3.5kHz. I now create a set of filters to try to fix things.
Red is with my filters applied.
The right hand speaker is much more of a problem due to its corner placement. I guess I need some form of a bass trap, but I am trying to compensate using large negative high Q filters. That peak at 103Hz is a bit of a disaster. The red line shows the predicted curve after my filters (which include a -25dB at 103Hz!)
I then load these onto my Raspberry Pi running Volumio.
I just did a quick measure to test how these work and that leaves more questions.
Left speaker. Dotted line - original, dashed line - predicted, solid line measured. I think I need to reduce the filters around 200-400Hz!
Right speaker. Dotted line - original, dashed line - predicted, solid line - measured.
All a bit of a mess, but lots of fun.
Any thoughts would be appreciated.
Thanks,
John