Hello REW forum
I am a newbie to accoustic testing, a musician setting up my room with some basic treatment and I have been hovering around some of the forums digesting as much as possible. I have a number of questions and first I will start with my problems I am having with REW.
I keep getting error messages stating the Impulse Response is not in the correct place and that my signal level is too low to get an accurate measurement. I posted over on Gear Sluts and I was told that Apple is not confroming to the Java protocol which can cause these issues and to buss the mic signal to the internal audio of my mac which could be better for REW. So while i have data that seems appropriate when I cross reference the numbers from REW to a modal calculator I have doubts about whether its accurate or if there is a user error on my part. and I can't obtain more than 2 tests without getting errors so I cant move the mics to keep testing or move some of the treatment/ monitors and retest etc.
3 Questions are: Is there anything I can do to correct the messages? Does the data from REW seem consistent with the room dimentions so can I trust the results and keep testing? and if so, most other waterfalls I have seen posted have much shorter decay times so I think I making a mistake ? If i have missed some tutorials please direct me.
my testing setup
I am using a matched pair of Josephson c42 in xy pointed at the monitors and routed to from the pres to the line in of the mac ( as advised) and testing L then R. My mic levels are as close to clipping on input as I can get within a few db (and I still get the message that my levels are too low - REW reports levels as low as -79 db and the highest at -37 db even with consistent levels from the mic pre's). i'm running the test in full range and my monitor system is 2.1. The output level from REW is set to -20 and the line out of the card is set to nominal on my audio interface ( output from my Fireface 800 and input to mac via Fireface sends) Mac Os 10.5.8 mac pro 2.8 ghz
AFAIK my JRE/ Java is the latest released.
Here are the a basics of the room as a cross reference for anyone looking at the waterfall plots
L1 221" - 18'5"
L2 266" - 22' 2' there is a closet / alcove in the left rear of the room 24" w
W 94" - 7'10"
H 79" - 6'7"
modes
100 (1) 25.5 51 76.5 102 127
100 (2) 30 61 92 123 153
010 72 144 216
001 85 171 256
110 (1) 76 153 230
110 (2) 78 156 235
101 (1) 89 179 268
101 (2) 91 182 273
011 112 224 336
Thanks
Apologies in advance if I have totally missed some details in the manual or here.
phi
I am a newbie to accoustic testing, a musician setting up my room with some basic treatment and I have been hovering around some of the forums digesting as much as possible. I have a number of questions and first I will start with my problems I am having with REW.
I keep getting error messages stating the Impulse Response is not in the correct place and that my signal level is too low to get an accurate measurement. I posted over on Gear Sluts and I was told that Apple is not confroming to the Java protocol which can cause these issues and to buss the mic signal to the internal audio of my mac which could be better for REW. So while i have data that seems appropriate when I cross reference the numbers from REW to a modal calculator I have doubts about whether its accurate or if there is a user error on my part. and I can't obtain more than 2 tests without getting errors so I cant move the mics to keep testing or move some of the treatment/ monitors and retest etc.
3 Questions are: Is there anything I can do to correct the messages? Does the data from REW seem consistent with the room dimentions so can I trust the results and keep testing? and if so, most other waterfalls I have seen posted have much shorter decay times so I think I making a mistake ? If i have missed some tutorials please direct me.
my testing setup
I am using a matched pair of Josephson c42 in xy pointed at the monitors and routed to from the pres to the line in of the mac ( as advised) and testing L then R. My mic levels are as close to clipping on input as I can get within a few db (and I still get the message that my levels are too low - REW reports levels as low as -79 db and the highest at -37 db even with consistent levels from the mic pre's). i'm running the test in full range and my monitor system is 2.1. The output level from REW is set to -20 and the line out of the card is set to nominal on my audio interface ( output from my Fireface 800 and input to mac via Fireface sends) Mac Os 10.5.8 mac pro 2.8 ghz
AFAIK my JRE/ Java is the latest released.
Here are the a basics of the room as a cross reference for anyone looking at the waterfall plots
L1 221" - 18'5"
L2 266" - 22' 2' there is a closet / alcove in the left rear of the room 24" w
W 94" - 7'10"
H 79" - 6'7"
modes
100 (1) 25.5 51 76.5 102 127
100 (2) 30 61 92 123 153
010 72 144 216
001 85 171 256
110 (1) 76 153 230
110 (2) 78 156 235
101 (1) 89 179 268
101 (2) 91 182 273
011 112 224 336
Thanks
Apologies in advance if I have totally missed some details in the manual or here.
phi
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