Scott, that would be great but does your amp have a line level output?
It is always possible measure what is going out of the speaker level outpus, but it requires special care and equipement, and it also adds new variables.
May have some downtime available this week.
Got Fuzzmeasure working again and a BLU-100 I can load up w/M2 bits.
(don't let that preclude someone else contributing).
Great, thank you!
If you could export the measurement as a txt or wav impulse then I should be able to compare it to the FIR used in the openDRC.
Dear all,
I can try to feed one of BSS BLU units with the original JBL M2 file and do a curve of high and low at the end of the week to back up Grumpy.
Kind regards
//RoB
The solution to the problem changes the problem.
-And always remember that all of your equipment was made by the lowest bidder
Probably old news, but I noticed that JBL has posted a M2 DCi tunings file on their web site. I wonder what differs compare to the original file?
Kind regards
//RoB
The solution to the problem changes the problem.
-And always remember that all of your equipment was made by the lowest bidder
I would also be very grateful if I could see the output of your guys' BSS units with M2 tunings.
FuzzMeasure (4.1)-> MOTU Traveler(D/A)-> BLU-100 (M2 macro)-> MOTU Traveler(A/D)-> FuzzMeasure
Here is a comparison of the magnitude response of the BSS measurement Grumpy send me (thanks!) and the FIR one directly derivated from the EQ settings with rePhase :
As can be seen there are some differences, especially up high, and some trends that appeared in measurements also appear here.
The Q in the BSS appear higher than normal up high, with other defects, which is a often the case with IIR units.
rePhase EQs are exact whereas the ones from the BSS suffer from biquad approximations.
Of course the target response is the BSS one, as this is the one JBL wanted to achieve, and any defect or approximation in the way EQ are handled in the unit was factored in...
I will try to adjust settings in order to approach the BSS (and hopefully Crown, which should be identical) response curve with rePhase.
Of course if another IIR DSP unit were to be used, things would be different (not necessarily in a good way )
Stay tuned!
Took me some time but I managed to adjust the Q and dB settings just a bit to get a good match.
I also had to add 3 very gentle EQ points...
Some modified EQ points are on the input section, so the same modification should also be applied to the LF settings (as well as other modifications, but that will have to wait for now...)
Here are the associated rePhase settings (copy and use the "load from clipboard" functionality).
I will try to update the google doc soon...
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Hi pos,
I'll start by saying my background in signal processing is, shall we say, limited.
You mention that biquad implementations of IIRs are often imprecise. Do FIRs not suffer from this at all? More to the point, is it safe to assume that rephase predictions will be exactly reflected at the output of an OpenDRC unit?
By the way, thanks for making those adjustments, and thanks grumpy for helping find that out!
The rephase settings above have format set to "32 bits floats mono (.txt)". I could be mistaken, but to get miniDSP to load it I think it needs to be changed to "32 bits IEEE-754 mono (.bin)".
Adjusted settings
Code:rePhase settings eNrtW01v4zYQ/SuCTlvEJkjqy8qxbQ4tGnR73g0E2qJtIZKoUnSy2WD/e4ek5NCyNm2QoGgDIkYs Pg5nhm+GGkMDPYZr8aXYVrXisg8vP30Kw0UYJeHNYubqZhFueAuSVbsLL0PS9DCx2fPNbX9oAFhj nFKcJjHNCXxKviZsG5WMbMsoSTZYS0vR91N7BGM82nnba/AYbPGWNRz8u6bFvtrti+vffw71hDxx RE8tO9brTcEnXsE/ihLtNUYZzlwDXvaFsjoQQjZMQRgiGqwr1Qe/XF1dLbMkDhrRiuADWlftD+Eo V9xBXCrR6jxDOAJ8xyo9Wq5QrPXv+J8QtseQbVR1B9Eli7BhX7R6mOz2rOeF5DVTVkdTtVVzaJZm AgTUQ6czYiPaXrFWBX8AdsfqA7e5cEEQASTB2lKG7GYBTGCYGzBB8Qhqg4SYTRMruQSX9Sg1ohFK R5RqfhLjP6Gu0oia9atBK7brsVlPBvvvDLz5tpiJXvoG0VvGNkWy1NKfHJl2fIggbiYqCSSqHhMD xwgnY7SIAfCQBDaIFxSZcR6ZVSQ6QQmh9jsb4XhMBP2dDkrwIH1G0f8dnY8poS8Iar/n9R0UmEDf WyanMkEmohk98WOJB5YT6wkdAv5uWf4vxPRNzilGqdYT24NKUTbGk+p7IqXDQSUzrtFZhz36t+hs ONPXB9OeQJTq0FFjW1uM0UoX7yMQ5SjKqAOk+rQ+DfMcUeLOkyRDce6q1DdxR1+KVsmJvhzlqavA 7N3RtwKFJ/pIjlYOEJ8uSKM4RxOFmevQcHN3FEa50eeZ9kx7pj3TnmnPtGfaM+2Z9kx7pj3TnmnP tGf632f6ZhHuJOv2Rc+Vqtpdb/oH5bowpCcLc6l7DMsMw4Dv7ARZjSMzZ4b7quSFDcVluLRPjvdf rXwEDmA71AsIXN+D2VGc6IiPRrFjNHqNUTo1+pxV4polb2iWPmvVNfoKm8kL+I3dnVL8mq3qzD2x OzV7ll6FZO2tEayeaTWSXgVCllzq8wOZ3R7q+ql7lq2ohWa6bTSeStvT5cWfFYc4NZz1B8kb3qrw 8jFcP5il5jQyxSBEZvHx341tPhZiu4XYQmqYvHBzRTcLq/aOy3EWbsrqACq1N6pquLv22yJshdLL fv3xt+CaBqYpLmB1MKbO5/Yn0XSS97oFGpSyspMbXQw+w99H8BewoJOgyKBBy9W9kLdB1Qf9oetE z8tAiWDNg6oNupptePCh7lh5sWGdbrOKDvyqvh7ri4AUZIpPZoptLYQ0bVe9re57Tdccz/UDxuq0 NL3b86LV16Ljk8KF3NLlPsh2CtgEHsvYBLbFbAKOJW0Cj4VtajDBM9ZskTuzZkvdVPHZA3mn7J1Z s8VvAsdzKsZCeG4uO9/G2H+cmjOl8Zm2QI7fKKj+18g/+d3n6fZ0e7o93Z5uT7en29Pt6fZ0e7o9 3Z5uT7en29Pt6fZ0e7rfc3+yEzWTlXoA9lohG91IYE1XO+2DbS2YGnH7Hl68sk93e7FV90xq6iX/ OPSJR7DoD+vhNbiZyZOXrczDYRCfvqZHjy/XnV6B34p1utmRkjgeGx5lJW1n4mkvx7yQw9Sx3wGT 91Vbinu7oz1r2/DbXxp3d4M=
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