Re: DSP Whodunnit.
« Reply #20 on: January 08, 2018, 01:14:03 PM »
I missed the duplicate numbers when I looked earlier. Will take another look at the examples.

Do you have input / output gain control settings?


Re: DSP Whodunnit.
« Reply #21 on: January 08, 2018, 01:58:27 PM »
I missed the duplicate numbers when I looked earlier. Will take another look at the examples.

Do you have input / output gain control settings?

It may have only been the No Filters situation that had matching coefficients.  A couple of the ones with filters that I just looked at did not appear to have any matching numbers.   :-\

Re: DSP Whodunnit.
« Reply #22 on: January 08, 2018, 10:53:09 PM »

Do you have input / output gain control settings?

I'm not sure what you're asking.  There are a number of gain stages in the signal path in these devices and they are controlled via documented commands.  There IS a documented command set for these units and most of the parameters are available with them.  The EQ is not documented which is why I'm trying to decode it.  I have deduced a few other non-documented commands but the EQ is a more complicated scheme.  Does this answer it?

On the topic of  Bandwidth, I have some more examples:

1Khz parametric bandwidth = 1.0 -4db
0102FC00E803F304B53F

1Khz parametric bandwidth = 0.49 -4db
0102FC00E80377BE3740

1Khz parametric bandwidth = 0.2 -4db
0102FC00E8037FA5E640

1Khz parametric bandwidth = 0.1 -4db
0102FC00E803B5CB5141

1Khz parametric bandwidth = 10 +4db
0102FC00E8030820003D

670Hz Band Pass Bandwidth = 2.54
060100009E020000003F

670Hz Band Pass Bandwidth = 5.99
060100009E022108023E

670Hz Band Pass Bandwidth = 10
060100009E020820003D

Re: DSP Whodunnit.
« Reply #23 on: January 09, 2018, 12:18:44 PM »
if you use the formula on the Rane note page to convert from bandwidth to Q them the numbers work out close enough .
IEEE754_Q=SQRT(POWER(2,bandwidth)) / (POWER(2,bandwidth)-1)

Re: DSP Whodunnit.
« Reply #24 on: January 18, 2018, 08:00:27 PM »
if you use the formula on the Rane note page to convert from bandwidth to Q them the numbers work out close enough .
IEEE754_Q=SQRT(POWER(2,bandwidth)) / (POWER(2,bandwidth)-1)

Awesome!  Thanks for your help. 
I had to divert my attention away from this for the past week but I'm still hoping to figure it out.  I tried converting to double precision coefficients but that doesn't seem to work either.  I'm starting to feel stuck and might post on the stackexchange dsp forum to see if some bright folks there have any ideas.