[doctorcilantro]

Can you tell me what the rumble filter parameters are for the VST 192 and 96?
 
thanks!
J

 

[jiiteepee]

Quote:

Can you tell me what the rumble filter parameters are for the VST 192 and 96?
 
thanks!
J

On both, I used a 12th order (72dB/oct) Butterworth HP filter with 'roll-off' frequency set to 18Hz (my Vinyl setup has a sharp/loud spike around 10Hz so I wanted it to become fully removed).
 
If you want to use different filter order and/or frequency, it's quite easy to do in those SynthEdit projects which can be downloaded from my RIAA pages ... just open the project file, right-mouse-click the Subsonic filter (L) object, select Properties... and make the change (order/frequency) ... remember change the (R) channel as well ... then just save the project and then save as VST ....
 
jiitee

 

[doctorcilantro]

http://www.amr-audio.co.uk/large_image/PM%20PH-77%20Short%20V2.4.pdf
 

 

[JDUBS]

Hey Guys
 
Is anyone using this eq curve, currently?  
 
I'm curious how accurate it is vs. something like Pure Vinyl:
 
http://www.channld.com/pure-vinyl_specs.html
 
Thanks,
Jim 

 

[doctorcilantro]

I never compared the two, and I have moved on. I'm back to analog with an Allnic phono stage.

 

[jiiteepee]

  Hey Guys
 
Is anyone using this eq curve, currently?  
 
I'm curious how accurate it is vs. something like Pure Vinyl:
 
http://www.channld.com/pure-vinyl_specs.html
 
Thanks,
Jim 

 
There's some specs given at http://jiiteepee.tripod.com/de-pre-emphasis.html . Remember that those released coefficients are for biquad filters which are not the most accurate ones ... if needed, few years ago Robert Orban released coefficients for higher order filters as well at DSPRelated - http://www.dsprelated.com/showthread/comp.dsp/73300-3.php#tabs1-chronological (specs given there).
 
EDIT:
Digital filter beats the analog in accuracy for sure but, you still need the matched (connection capacitance/impedance) analog pre-amp for to gain the signal (though, its possible to gain in digital domain quite a bit w/o hearable distortion).
Easiest way to get suitable flat pre-amp for digital RIAA is to bypass the RIAA EQ stage of an analog RIAA pre-amp (I've build few of these by just using jump wires but, to get good output gain level (~40dB for MM) it's better to copy the original RIAA EQ stage schematic into a software as like LTSpice - http://www.linear.com/designtools/software/ and then make some simulations to find the proper components for needed output gain).

 

[JDUBS]

   
There's some specs given at http://jiiteepee.tripod.com/de-pre-emphasis.html . Remember that those released coefficients are for biquad filters which are not the most accurate ones ... if needed, few years ago Robert Orban released coefficients for higher order filters as well at DSPRelated - http://www.dsprelated.com/showthread/comp.dsp/73300-3.php#tabs1-chronological (specs given there).
 
EDIT:
Digital filter beats the analog in accuracy for sure but, you still need the matched (connection capacitance/impedance) analog pre-amp for to gain the signal (though, its possible to gain in digital domain quite a bit w/o hearable distortion).
Easiest way to get suitable flat pre-amp for digital RIAA is to bypass the RIAA EQ stage of an analog RIAA pre-amp (I've build few of these by just using jump wires but, to get good output gain level (~40dB for MM) it's better to copy the original RIAA EQ stage schematic into a software as like LTSpice - http://www.linear.com/designtools/software/ and then make some simulations to find the proper components for needed output gain).

 
Thank you, sir!!  I'm currently using an audio interface (TC Impact Twin) which has 40db of flat gain on its two instrument inputs.  It has 1mm ohm input impedance on those inputs so I bring it down to 47kohm input impedance (suitable for my MM cartrdige) via a 49.3kohm resistor on each channel's cable.  For capacitance, I use really low capacitance cable and then use a soldered in 150 pf Wima capacitor to get me at the right capacitance for my cartridge.  
 
I then run the output of my turntable via the cables I made into the TC Impact Twin.  It converts the analog to digital at 192khz (in JRiver) which then get's played back via JRiver at 192khz.  I'm using Voxengo CurveEQ and it sounds great but I feel like your solution may be better yet!!
 
-Jim

 

[doctorcilantro]

How are you monitoring the input using JRMC? I sent you the VSTs via PM.