Hi
After all those talks about AVR and their poor performances, I measured my MiniDSP DDRC-22D Dirac for SINAD, just to check what impact the DSP and Dirac can be in that story.
The MiniDSP DDRC-22D is stereo only.
Note that Dirac Stereo forces the sampling frequency to 96kHz, so that's how I measured it.
Also, this is not Dirac v2 yet.
The DDRC-22D is a purely digital device, so I measured from AES In to AES out, connected to RME ADI-2 Pro fs and with Virtins Multi-Instrument Pro 3.8.
(The RME is just used as an USB/AES converter here.)
SINAD Flat (No correction)
So no impact to speak about. Just that output signal is 10dB less, because it's compensated to allow level correction.
SINAD with correction active
We see an increase in noise floor, up to -125dB, which is around 115dB SINAD at our -10dBFS output level...
Nothing to cry wolf about.
DIRAC Correction FFR
We see some serious correction here.
(Don't worry about FFR artifacts)
Bottom line
In Stereo mode, with proper DSP implementation, Dirac is NOT degrading the SINAD value in any significant way.
After all those talks about AVR and their poor performances, I measured my MiniDSP DDRC-22D Dirac for SINAD, just to check what impact the DSP and Dirac can be in that story.
The MiniDSP DDRC-22D is stereo only.
Note that Dirac Stereo forces the sampling frequency to 96kHz, so that's how I measured it.
Also, this is not Dirac v2 yet.
The DDRC-22D is a purely digital device, so I measured from AES In to AES out, connected to RME ADI-2 Pro fs and with Virtins Multi-Instrument Pro 3.8.
(The RME is just used as an USB/AES converter here.)
SINAD Flat (No correction)
So no impact to speak about. Just that output signal is 10dB less, because it's compensated to allow level correction.
SINAD with correction active
We see an increase in noise floor, up to -125dB, which is around 115dB SINAD at our -10dBFS output level...
Nothing to cry wolf about.
DIRAC Correction FFR
We see some serious correction here.
(Don't worry about FFR artifacts)
Bottom line
In Stereo mode, with proper DSP implementation, Dirac is NOT degrading the SINAD value in any significant way.
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