To start with, everything is connect via balanced XLR cables.
Ok, from my understanding the DSD’s volume levels are in 0.5 dB increments. Let’s say I want to match a volume setting of 30 on the DSD. That’s 70 steps down from 100 corresponding to 35 dB of attenuation.
Going into the Stellar GCD, it has has 80 dB of range, some 0.5 dB increments, some 1 dB increments (as per the spec page). A setting of 76 is unity gain, so going up to a volume of 100 (24 steps) gets you +12dB, so 0.5 dB/step. Assuming the 0.5 dB increments are adjacent to a volume of 76, (this is my fundamental point of uncertainty) 16 steps down from 76 will yield 8 dB of attenuation at a volume setting of 60, so the remaining steps from 60 to 0 will give you an additional 60 dB of attenuation in 1 dB increments so that the total range is 80 dB. Ok, but I only need 35 dB of attenuation total, so I need 35 - 8 = 27 more 1 dB steps down from 60…
So, a setting of 33 on the Stellar GCD should give me 35 dB of attenuation, no?
Though from listening, this is clearly not right. A 100 setting on the DSD and 33 on the GCD is way louder than a setting of 30 on the DSD going straight into my amps.
Are there any little details I’m missing or false assumptions that I’m making?