Calibrating VR t560 with daw

[usert560]

Hello everyone! I use muy VR with muy computer, and i need to know calibrate well. I have this configuration:

I use logic pro with a UAD apollo.
apollo go to the main unit.
Main unit go to a amp with 0,77v. Sens.
Main unit go to the cutterhead.

The technics go to a sony hifi 90's with riaa and rhis sound go to a vumeter.

Ok i send -18dB forma the computer and recording them i adjust the vumeter to 0dB i tuen up por down directly in rhe amp to find the 0dB.

Someone know if i do al well. Is -18dB the real 0vumeter??

Thanks for all

[okpanda]

this is roughly my setup as well, only i go audio interface -> optimizer -> main unit -> cutterhead amp. -18db is about where i leave my output. all wav files are normalized. my cutterhead amp is 300 watts per channel, and i leave both channels at maximum gain. for calibration, i created a continuous tone in audacity, normalized it to 0db, and started cutting with the volume turned all the way down (so i wouldn't blow my cutterhead fuses). then i gradually increased the volume, monitoring from the record, until the levels matched. hope this helps.

[usert560]

Hello, thank you very much for your information, I have a 2x 500W amplifier at 4 Ohms that I have marked where it takes 200W to not break fuses. I do not have the optimizer and talk to Souri and he says he does not have any for sale. what does the optimizer do excatamente? I am also testing with a riaa directly from the daw and replace in riaa of the main unit. I hope to find the solution soon

[handcut]

The optimiser is an entirely passive unit for controlling stereo balance etc. It is nothing fancy. All functions can be carried out in your DAW with ease.

[okpanda]

yeah all it really does is center low frequencies and allow some very basic eq adjustments. it isn't really that essential, i just mentioned it since it's still in my chain.

[Chuan]

Hi there, this is very good reading for me as I iron out the mistakes I’m making with a new VR.

If I understand correctly here, with a test tone at -18db out of the compuer interface into the main unit I should read .77 V at the output of the main unit?

[handcut]

If I understand correctly here, with a test tone at -18db out of the compuer interface into the main unit I should read .77 V at the output of the main unit?

How are you calculating this? Have you actually measured that voltage on the interface output?

A lot of audio interfaces have an output sensitivity of around +18dBu, so -18dBfs should give you 0dBu on the output or 0.775Vrms, but you need to be sure your interface output sensitivity is +18dBu.