Matilonga79
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- Jul 18, 2025
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Hi everyone, this is Mat....I'm confused with the calibration testing on REW using a Solid State Logic SSL2.
The most tutorials I've seen, indicate that you need send a 1kHz tone to set the levels of the measurement signal and the interface input volume, and you must equal both at -12 dbFS by turning the output and input knobs manually. Here's an example:
.
Well...in my own testing. First of all, I put balanced cable into my audio interface from "Input 1" (mic) to "Output L" (speaker), by creating a loopback.
Then, in the "Soundcard Preferences" on REW. I selected both as "Input 1" and "Output 1" respectively.
In "Calibration Soundcard", by keeping all the knobs on zero, I send a 1kHz tone at -12 dB and then I tried to match levels turning the output knob ("monitor level") and the gain doesn't increase at all...not so when I use the input knob, which does decrease / increase proportionally each time when I turn it. This prevents me reach the minimun gain level for the required measurement, so the test is invalid (I only get almost -60 dBFS, so far from -12).
But doing some changes, when I select the input field as "Loopback L" instead "Output 1", the level matching adjusted automatically at -12 (without the need to adjusting input and output knobs manually).
Like this:
After that, I could calibrate the soundcard and get a perfect flat frequency response of my audio interface. Similar that showed the last video.
What is the correct way to use?. Why the output knob doesn't respond when its turned up or down? (in speaker monitoring it works perfectly).
Thank in advance, I hope you could help me.
The most tutorials I've seen, indicate that you need send a 1kHz tone to set the levels of the measurement signal and the interface input volume, and you must equal both at -12 dbFS by turning the output and input knobs manually. Here's an example:
Well...in my own testing. First of all, I put balanced cable into my audio interface from "Input 1" (mic) to "Output L" (speaker), by creating a loopback.
Then, in the "Soundcard Preferences" on REW. I selected both as "Input 1" and "Output 1" respectively.
In "Calibration Soundcard", by keeping all the knobs on zero, I send a 1kHz tone at -12 dB and then I tried to match levels turning the output knob ("monitor level") and the gain doesn't increase at all...not so when I use the input knob, which does decrease / increase proportionally each time when I turn it. This prevents me reach the minimun gain level for the required measurement, so the test is invalid (I only get almost -60 dBFS, so far from -12).
But doing some changes, when I select the input field as "Loopback L" instead "Output 1", the level matching adjusted automatically at -12 (without the need to adjusting input and output knobs manually).
Like this:
After that, I could calibrate the soundcard and get a perfect flat frequency response of my audio interface. Similar that showed the last video.
What is the correct way to use?. Why the output knob doesn't respond when its turned up or down? (in speaker monitoring it works perfectly).
Thank in advance, I hope you could help me.
