Soundcard calibrated

maximm

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Hello everyone! I've just started mastering rew. Which cable to calibrate the sound card as balanced or unbalanced, is there a fundamental difference? Thank you!
 

John Mulcahy

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Not really. If you will be using the input with a balanced source then a balanced cable would be ideal, but there are few applications that require such precision. One of the main benefits of the soundcard calibration is picking up monitoring/feedback loops, either connection is fine for that.
 

maximm

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In the continuation of the topic. I calibre the Focusrite Scarlett 18i6 card, and get a strange spectrum at the output. What's the problem? P.S. loopback trs-trs (2 in - 2 out). The signal level is just as low.
 

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John Mulcahy

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The routing setup is feeding some of the input back to the output, input monitoring must be completely off.
 

maximm

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Everything worked out, thank you!!! But there is another point: how to adjust the signal level: the input channel amplifier and adjust the monitor amplifier or vice versa, adjust the monitor amplifier, and adjust the input amplification of the channel. The measurement results in these cases are different!
 

maximm

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In the first case: input gain - monitor gain
In the second case: monitor gain - input gain. It is not possible to adjust the signal level to -12 dB by any one amplifier because the level is weak
 

John Mulcahy

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Everything worked out, thank you!!! But there is another point: how to adjust the signal level: the input channel amplifier and adjust the monitor amplifier or vice versa, adjust the monitor amplifier, and adjust the input amplification of the channel. The measurement results in these cases are different!
Different how? There shouldn't be any difference in the shape of the response unless a gain setting is pushing the signal into clipping. The SPL at which the response is drawn will change if the input gain is altered without repeating SPL calibration.
 

maximm

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Hi! No, it's not about SPL calibration, I'm interested in the sound card calibration signal level. The first two photos show the calibration signal of the sound card installed only by the monitor pen, in the next two photos the calibration signal is set only by the amplification knob of the microphone input channel. The signal level is completely different. Adjustment to reference -12 dB in the first and second cases gives different calibration results. I wonder which pen to unscrew to the maximum when calibrating the sound card, and which pen to adjust the level to the support one. Thank you!!!
 

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