What is your practice ?So, in practice it is better to adjust the gain with a trimpot.
The justification for the attenuator on this unit is that many people are operating at much higher levels today.
Hi Jay, isn't your summing box going to be connected to the UMC1820 input not the output? So you need to know what level at the input relates to -18dFS.
I've used the Klanghelm VU meter plugin on mastering playback which allows calibration at any FS level, I usually set 0VU=-9dBFS as this is about where a CD level might be.I don't use a computer fro recording so some of this is guesswork. I assume the meters on most DAW software just hits the top stop at 0dBFS. So, how about someone making a VU meter plug in that can be set so 0VU us an dBFS you like.
that's about 10dB too hot for Vu balistic are you sure it's not a PPM meter ?0VU=-9dBFS
No, it's a VU meter and the VU ballistic is the same. The meter is being fed with the correct current for the VU reading, however the circuitry prior to the VU meter is performing the gain operation to allow calibration to an incoming signal.hi
that's about 10dB too hot for Vu balistic are you sure it's not a PPM meter ?
meaning ? it still show 0Vu with a -9dBfs 1k test tone ?however the circuitry prior to the VU meter is performing the gain operation to allow calibration to an incoming signal.
OK, it is easy to become confused by this. First tell me what mixer you use for summing.Hi Ian!
Well, the Daw outputs go to the summing inputs, andthe output of the summing mixer goes to the interface inputs. I control the level that goes to the interface inputs with the output level potentiometer of the summing mixer. The interface max input level is +11dbu....I don't understand the second part referred to the input level and -18dbfs... here i'm lost...
It all depends on the actual DR index. At calibration, a sinewave at 0 VU corresponds to +3dB peak. That means that the peak voltage achievable without digital overload is 12 dB above, which is compatible with many mixes.I have hard time to understand how you can have a 0Vu @ -9FS and not overshoot digital 0FS ?