On Sun, 2009-08-23 at 20:08 +0200, Ralf Mardorf wrote: > > On English, for international broadcasting you need different > adjustments. But then it's important that the meter is informed about > the analogue mixer of the sound card too ;). I guess it will become > nearly impossible to fit a dBFS RMS meter to any VU meter outside the > studio in the box. An external VU meter can't be replaced by one in the > box for Linux using different sound cards.
Sure it can. Lets say your card is aligned so that 0dbFS = +18dbu (EBU standard), then 0Vu = +4dbu = - 14dbFS, so a software VU calibrated for 0Vu = -14dbFs should read the same as an external Vu calibrated for +4dbu = 0Vu. If it does not then either a calibration setting is off somewhere or one of the meters is faulty. The key is that every stage has to have a known calibration, which is actually fairly common with professional cards. I agree that VU is not that useful a meter in many ways these days, but it is arguably more useful in a production room context then a DPM as long as there is sufficient headroom (In a production room I really don't want to care about peak levels, and as long as my reference level is far enough below 0dbFS I shouldn't have to..... Regards, Dan. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
