[LAD] [ot] rme fireface: weird balanced output measurements

Jörn Nettingsmeier nettings at stackingdwarves.net
Sat Feb 18 12:47:03 UTC 2012


fons, gene,


thanks for your insights, particularly about the problems of AC rms 
meters at audio frequencies - i was totally ignorant of this, and i'd 
have shot myself in the foot with this eventually.

fons, after i read your remark i asked around, and yes, the ff800 does 
indeed use servo-driven outputs, so the voltage difference is 
intentional and no cause for concern. i'll definitely investigate the 
level differences between channels, but as you said, i'd better do that 
with a sound card rather than a meter.

gene, would love to follow your scope advice (particularly for the 
beneficial effects on gonads), and i'm looking out for one, but i'm not 
really prepared to pay much. in any case, it's way sexier than one of 
those usb sampling gadgets sold for a scope these days... maybe i'll 
find a nice, simple one in a dumpster somewhere.

nice to get you two guys into another discussion about signal 
transmission - very instructive!

best,


jörn


btw: yes, the folkwang address seems to have expired at last. the la* 
lists were the last things i used it for, and i have now resubscribed 
from my own mail domain. so please ditch that old one from your address 
books if you want to get in touch off-list.


-- 
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487

Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister (VDT)

http://stackingdwarves.net



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