Noticed lengthy discussions on normalization and found this chart that might be of interest
http://www.google.ca/url?sa=t&rct=j&q=0%20dbm&source=web&cd=4&sqi=2&ved=0CD4QFjAD&url=http%3A%2F%2Fwww.tecmag.com%2Fpdf%2Fdbm_v.pdf&ei=fN_HUK2TGIaE2gXlxoCgAQ&usg=AFQjCNEY25QxasGndqL5ZAXkYDCgFaB4KQ&cad=rja also this explanation I found useful http://en.wikipedia.org/wiki/DBm Audacity shows a scale with 1.0 as a max usually but that is PEAK only and is actually 2.0 VAC Peak to Peak RMS is 0.775 and average is closer to 0.5 so be sure to compare apples to apples and oranges to oranges I have a portable oscillator for aligning my mixer board and all other audio sections including the PC's but only have a standard digital multimeter and or a standard analog mutimeter neither of which are calibrated to read in db, dbv or dbm unlike a lot of pro audio test sets are so these relationships help to be able to use the basic meters to calibrate my systems; but one has to be very aware of the relationships and not to confuse, peak, peak-to-peak, average and RMS values in order to maintain a maximum peak range between -8 dbm and -12 dbm and still retain a further 4 db of additional headroom for protection. _______________________________________________ Rivendell-dev mailing list [email protected] http://lists.rivendellaudio.org/mailman/listinfo/rivendell-dev
