Mark Payne Posted July 31, 2010 Share Posted July 31, 2010 It took me a while and I am proud of it so I will share! If you have a filter Q and you want to convert to bandwith (in my case for entry into BSS Soundweb PEQ) here is the conversion you can put straight into XL =(LOG10(((2*(D9^2)+1)/(2*(D9^2)))+SQRT(((((2*(D9^2)+1)/(D9^2))^2)/4)-1)))/0.301 Where D9 happened to contain my Q value.I had the formulae ... It was the brackets that took the time ;-) M Link to comment Share on other sites More sharing options...
themadhippy Posted July 31, 2010 Share Posted July 31, 2010 Argh take it away. Reminds me to much of reverse engineering a 3 way crossover. That led to some fun use of bracketeryEven managed to make a pretty graph at the end that was fairly close to the published spec. Link to comment Share on other sites More sharing options...
Bobbsy Posted July 31, 2010 Share Posted July 31, 2010 Your timing is perfect! For something I'm doing with the parametric EQ in Audition I was just about to sit down and try to do something like that! You've saved me the messing around and allowed me to continue with my Saturday night drinkies un-encumbered! Thanks! Bob Link to comment Share on other sites More sharing options...
Simon Lewis Posted July 31, 2010 Share Posted July 31, 2010 And for those who haven't quite worked out what Mark's spreadsheet wizardry is all about, check out Rane Note 107... there's even a completed conversion spreadsheet you can download . Link to comment Share on other sites More sharing options...
Chappie Posted August 2, 2010 Share Posted August 2, 2010 A useful little webpage with a similar calculator can be found here. Link to comment Share on other sites More sharing options...
stu00c Posted August 2, 2010 Share Posted August 2, 2010 Powersoft do a nice flash app with Q - BW convertor; it also has a number of gain and limiter calculators too. Powersoft Audio Calculator Link to comment Share on other sites More sharing options...
Chappie Posted August 2, 2010 Share Posted August 2, 2010 That link doesn't seem to work for me. Try this one. Link to comment Share on other sites More sharing options...
stu00c Posted August 2, 2010 Share Posted August 2, 2010 That link doesn't seem to work for me. Try this one. Thanks for posting the correct link Mr Chapman! A bit of a 'Ctr + Z' error on my part . Stuart Link to comment Share on other sites More sharing options...
BlueShift Posted August 3, 2010 Share Posted August 3, 2010 Nice one Mark! Also check out Live Toolkit/Backline Calc (iPhone Apps) which has this and a number of other very useful calculations that we all find ourselves needing! Cheers Link to comment Share on other sites More sharing options...
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