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Junior Varsity
-20dB Tools
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<blockquote data-quote="Riley Casey" data-source="post: 212678" data-attributes="member: 125"><p>A couple of phones ago I had the Faber Acoustic tone generator 'calibrated' to deliver -18dbv into a generic high impedance line level input by running the iphones' hardware volume all the way up and then entering an output level on the app numerically, something like 95.6% level. I checked that a few times over the course of a few weeks after I had set it up and it seemed fairly solid. Never bothered to try it with my last couple of phones and not something I'd run past NIST but it was easier than trotting out a bench oscillator and audio volt meter.</p></blockquote><p></p>
[QUOTE="Riley Casey, post: 212678, member: 125"] A couple of phones ago I had the Faber Acoustic tone generator 'calibrated' to deliver -18dbv into a generic high impedance line level input by running the iphones' hardware volume all the way up and then entering an output level on the app numerically, something like 95.6% level. I checked that a few times over the course of a few weeks after I had set it up and it seemed fairly solid. Never bothered to try it with my last couple of phones and not something I'd run past NIST but it was easier than trotting out a bench oscillator and audio volt meter. [/QUOTE]
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