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Rockbox mail archiveSubject: Re: Microphone.Re: Microphone.
From: langhaarrocker <phil_at_x-phobie.de>
Date: Sun, 20 Oct 2002 12:43:07 +0200 On Sun, 20 Oct 2002 01:19:11 -0500, "Garrett" <GaryD_at_AdFreeInternet.com> wrote: >If you want to capture the full frequency range you will need a condensor >mic, not a dynamic. (A dynamic mic is essentially an electromagnet, with the >coil mounted on the diaphram. This weighs down the diaphram and kills the >high frequencies.) If it was that easy there wouldn't be any dynamic microphones around any more. Every microphone sounds different and it is a question of taste, not a question of the frequency range, which mic to choose. Concerning the upper frequency range: especially with the jukebox recorder you can almost neglect this as it's analog input doesn't capture frequencies > 15kHz. That's about the range of a Shure SM58, the standard vocal mic (dynamic). >A condensor mic is essentially a capacitor. The diaphram has to be charged >all the time, so the mic needs a constant direct current, i.e. >"plug-in-power" or "phantom power". The mic doesn't draw a constant current. It has to be supplied with a voltage, though. The voltage source must have quite a high inner resistance -> striclty speaking it can't be a constant voltage source as this would disable the condenser mic to alter it. >Since the JBR has only line in (meaning >5V, way more than a mic produces), you also need a mic preamp (or else a mic >with a built-in preamp). Watch out! 5V exceeds the absolute maximum ratings for the analog inputs of the MAS! (Datasheet Page 56) The datasheets claim the MAS to clip at 3.2 V on analog input when operated at 3V. Phil Received on 2002-10-20 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |