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Rockbox mail archiveSubject: Re[2]: Microphone.Re[2]: Microphone.
From: Uwe Freese <mail_at_uwe-freese.de>
Date: Sat, 19 Oct 2002 01:32:16 +0200 Hello M., M. OReilly wrote on Saturday, October 19, 2002, 12:05:31 AM: MO> I wanted to do some microphone recording with my AJBR20, so I bought a nice MO> Sure mic. Problem is that the Archos seems to be expecting a 0dB input, and MO> the mic is only outputting -20dB (or something like that, I don't know). I MO> found that in order to get a usable audio signal, I have to run it through MO> an AC-powered mixer to boost the line signal to the point where the Archos MO> can use it. MO> Is there a way to get the Archos to use a "regular" music microphone without MO> needing an AC power source? I would like some sort of line signal amplifier MO> that uses battery power or something of that nature. I don't know if it's MO> feasible - I've been looking for a while and haven't found anything yet. I had the same problem: I wanted to connect an electret condenser mic capsule / such a mic to the AJB. I think the only way is to connect a mic amplifier to the AJB. I soldered one with an operational amplifier in it - that means it needs power, which I took from a 9V battery. The mic capsules also needs power (>1,5V, ~2mA). A dynamic mic has a greated output power, so it works with a smaller amplification (or maybe without an amplifier?). There exist simple amplifiers with transistors. So I think that's why the Archos mic is a dynamic mic. Bye, Uwe. Received on 2002-10-19 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |