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Rockbox mail archiveSubject: Re: External Mic preamp?Re: External Mic preamp?
From: Ronald Teune <rtwolf_at_gmx.net>
Date: Tue, 07 Sep 2004 23:54:21 +0200 Hi, hey... _you_ are limbus :-P anyway, i have tried quite a nice, small preamp which seems to be from velleman (www.velleman.be) which amplifies quite a bit too i could try finding or drawing the schematic. It's spec'd to work at 9-27 volts. But now I'll just sleep :) Ronald On Tue, 7 Sep 2004 23:25:32 +0200, Manuel Dejonghe <limbus_at_gmail.com> wrote: > Hi, > > me too I am currently making some experiments with that. > > The main problem is, as you already recognised, this is a line in, and > not for mics. > I bought an electret condenser microphone from sony (ECM-TS125) which > already has some kind of preamp. Unfortunately, this preamp is rather > a driver for the ecm. A normal ecm without that element would be very > weak on a mic in too. > I hoped, this element would raise the level high enough to get it > working on the line in. And it does, but still not high enough: If I > set up the gain to the max (+19,5 db) I still can normalize the > recorded file without having to cut out the peaks. > > There are many preamplifiers, but not so much that are battery > powered, which is a not negotiable option for me. > There are some within high-professional-range with balanced xlr-plugs > as well as a digital breakout, but that's not what I need. Ok, it > would be fine, but it makes it not affordable anymore. > There are some around 50-100 euro on ebay, even within semi-professional > range. > One of the cheapest solutions (30 euro) seems to be to buy the archos > microphone, which has a real amplifier and seems to be of a fair > quality, see the list for more comments. > I'll let you know if I am making progress. > One option is to design a small circuit myself. I'm not good with > that, but it may be the cheapest solution that meets my needs. I don't > specially need high quality. > > regards, Manuel > > On Tue, 7 Sep 2004 15:06:40 -0400, Shervin Riahi <shervin_at_gmail.com> > wrote: >> Hey guys, I have a nice sony stereo microphone, but I notice (with >> much dismay) that it barely picks up any sound when I use it to record >> via my AJBR (running today's daily build). As a control, I plug my >> _headphones_ into the same port (the Line In socket), and voila, the >> device receives sound input and I can record (albeit at a very poor >> quality level). As such, I guess I need to buy some sort of preamp in >> order to boost the incoming signal, right? Any suggestions on an >> affordable one? >> >> Thanks in advance!! >> >> -Sherv >> _______________________________________________ >> http://cool.haxx.se/mailman/listinfo/rockbox >> > _______________________________________________ > http://cool.haxx.se/mailman/listinfo/rockbox > -- Groeten, Ronald Teune = 1/2 * http://www.tred.net/ _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockboxReceived on 2004-09-08 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |