Rockbox mail archiveSubject: Re: OT sound production
Re: OT sound production
From: [IDC]Dragon <idc-dragon_at_gmx.de>
Date: Thu, 30 Jun 2005 07:53:15 +0200 (MEST)
> please excuse the Off Topic nature of the following:
> I bring it here because there are many here who know much more than I
> I downloaded a little program which runs a sound frequency of 16,000 hz to
> 20,000 hz, intended for repelling mosquitoes.
This is a myth, fueled by people selling these little beepers. If you want
something working, spray yourself with a repellant or better use a mosquito
net. No wonder that professionals are not walking around with beepers.
> I have a couple of questions:
> Can good computer speakers reproduce a sound this high?
Good speakers can, but computer speakers probably can't.
> and can a computer
> sound card, or the Archos units produce such a frequency?
Yes. Soundcards are pretty good these days, with sample rates of 96 kHz.
Archos (and the mp3 format) can do 48 kHz max. This should be good for a
little more than 20 kHz reproduction.
But IIRC, many mp3 encoders cut at 16 kHz. So does the Archos analog input.
I don't know about it's encoder itself, when using digital in.
-- Weitersagen: GMX DSL-Flatrates mit Tempo-Garantie! Ab 4,99 Euro/Monat: http://www.gmx.net/de/go/dsl _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockboxReceived on 2005-06-30