> > > >---- Original Message ---- >From: [EMAIL PROTECTED] >To: [email protected] >Subject: Re: ALSA sound recording frustration >Date: Thu, 27 Nov 2008 19:15:50 -0600 > >>On Thu, Nov 27, 2008 at 07:06:42PM +0200, Rob de Graaf wrote: >> >>> > The headphone connector is for headphones, it is not for >connecting >>> > recording devices: If the voltage and/or current are too >high/much, >>> > you can damage the soundcard. >>> >>> An input which measures voltages (here the microphone input) has >>> infinite large impedance, hence no current will flow. >>> >>> You are correct by the amplitude of the voltage. >> >>How can there be voltage (or voltage measured) without current >>flowing? >> >> >>http://en.wikipedia.org/wiki/Volt: >> >>"The volt is defined as the potential difference across a conductor >>when a current of one ampere dissipates one watt of power." >> >> >>no current <--> no voltage >> >> >>-- >>"Don't let them, daddy. Don't let the stars run down." >>http://adin.dyndns.org/adin/TheLastQ.htm >>
I think you are stretching the definitions here. The input impedence really isn't "infinite" it's just very large. As a result a very small (but non-zero) current will produce the voltage. Ohms law still holds Larry >> >>-- >>To UNSUBSCRIBE, email to [EMAIL PROTECTED] >>with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] >ebian.org >> >> >> -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
