[LAU] Software algorithms?

[david]

Paul Coccoli wrote:
> On 11/2/07, david <gnome at hawaii.rr.com> wrote:
>> Paul Davis wrote:
>>> On Thu, 2007-11-01 at 08:27 -0700, william estrada wrote:
>>>> Hi group,
>>>>
>>>>    I wish to thanks all of you for the responses about 'better mics'.
>>>> I think I need to clarify what I am looking for.
>>>>
>>>>    I'm writing a suite of programs to be used for a 'Voice Messaging
>>>> System'.  The system will be used during field events where communication
>>>> from PC to PC will take place. There by the need for inexpensive hardware.
>>>> We are dealing with cheap HAMs here after all!  So supplying everyone with
>>>> a mic is going to be costly to begin with.  A preamp, which is the best
>>>> solution, will be too costly.  So I need to build a software fix.
>> I think what you need is to use cheap computer mics, not music-quality
>> ones, that should only need to plug in to an 1/8th-inch audio in
>> connection on a sound card. I don't think those kinds of mics require a
>> preamp of any kind.
>>
> 
> Yes, they do.  The preamp is built-in to any soundcard with a "mic"
> input.  A sound card mic input will be high impedance (a.k.a. Hi-Z)
> and have an amplifier (called a preamp in this case) on it in order to
> bring the signal up to line level (before it hits the ADC).

I should've thought of that. What about those computers that have mics 
built in to them?

> But I agree that is what the OP wants, assuming the computers in
> question will have mic inputs (I think most motherboards have them
> integrated these days).

The assorted desktop PCs around here all have mic inputs. So does my 
Toshiba laptop. With the popularity of Internet telephony like Skype and 
Vonage, I suspect it's probably almost mandatory in laptops now.

-- 
David
gnome at hawaii.rr.com
authenticity, honesty, community