From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2001-05-19 13:10:23
Hi,
----- Original Message -----
From: <jiva_at_humboldt1.com>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Saturday, May 19, 2001 2:47 AM
Subject: [buildcheapeeg] Re: Sound Card-Phase II
...
> I've no idea how much cpu horsepower is consumed in the process.
> What little I've read and understood suggests the sampler
> does it's thing until a buffer is full then notifies.
That is right. But then you get a pointer to a buffer and must evalutate
its contents - and that will require some cpu power.
...
> the low end ($20 street) turtle beach mentioned way back specs as:
> Sampling Rates: up to 48kHz in 1Hz steps.
That is not very far from the 44kHz I assumed. Therefore I have some
doubt, that we will get more than 7 Bits resolution from a FM demodulation
in software.
In some way this is less performance than using the PC-gameport as an ADC.
(I have done this some time ago, and it worked quite well under DOS)
> Audio Converters: 18-bit ADC and DAC with sophisticated sample rate
> conversion for high quality digital mixing.
For decoding a FM signal the ADC resolution of the soundcard ADC
is not so crucial.
Regards,
Joerg
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