Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uupsi!sunic!news.funet.fi!hydra!cc.helsinki.fi!tmottonen
From: tmottonen@cc.helsinki.fi
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: sampling
Message-ID: <1991Apr24.232415.6115@cc.helsinki.fi>
Date: 24 Apr 91 23:24:15 GMT
References: <91112.170842EERIG07@TECHNION.BITNET> <1ksgbd-@rpi.edu>
Organization: University of Helsinki
Lines: 26

In article <1ksgbd-@rpi.edu>, yhchung@aix01.aix.rpi.edu (ying-hung chung) writes:
> The Sound blaster from Creative lab can sample data from 4KHz up to 13Khz
> (I check the mannual but it never  mentions anything about the method it uses
> I think it uses just PCM with no companding)

    My SB manual says:

    "1 Digitized voice channel (DAC), programmable variable sampling 4KHz
    to 23KHz, compression schemes:
    - 8 bit data, no compression
    - 2 to 1 compression: 4 bit ADPCM, hardware decompression
    - 3 to 1 compression: 2.6 bit ADPCM, hardware decompression
    - 4 to 1 compression: 2 bit ADPCM, hardware decompression"
    and 
    "8 bit A/D conversion of sound signal, variable sampling
    rate: 4KHz to 12KHz".

    Could someone explain to me what effect the sampling rate has
    on the frequency (i.e does 12KHz sampling mean 20-12000Hz, 4KHz
    20-4000Hz etc) ?

    Teemu.
-- 
    Teemu Mottonen / Department of Computer Science / University of Helsinki
    tmottonen@cc.helsinki.fi | TMOTTONEN@FINUH | tmottone@kruuna.helsinki.fi
    address: Vapaalantie 26B, SF-01650 Vantaa, Finland / tel: + 358 0 844938