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From: jk87377@korppi.tut.fi (Kouhia Juhana Krister)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Amigas shipping with 16-bit audio?
Keywords: PAULA SOUND AUDIO MUSIC 16 BIT
Message-ID: <1990Jul16.195933.23430@funet.fi>
Date: 16 Jul 90 19:59:33 GMT
References: <1990Jul14.173215.25433@ux1.cso.uiuc.edu> <5958@hub.ucsb.edu> <1990Jul15.215912.25094@funet.fi> <5119@ethz.UUCP>
Sender: news@funet.fi (#News )
Reply-To: jk87377@korppi.tut.fi (Kouhia Juhana Krister)
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Organization: Tampere University of Technology, Finland
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In article <5119@ethz.UUCP> visinfo@bernina.ethz.ch.UUCP (VISINFO c/o Peter Simeon) writes:
>
>Yes. Chris Weber has written a programm called LargeSoundPlayer which is able
>to play very long IFF Sound Files directly from hard drive with up to 29 khz
>sampling rate. The problem is sampling to hard disk. We made some 3.5 MB long
>files using 4 MB fast ram. Sampling directly to hard disk requires a buffer
>in the sampler itself, because it is impossible to sample and write to the
>hard drive at the same time.

How difficult it's make such kind of sampler (AD-converter) that uses
same technique like as Paula. I mean DMA technique.
Is such kind of card exist yet? (8 or 16 bits)

I asked a couple weeks ago if there is exists DAT interface card to
the Amiga. I think it needs only one dsp-prosessor (read Amigas
memory via DMA and send data to/from S/PDIF chips). Sony has a couple
chips which handle S/PDIF format: one for decoding and one for
encoding.
Is it possible read Amigas memory 2*2*44100 bytes per second via DMA?
(Stereo, 16 bit, and same time read data from harddisk.)

Of course, it's possible to connect S/PDIF connector to amplifier,
which has digital interface. Amplifier have AD/DA-converters, so,
there's no need to buy them separately. Amplifier costs less than
$1000 here, and in USA more less than here. Or am I right?


Juhana Kouhia
jk87377@tut.fi