RE: Converting/Playing WAV files

From: COPLIN, Nicholas. (
Date: 2000-05-18 03:13:58

Hi all, (sorry for late reply but my email server was down 11/5 - 17/5)
thanks for the info Marko, could you explain how though I would play the
4bit sample? I just don't know enough about the SID - I can program notes..
but digital sounds?  Is it just a case of volume modulation?

- Nick

> -----Original Message-----
> From:	Marko Mäkelä []
> Sent:	Wednesday, 10 May 2000 15:21
> To:
> Subject:	Re: Converting/Playing WAV files
> On Wed, 10 May 2000, COPLIN, Nicholas. wrote:
> > Can any one recommend a PC tool to convert WAV sound files into
> digitised
> > sound samples for the C64.
> As far as I know, the WAV format consists of uncompressed raw audio
> samples.  There may be different variants of it (8-bit, 16-bit, mono,
> stereo); you should maybe experiment a little, or get some WAV
> documentation from somewhere.
> A long time ago, I made a few experiments.  I just took the 4 most
> significant bits of each WAV sample, and packed two of them in a byte. I
> wrote a simple player that played these at a constant speed in a busy
> loop.  You probably should use some kind of RLE compression to save space,
> and you may want to scale the samples.  For instance, if the WAV file
> appears to use slightly more than 13 bits, you would multiply the samples
> by 6 or 7 to move the signal to the most significant bits.
> BTW, I remember reading about a MOD player for the C128 (I think it was
> MOD).  Does anyone know anything about this?
> 	Marko
> -
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