Re: Sound question

[mjmahon@aol.com (Michael J. Mahon)]

Jeff Blakeney wrote:

>Converting to WAV will work but you have to make sure you convert it
>to an 8 bit mono WAV file.  The only program for the IIgs that will
>play stereo WAV files in stereo is a hack I threw together to show
>that Oversampler didn't playback in stereo and believe me, you don't
>want to try playing back with it because it requires the entire sample
>be loaded into memory and it can take up to 30 minutes to load a large
>sample. :)

I can't help but wonder what the sample size/RAM size was for a
30 minute load time!  A Hi-speed SCSI card can DMA data at a
good fraction of a megabyte per second, and a IIgs can't handle
more than 8MB, so how could loading up memory possibly take
more than 10-30 seconds?

If you were talking about loading from floppies, then I understand--
but certainly no one considering playing extended sound samples
would use less than a hard disk.  Storage capacity alone would
make the decision.

I appreciate the info that "Oversampler" (I didn't recall its name)
only plays mono, but 22.050KHz 8-bit mono sounds pretty good
to most people.  And if it's the program I'm thinking about, it plays
while reading from disk, so memory size is not a limiter.

For that matter, if AM radio fidelity doesn't bother you too much,
then you can go to 11.025KHz and cut the music files in half.
(BTW, any downsampling should be preceeded by digital filtering
to eliminate distortions from aliased high frequencies.)

-michael

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