Re: OSRL Presents: A World Exclusive - SCAMP has arrived

[CUTblakeney@home.com (Jeff Blakeney)]

On 01 Dec 1999 06:28:22 GMT, supertimer@aol.com (Supertimer) wrote:

>Hi Jeff, I find Oversampler better than LongPlay in this regard,
>mainly because of oversampling but also because the play
>routine seems cleaner and you can set the file type/aux type
>to make Oversampler default to a playback rate of your
>choice.

Yes, I know that Oversampler is the better choice for playing back
samples.  I just wanted to correct the statement that Oversampler was
the ONLY program that could play long samples.

Actually, in the case of the two WAV files listed, I could have pretty
much any sound player to play these files as they would fit in RAM on
my machine.  Even in the Finder, which is a large program, I have
about 6.5 MB of free RAM.  :-)

>I wrote an article that I posted to csa2 about conversions of
>MP3 to the IIGS using a PC.

I'm still much happier listening to 44 kHz, 16 bit, stereo MP3s on my
Pentium II than listening to whatever frequency, 8 bit, mono sounds on
my IIgs.

>I suggest a higher sampling rate mono file instead.  11,025
>is really too low.

Yes, I meant to mention this but forgot.  You can either go for a
sample that is half the size and the same quality or the same size
with better quality.

>The HyperStudio manual gives a tip on the sampling
>rate to choose.  It says tha 26320Hz (or a multiple or
>half of this) results in the cleanest sounding playback
>because that's the frequency the power supply operates
>at so there is much less interference.  I do in fact,
>find this to be the case.

Don't take this as an absolute constant.  Variations in the values of
different components in the power supply will result in each power
supply operating at slightly different frequencies.  However, 26320 Hz
is probably the average frequency so is close enough to reduce the
amount of noise caused by the power supply.  There are probably other
harmonic frequencies that could be used successfully as well.

>Lastly, there's a shift in frequency balance between
>the IIGS audio and most PC sound cards.  That's why
>I suggest processing the wav file using the Goldwave
>program on the PC before taking it to the IIGS (and
>doing a reverse process with Goldwave if taking
>something digitized on a IIGS to a PC).  See the
>article I posted for more information.

The only real difference I can recall hearing between playing stuff on
my PC versus playing it on my IIgs is due to the fact that I'm not
running them both through the same amplifier or speakers.  I used to
and they both sounded about the same but now I'm running my PC sound
through an external amplifier and a pair of high power car speakers
mounted in wooden boxes and my IIgs is using the amplifier and
speakers in my Commodore 1084S RGB monitor.  The monitors speakers are
smaller and have much different frequency response giving me a lot
less low end not to mention the fact that I have the loudness (boosts
the bass) turned on on the external amplifier on my PC.

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