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Re: Scanning (Was: Re: [OM] HCB - OM eqivalent to Leica M + 35/2?)

Subject: Re: Scanning (Was: Re: [OM] HCB - OM eqivalent to Leica M + 35/2?)
From: Denton Taylor <denton@xxxxxxxx>
Date: Thu, 13 Aug 1998 08:24:31 -0400
>>Surely the sampling rate is that which the sampler samples (asks for
information from the player of music), while the hearing frequency is that
of the sound, i.e. different things.>>

I'm no scientist, but it has something to do with the following (Ken, help!)

The theoretical limit of human hearing in the high frequency range is say
20,000-22,000 hz. Therefore under Nyquist theoretically in order to capture
all information in this upper range, which is in analog wave form, the wave
must be sampled twice.

However, Nyquist or no, it has become clear that 44khz is not sufficient to
capture all the harmonic information of a musical recording, which is way a
suprising amount of music is recorded to 2" analog tape, and why records
sound better than CDs. In the near future it appears the sampling rate
might be bumped up to 96khz (requiring the purchase of new CD players,
etc.) Perhaps that will be sufficient to finally capture true musical sound.

To bring it back to photography, I'm not familiar of any application,
whether inkjet or commercial printing process, that would require an output
file of greater than 300dpi.

That's ouput, not input! To enlarge a slide to 8x10, scan it in at the
highest res your scanner will support and reduce it later.



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