[Dtb-talk] DTB Here and There

[T. Joseph Carter]

Late thanks for your late answer, Tim.  =)

I agree that 16.3 ips is pleasingly fast for a playback speed.  I 
wonder where I can get my hands on a sound card with 192 kHz sample 
rate or how to rig up a cassette player to spew tape at that speed 
(with "spew" being the precise thing you'd want to avoid, actually..)

Hm, I suspect I could come up with something that could deliver 8.15, 
which would give me 22.05 kHz for LOC cassettes, which would be just 
about as much audio fidelity as could be gotten out of them.

Anyway, thanks for the response, I have some ideas now for building a 
suitably ridiculous transfer machine.  ;)

Joseph


On Fri, Jan 22, 2010 at 10:06:43PM +0800, Tim Gillett wrote:
>Hi Joseph,
>
>A late answer to your technical question about the Graf Digitisers.
>Since I located the Digitisers on the www and suggested them to ABWA
> I can pass on to you some of their technical details.
>
>For 2 track tapes they use a stereo  soundcard capable of 192khz sample rate,
>and two such soundcards for 4 tracks.
>The tapes run at about 16.3 ips
>which translates to a sample rate of 22.05khz for 2 track and 11.025khz for LOC 4 track.
>So frequency response is  reasonable for speech material
>and considering the limitations of the cassette tapes themselves.
>
>The stereo version has a 4 track head installed and so can copy all 4 tracks in one pass.
>The mono version can copy both 'sides' of a 2 track tape also in one pass.
>
>All in all a good way to convert a lot of tapes in a hurry, but of course
>it falls short of the ideal for format conversion where the aim is
>not to compromise the original audio fidelity.
>
>Best wishes
>
>Tim Gillett
>Audio/Electronics Technician
>Perth, Western Australia
>
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