Print

Print


Hugh,

In the double speed process, the tape is played back at double speed, but
the recorder also samples at double speed, such that when the recording is
played back at the normal sample rate, the audio plays back at its original
correct speed, so speed and formants are unchanged.

Due to the high speed playback, there is some minor loss of fidelity, and
also some minor EQ issues, but for speech, these are often welcomed
tradeoffs for the reduced transfer time.

Ellis Burman


On Thu, Mar 13, 2014 at 3:48 PM, Hugh Paterson III
<[log in to unmask]>wrote:

> @Tom,
>
> You say that it would be fine for spoken work or oral histories. I am not
> familiar with the process of double speed, but how will it not mess with
> the frequencies and formants of things like vowels?
> (speaking as a phonetician and linguist here.)
>
> - hugh paterson
>
>
> On Mar 13, 2014, at 3:18 PM, Tom Fine wrote:
>
> > Hi Andrew:
> >
> > Any of the several "porta-studio" type machines from Tascam, Fostex,
> Yamaha and maybe others could do 4 tracks at once. I think Richard Hess has
> said the track configuration is slightly different from Norelco Standard,
> but it would probably be fine for low-fidelity content like spoken-word.
> Tascam also made a 4-track front-loading deck. I think most of these decks
> had dbxII NR instead of Dolby B or C.
> >
> > For low-fi material, another advantage is that these decks almost all
> ran at both 1 7/8 and 3.75 IPS, so you could do whole-tape double-speed
> ingestion. That would definitely screw up the audio with anything high
> quality, but it would be fine for stuff like oral histories.
> >
> > -- Tom Fine
> >
> > ----- Original Message ----- From: "Andrew Dapuzzo" <
> [log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Thursday, March 13, 2014 4:59 PM
> > Subject: Re: [ARSCLIST] Need use of 4-track stereo tape deck/monaural
> output for digitization project
> >
> >
> >> Does anyone know if the same possibility exists for cassettes?
> >>
> >> machines that "could reproduce 4 tracks at once, which would speed up
> the
> >> digitization project. You'll need to reverse the two backwards
> channels" in
> >> the DAW?
> >>
> >> When we duplicated prerecorded music cassettes we recorded them this way
> >> but I am unaware of a playback machine that could playback all four at
> >> once.  I assume they don't exist but .....
> >>
> >> Thanks
> >> Andrew Dapuzzo
> >> Sony DADC
> >>
> >>
> >> On Thu, Mar 13, 2014 at 3:55 PM, Richard L. Hess
> >> <[log in to unmask]>wrote:
> >>
> >>> Hi, Lise,
> >>>
> >>> Some of the Teac and Sony machines could reproduce 4 tracks at once,
> which
> >>> would speed up the digitization project. You'll need to reverse the two
> >>> backwards channels in your DAW software.
> >>>
> >>> If you are willing to play back single channels and move connectors,
> >>> almost any 1/4-track recorder from "back in the day" could do this for
> you
> >>> as long as it has a 3.75 in/s speed.
> >>>
> >>> For the Tandberg, you might contact Terrysrubberrollers.com -- he
> rebuilds
> >>> the part, but I don't think he fixes machines.
> >>>
> >>> Of course, there are several of us who could do this for you--on much
> >>> better machines than the Tandberg, but I fear that the price is high.
> >>>
> >>> Cheers,
> >>>
> >>> Richard
> >>>
> >>>
> >>>
> >>>
> >>> On 2014-03-13 2:30 PM, Lise Menn wrote:
> >>>
> >>>> Hello, I am a new member of this list and totally naive about how to
> use
> >>>> your collective knowledge so I hope you'll be patient with me and ask
> for
> >>>> additional information if you think you can help me.
> >>>> I have about 60 remaining hours of audiotapes made in the 1970's on a
> >>>> Tandberg Model 12 which can no longer be repaired (at least not here
> in
> >>>> Boulder CO), apparently because its rubber parts have degenerated.
> >>>> To save money when I was a student, I recorded the four tracks
> monaurally
> >>>> at 3 3/4 ips, so that I could get 4 hours of speech recording per
> reel.  I
> >>>> started digitizing the tapes gradually a few years ago but when I was
> about
> >>>> 1/3 thru the job, the Tandberg stopped being repairable.  The
> contents of
> >>>> the tapes are worth preserving for research in language development;
> I will
> >>>> donate the digitized versions to the CHILDES archive at Carnegie
> Mellon.
> >>>> Is there a similar working Tandberg someplace that I could visit for a
> >>>> week or so and use to complete this job?  Is there some other 4-track
> >>>> machine that will permit monaural playback? Is there someone who
> knows how
> >>>> to machine new parts for my old tape deck?  Any other ideas?  Please
> help,
> >>>> and thank you.
> >>>> Lise
> >>>>
> >>>>
> >>>> Lise Menn                      Home Office: 303-444-4274
> >>>> 1625 Mariposa Ave
> >>>> Boulder CO 80302
> >>>> home page:   http://spot.colorado.edu/~menn/
> >>>>
> >>>> Professor Emerita of Linguistics
> >>>> Fellow, Institute of Cognitive Science
> >>>> University of  Colorado
> >>>>
> >>>> Fellow, Linguistic Society of America
> >>>>
> >>>> -- Richard L. Hess                   email:
> [log in to unmask], Ontario, Canada 647
> >>> 479 2800 http://www.richardhess.com/tape/contact.htm Quality tape
> >>> transfers -- even from hard-to-play tapes.
> >>>
> >>
>



-- 
Ellis
[log in to unmask]
818-846-5525