[Dtb-talk] digitizing 4-track recordings

[Greg Kearney]

Of course having the recoding done in digital form to begin with is  
the best solution. But I'm trying to convert a tape only recording to  
DAISY format. As I said in my first post I'm using a Macintosh  
computer, Sound studio software and my own DAISY production tools.

Greg Kearney
On Dec 28, 2006, at 16:20 , Peter Donahue wrote:

> Hello Aaron and everyone,
>
>     While I hesitated to post this as it's a, "Gray area" where this  
> list is
> concerned perhaps it's related in that some of us are interested in
> digitizing books and other material recorded on 4-track cassettes to  
> create
> DAISY books, or for some other use. I'd be curious to hear what some  
> of you
> do to improve the audio quality of books digitized from an analog  
> source
> such as books recorded at half speed and made available on 4-track  
> cassette.
> Is it better to produce a digital rendering from books recorded on 2- 
> tracks
> and played at1 and 7.8 IPS, or are there ways to improve the quality  
> of
> material digitized directly from 4-track cassette recordings? Am I  
> better
> off to use a digital workstation for making the initial digital  
> masters, or
> can I do this just as easily with a digital/audio processing program  
> like
> Sound Forge? What settings do you recommend for both options. I'm  
> planning
> to get a digital/audio workstation in the next few months so will  
> have a
> mixer at my disposal to assist in this process and for other uses.
>
>     Thanks for your feedback. Your suggestions will be very much
> appreciated.
>
> Peter Donahue
>
>
> From: "Aaron Cannon" <cannona at fireantproductions.com>
> To: "Discussion of Digital Talking Books" <dtb-talk at nfbnet.org>
> Sent: Thursday, December 28, 2006 4:35 PM
> Subject: Re: [Dtb-talk] Converting tone indexed books to DAISY
>
>
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> While you are correct, that doesn't fit the current issue.  We aren't
> recording and playing back at high speeds, we are playing back at  
> high speed
> something that was recorded at a slow speed.  Nevertheless, you are  
> correct
> that theoretically it shouldn't matter how fast we play it back.   
> However,
> we are using noncommercial equipment and it probably can't faithfully
> reproduce the audio, especially when we're talking about frequencies  
> which
> are beyond those normally heard by humans.
>
> Every time we double the speed, we double the frequency, hence half  
> of our
> bandwidth is lost.  It might be worth trying to record at 96KHZ while
> playing at 4x speed, but my guess is that the problem isn't in the  
> recorder,
> but rather in the player being able to reproduce frequencies 4 times  
> those
> for which it was designed.  It's just my guess though, the problem  
> may be
> somewhere else entirely.
>
>
> Aaron Cannon
>
>
> - --
> Skype: cannona
> MSN/Windows Messenger: cannona at hotmail.com (don't send email to the  
> hotmail
> address.)
> - ----- Original Message -----
> From: <DanFlasar at aol.com>
> To: <dtb-talk at nfbnet.org>
> Sent: Thursday, December 28, 2006 2:52 PM
> Subject: Re: [Dtb-talk] Converting tone indexed books to DAISY
>
>
>> Actually, there is no reason to assume that copying at  high speed  
>> makes
>> any
>> difference in quality.  In the days of reel-to-reel  recording, the  
>> slower
>> speeds offered the least quality, probably because you had  less
>> 'granularity' on
>> the tape.  Hence the faster speeds offered the best  reproduction.   
>> I'm
>> sure
>> there has to be a limit to the speed but industrial  recording  
>> dupers run
>> at
>> very high speeds indeed and the quality is fine.
>> Dan
>>
>
>
> -  
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