OK Joe here is what I am doing.
1. I take a NLS book and record it at 2x speed into a aiff file
2. I then look for the tattle tail mark of the tone index and mark
them off
3. I then break the recording apart on the marks.
4. I then use these as breaks for the DAISY version.
I also so some filtering on the file to eliminate the tape his and so
on.
Greg
On Dec 28, 2006, at 08:43 , Kafka's Daytime wrote:
Hi Greg,
I built a system for one of the libraries that did/does automated
conversion of taped audiobooks to digital. To speed the process
significantly, we custom-modified tape machines to play at higher
speeds and then pitch-shifted the digitally recorded audio to return
to normal speed. I don't recall what the threshold was, but you have
to find a happy balance between speed going in (and resulting
bandwidth loss) and artifacts resulting from pitch-shifting (i.e. if
you go in too fast your audio will get mangled in a too-dramatic
pitch shift and bandwidth loss will be too great).
For a home version, you might be able to use one of the Marantz tape
players (or Narrator model or similar) to play taped audio in at
higher speed - into Audalyze, for instance - and then apply pitch
shift to slow audio down.
Ripping at Fast Forward speed will not work as all of the audio's
frequency information gets mangled when played at Fast Forward and
the Fast Forward speeds will generally be too fast i.e. the factor
of pitch shift required and bandwidth lost will be too great.
There is more information in the patent abstract if you care to
search USPTO.gov for patent number 6,710,955.
Hope that helps,
Joe
On Dec 28, 2006, at 9:42 AM, Greg Kearney wrote:
While we're on this topic I would like to know if there is a way to
rip tapes at fast forward speed and then slow them dow to normal
speed in the computer. This would speed up the process of ripping
taped books as you would not have to play them into the sound
recoding software at the normal speed.
Greg Kearney
On Dec 27, 2006, at 22:19 , louie wrote:
Also you can rip NLS tapes using sound studio.
On Dec 27, 2006, at 9:03 PM, Cheryl Homiak wrote:
Our local libraries here in Madison have a lot more on cassette
than on cd as far as books and quite a few of them are abridged,
which I hate. but for books which are available this certainly
works and in fact, with a line-in setup and audio hijack pro it
isn't really difficult to make files of cassettes either.
--
Cheryl
"Where your treasure is, there will your heart be also."
