SoundForge audio; speeding up a voice file to record to MP3 and CDs

[JCJeski]

Simply put, can I use Sound Forge or some other program to speed up
and CD record voice lectures that I have recorded on a Sony Digital
Recorder, without re-recording these voice files at the speeded up
rate?

I have a Sony digital recorder that has "DPC" or digital pitch
control. This allows me to record a lecture and play it back at a
faster rate. Sony's DPC allows me to speed up the lecture 30 to 60%
during playback (playing back either on my computer, with Sony's
software, or via the recorder itself) which means I can listen to a 2
hour lecture in a much shorter time period.

I want to transfer speeded up recordings onto CDs and as MP3 files
onto my MP3 player.

Is there a way to do this with one of the audio editing programs out
there?
I'm thinking some version of SoundForge might have the DPC speeding up
software, since I believe SoundForge is Sony software.

I have not been able to obtain this information from the Sony website
so far. I've also tried to e-mail Sony, but they seem to assume I've
already bought SoundForge, and insist on knowing the serial number for
the software (I don't have it yet, but would consider buying it if it
has the DPC and speeding up capabilities for recording onto CDs and
MP3)

Please help, and a direct reply to me at would be
appreciated.

Thanks,

John

[DK]

Sound Forge will allow you to "Time Compress/Stretch" audio files.
I've been using SF for about 5 years now. My experience has been you
can compress (speed up) spoken word audio to about 75% or even a
little less of the original length without a lot of artifacting if you
have a strong signal and a clear speaker. SF has different algorithms
you can try to adjust the quality of the process. FWIW in case you
have a fast-talking lecturer someday, stretching (slowing down) spoken
word audio is much more challenging. If the source is recorded in a
rather "dead" room with little or no reverb, you will still be able to
make out what he/she is saying up to 115% or maybe even 120%. After
that, it'll probably get too choppy, like a plate reverb effect. If
your source was recorded in a lecture hall or auditorium with audible
echo, you'll probably only be able to go to 105% the original speed if
needed. Hope this helps.

- Dave K.

(JCJeski) wrote in message >...
> Simply put, can I use Sound Forge or some other program to speed up
> and CD record voice lectures that I have recorded on a Sony Digital
> Recorder, without re-recording these voice files at the speeded up
> rate?
>
> I have a Sony digital recorder that has "DPC" or digital pitch
> control. This allows me to record a lecture and play it back at a
> faster rate. Sony's DPC allows me to speed up the lecture 30 to 60%
> during playback (playing back either on my computer, with Sony's
> software, or via the recorder itself) which means I can listen to a 2
> hour lecture in a much shorter time period.
>
> I want to transfer speeded up recordings onto CDs and as MP3 files
> onto my MP3 player.
>
> Is there a way to do this with one of the audio editing programs out
> there?
> I'm thinking some version of SoundForge might have the DPC speeding up
> software, since I believe SoundForge is Sony software.
>
> I have not been able to obtain this information from the Sony website
> so far. I've also tried to e-mail Sony, but they seem to assume I've
> already bought SoundForge, and insist on knowing the serial number for
> the software (I don't have it yet, but would consider buying it if it
> has the DPC and speeding up capabilities for recording onto CDs and
> MP3)
>
> Please help, and a direct reply to me at would be
> appreciated.
>
> Thanks,
>
> John

[DK]

Sound Forge will allow you to "Time Compress/Stretch" audio files.
I've been using SF for about 5 years now. My experience has been you
can compress (speed up) spoken word audio to about 75% or even a
little less of the original length without a lot of artifacting if you
have a strong signal and a clear speaker. SF has different algorithms
you can try to adjust the quality of the process. FWIW in case you
have a fast-talking lecturer someday, stretching (slowing down) spoken
word audio is much more challenging. If the source is recorded in a
rather "dead" room with little or no reverb, you will still be able to
make out what he/she is saying up to 115% or maybe even 120%. After
that, it'll probably get too choppy, like a plate reverb effect. If
your source was recorded in a lecture hall or auditorium with audible
echo, you'll probably only be able to go to 105% the original speed if
needed. Hope this helps.

- Dave K.

(JCJeski) wrote in message >...
> Simply put, can I use Sound Forge or some other program to speed up
> and CD record voice lectures that I have recorded on a Sony Digital
> Recorder, without re-recording these voice files at the speeded up
> rate?
>
> I have a Sony digital recorder that has "DPC" or digital pitch
> control. This allows me to record a lecture and play it back at a
> faster rate. Sony's DPC allows me to speed up the lecture 30 to 60%
> during playback (playing back either on my computer, with Sony's
> software, or via the recorder itself) which means I can listen to a 2
> hour lecture in a much shorter time period.
>
> I want to transfer speeded up recordings onto CDs and as MP3 files
> onto my MP3 player.
>
> Is there a way to do this with one of the audio editing programs out
> there?
> I'm thinking some version of SoundForge might have the DPC speeding up
> software, since I believe SoundForge is Sony software.
>
> I have not been able to obtain this information from the Sony website
> so far. I've also tried to e-mail Sony, but they seem to assume I've
> already bought SoundForge, and insist on knowing the serial number for
> the software (I don't have it yet, but would consider buying it if it
> has the DPC and speeding up capabilities for recording onto CDs and
> MP3)
>
> Please help, and a direct reply to me at would be
> appreciated.
>
> Thanks,
>
> John