I recently recorded an event that lasted about 3 hours. The audio was
recorded into my computer via a Delta 1010 soundcard @ 24/96. I
increased the buffer size to improve performance because I didn't need
any output.

Anyhow, I direct monitored the recording the whole time, and watched the
screen to make sure it was writing audio right until the very end.
Everything looked great until I saved the project, and got everything
home. Now there is absolute silence after about 1:04:00. The entire 3
hour audio region is there, but I can't see or hear any audio after
1:04:00.

The file size is 6.07 GB, which leads me to believe that all the data is
there (3 hours in 24/96 stereo should be about 6GB)....but I have no
idea how to access it.....I'm using Win2k w/ NTFS.

The audio was also recorded along with video to mini-dv and DVD-R, but
of course it's chopped up onto several tapes/DVD's and is missing bits
and pieces, so I'd really like to recover the full 24/96 recording. When
I try to play the raw .wav in Winamp it says "the file is damaged." Any
ideas? Thanks a ton!

Jonny Durango

Try to change the extension of the file to something other than .wav.
Avoid extensions of other audio formats. Likely your audio editor
offers to load the data as raw data. If so, you'll have to specify
sample rate, bit depth, number of channels and byte ordering- if the
data is there, it will be loaded.

When data is loaded in this manner, it will have some digital peaks
here and there (file header, block markers) but this would at least
allow you to select blocks from the audio and export those back to
..wav.

Good luck,
Marc

By the way, you say that the file is about 3 hours long and 6 gigabyte,
and only 1 hour of it is loaded. That's roughly 2 gigabyte of data,
which rings a bell: That's the maximum file size that can be handled as
a 32-bit (signed) number. Many programs (not just audio software) will
tend to have trouble handling files that surpass these limits.

If any .WAV splitters are out there, you might consider cutting the
file up in 4 pieces with one of those, so that you stay within these
limits. Yet another option is trying to load the file with a program
that is advertised as being able to handle files of unlimited size.

Hope this helps,
Marc

wrote:
By the way, you say that the file is about 3 hours long and 6 gigabyte,
and only 1 hour of it is loaded. That's roughly 2 gigabyte of data,
which rings a bell: That's the maximum file size that can be handled as
a 32-bit (signed) number. Many programs (not just audio software) will
tend to have trouble handling files that surpass these limits.

If any .WAV splitters are out there, you might consider cutting the
file up in 4 pieces with one of those, so that you stay within these
limits. Yet another option is trying to load the file with a program
that is advertised as being able to handle files of unlimited size.

Hope this helps,
Marc


Thanks a ton! This is very helpful. I will try using a file splitter and
if that doesn't work I'll try to find an audio editor that will load
large files.....I might even be able to export everything up to 1:04:00,
then snip the region at that spot and see if Cubase will read the NEXT
1:04:00 and ignore the first portion or the .wav file entirely.

Thanks a million!

Jonny Durango

Jonny,
A file splitter will not ensure that your samples are aligned into
frames.
I have a DOS tool for this...
http://www.gidluckmastering.com/audiohck.zip

It takes an input wav file and outputs two files.
1) 2gb wav file.
2) balance of the audio.

If you take your 6gb file and run it through the program you will get a
2gb file and a 4gb file. Keep the 2gb file.

Run the 4gb file through the program again. In this step, you will get
(2) 2gb files, each of which will be importable into windows audio
apps.

It works with both 16 and 24-bit audio.

Gordon

On Mon, 22 Aug 2005 01:23:42 -0700, Jonny Durango
wrote:

I recently recorded an event that lasted about 3 hours. The audio was
recorded into my computer via a Delta 1010 soundcard @ 24/96. I
increased the buffer size to improve performance because I didn't need
any output.

What program did you record with? If it could create a 6GB file,
you'd hope it could play it?


Anyhow, I direct monitored the recording the whole time, and watched the
screen to make sure it was writing audio right until the very end.
Everything looked great until I saved the project, and got everything
home. Now there is absolute silence after about 1:04:00. The entire 3
hour audio region is there, but I can't see or hear any audio after
1:04:00.

Again - what program are we in?

What happens if you snip the first hour? Does the next chunk become
available? (Work on a copy, of course:-)

Can you select the whole region and process it? Like export it at a
lower sample rate? Do you now have access to more audio?

On Mon, 22 Aug 2005 12:17:28 +0100, Laurence Payne
wrote:

On Mon, 22 Aug 2005 01:23:42 -0700, Jonny Durango
wrote:

I recently recorded an event that lasted about 3 hours. The audio was
recorded into my computer via a Delta 1010 soundcard @ 24/96. I
increased the buffer size to improve performance because I didn't need
any output.

What program did you record with? If it could create a 6GB file,
you'd hope it could play it?

You'd hope, but I wouldn't bet on it. I can imagine a program that
would write a large file (because the OS lets it) but not read the
whole thing (because the programmer assumed the 32-bit file size
parameter in the .wav header is always correct).

I've got this idea that could have/should have been done years ago,
have a list of programs/versions that are
"greater-than-32-bit-file-size compatible." I see this problem posted
here on a regular basis, always for an important/desired recording.



Anyhow, I direct monitored the recording the whole time, and watched the
screen to make sure it was writing audio right until the very end.
Everything looked great until I saved the project, and got everything
home. Now there is absolute silence after about 1:04:00. The entire 3
hour audio region is there, but I can't see or hear any audio after
1:04:00.

Again - what program are we in?

What happens if you snip the first hour? Does the next chunk become
available? (Work on a copy, of course:-)

Can you select the whole region and process it? Like export it at a
lower sample rate? Do you now have access to more audio?

-----
http://www.mindspring.com/~benbradley

Laurence Payne wrote:
What program did you record with? If it could create a 6GB file,
you'd hope it could play it?


Cubase SX 2.2.something ....I will try chopping it up with a .wav
splitter. I believe Cubase operates the same way as ProTools, in that
splitting up an audio region does not affect the actual .wav file in any
way, but only tells the project file where to start and stop playing
back audio. Thanks a ton for the advice, Laurence and Ben....I'll let
you know how it goes.

Jonny Durango

In article writes:

....I will try chopping it up with a .wav
splitter. I believe Cubase operates the same way as ProTools, in that
splitting up an audio region does not affect the actual .wav file in any
way, but only tells the project file where to start and stop playing
back audio.


That's correct. So when you chop up the file, you'll have to create a
new project and import the pieces into it. If you're lucky (or the
software works exactly as it should) the file will be split so that if
you butt the pieces together end to end you won't even lose a sample.
But if the splitting program that you use allows you to listen to the
audio (which would necessarily mean that it would have to be able to
play the file) to determine the split point, pick some point where an
edit won't be audible, like the pause between a song introduction and
the count-off.


--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo

On 22 Aug 2005 18:03:33 -0400, (Mike Rivers)
wrote:


That's correct. So when you chop up the file, you'll have to create a
new project and import the pieces into it.

You should stay in the same Project. Export Audio in Cubase has the
option to place the result on a new track. If the long track WILL
export in 1-hour chunks, they'll end up on separate tracks, in
position. All you then need to do is discard the original.

On Mon, 22 Aug 2005 12:05:53 -0700, Jonny Durango
wrote:

Cubase SX 2.2.something ....I will try chopping it up with a .wav
splitter. I believe Cubase operates the same way as ProTools, in that
splitting up an audio region does not affect the actual .wav file in any
way, but only tells the project file where to start and stop playing
back audio. Thanks a ton for the advice, Laurence and Ben....I'll let
you know how it goes.

In Cubase, set the locators round e.g. the second hour and Export
Audio.