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Re: [ARSCLIST] 2GB limit for audio file formats



Peter,

Thanks for the quick response to this. In fact what you suggest was the
first solution that was offered here, and it turns out the disc is HFS+, so
that wasn't the problem. Then, by asking Peak directly and browsing their
user forums I discovered that in fact AIFF, WAV, and Sound Designer file
formats were standardized as 32-bit files, so there was an acknowledged 2GB
limit to all of these (technically it should be 4GB, but there was some
question about whether one of the bits is reserved for the sign, even
though all file locations should be positive numbers - might be that -1
needed to be reserved as a value in order to flag something). WAV64 and
other files that exceed this limit are not industry standards, so Peak
doesn't support them.

Alec

At 01:04 PM 6/24/2005, you wrote:
Hi

There is no inherent limit to file size in any of the audio file formats,
the limit you are seeing is that of the file system on the computer you are
using.
Make sure the disc(s) you are recording onto is/are formatted as HFS+ not
HFS.
Likewise on a PC make sure your disc is formatted as NTFS not FAT32 or you
will encounter the same problem
It is just possible you are using a very old version of Peak that has this
limit built in, (I am not familiar with Peak version numbering) but I would
not expect this to be the case for late versions of the software.

HTH

-pm

-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:ARSCLIST@xxxxxxx] On Behalf Of Alec McLane
Sent: Fri 24 Jun 2005 17:33
To: ARSCLIST@xxxxxxxxxxxx
Subject: [ARSCLIST] 2GB limit for audio file formats


We are recording (mostly) analog tapes to disk at a sampling rate of 88.2KHz and 24-bit resolution, using Peak 4.0 on a G5 running OS 10.3.5. While the files are for archival purposes, to make listening copies of these recordings we bump them down to 44.1KHz to burn to CD. For the archival files, however, we are encountering the 2GB limit for 32-bit audio file formats, which at that resolution only allows around 65-70 min. of music. I'm told this is a limit built into the standards for most audio files - WAV, AIFF, Sound Designer, etc., established by Microsoft, Apple, and Digidesign, respectively.

While this is enough to record, say, one side of a cassette tape, it may not
be enough for a 10" reel at 3 3/4 ips, nor is it enough for those few
occasions when we record from 95- or 125-min DATs. The virtue of Peak 4.0 is
that it allows burning a "playlist" to CD from regions defined within a
single file, and doesn't require the saving of smaller files in order to
make a CD from the recording. But it has the disadvantage of just stopping
the recording at the 2GB limit, without at least opening up a new file to
continue, so many recordings get truncated and we have to figure out where
it stopped and begin a new file manually.

In addition to the recording problem, the idea of storing a complete tape,
or at least a side of a tape, as a single file in archival-quality format on
a server is appealing, just for its simplicity. So even recording separate
files and then merging them within Peak just to burn a CD is still not an
ideal solution, although for the time being it seems the only one.

Has anyone else found solutions to this problem with other software?

Alec McLane


------------------------------------------------------------------------ Alec McLane Scores & Recordings/ World Music Archives Phone: (860) 685-3899 Olin Library Fax: (860) 685-2661 Wesleyan University mailto:amclane@xxxxxxxxxxxx Middletown, CT 06459 http://www.wesleyan.edu/libr/srhome/srdir.htm

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------------------------------------------------------------------------ Alec McLane Scores & Recordings/ World Music Archives Phone: (860) 685-3899 Olin Library Fax: (860) 685-2661 Wesleyan University mailto:amclane@xxxxxxxxxxxx Middletown, CT 06459 http://www.wesleyan.edu/libr/srhome/srdir.htm


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