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Re: [a little OT] File format for a bunch of floats
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Re: [a little OT] File format for a bunch of floats


  • Subject: Re: [a little OT] File format for a bunch of floats
  • From: Bob Lang <email@hidden>
  • Date: Wed, 22 Sep 2010 11:33:38 +0100

Hi

I wonder if this is a job for Audacity...

Bob
--
On 22 Sep 2010, at 11:30, Jerry wrote:

>
> On Sep 22, 2010, at 3:24 AM, Jerry wrote:
>
>> I have a _lot_ of audio files that have been generated by unusual means. They are 32-bit little endian floating point, one channel, with no header. I suppose this is some form of "raw." It's just a bunch of floats, all audio.
>>
>> I would like to be able to have them play by e.g. invoking QuickLook on them or other similar means such as within DEVONthink. I don't want to modify the file unless I absolutely have to, and then only by automatic means (no manually opening in an editor and saving in another format.
>>
>> I'm pretty sure this is a stupid question, but is there some file extension that I can add that will make the OS recognize them correctly?
>>
>> My fallback is to save one file as AIFF and see how much bigger the AIFF is than the raw--that is the header size and it is at the beginning. I can read out that number of bytes and stuff them in to the front of my file before I write out the floats, then add .aiff to the file name. I recall having done this in the past (manually, for a small number of files) and it worked for all similar AIFF files regardless of lengths.
>>
>> I know this isn't really a CoreAudio question but what better place to ask. 8^)
>>
>> On a related note, I used to have an OS9 utility that would tell me the header length of AIFF files. Is there a tool around that does this? Command line?
>>
>> Thanks,
>> Lance
>
> Responding to my own post...
> Is there a command line tool that I can use to convert this file format into another, more "OS-friendly," format? I'm on 10.5.
> Jerry
>
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References: 
 >[a little OT] File format for a bunch of floats (From: Jerry <email@hidden>)
 >Re: [a little OT] File format for a bunch of floats (From: Jerry <email@hidden>)

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