AIFF File Info for Node.JS

A lightweight module that parses AIFF information data from a AIFF file into a Javascript Object. Basically retrieves file and header meta data information from a AIFF file. Now with support for AIFC files

Used for:

• Determining the validity of a .aif file
• Detecting the bit depth / bit rate / bits per sample of a .aif file
• Detecting the Sample Rate of a .aif file
• Detecting the number of channels in a .aif file
• Retrieving the file information, including file size, created date etc

Usage

npm install aiff-file-info --save

var wavFileInfo = require('aiff-file-info');

wavFileInfo.infoByFilename('./test.aif', function(err, info){
  if (err) throw err;
  console.log(info);
});

if err is not null, the AIFF file is valid.

Result

{ header:
   { form_identifier: 'FORM',
     chunk_size: 1462318,
     aiff_identifier: 'AIFF',
     comm_identifier: 'COMM',
     chunk_length: 18,
     num_channels: 1,
     num_sample_frames: 487424,
     bits_per_sample: 24,
     sample_rate: 96000 },
  stats:
   { dev: 16777220,
     mode: 33188,
     nlink: 1,
     uid: 501,
     gid: 20,
     rdev: 0,
     blksize: 4096,
     ino: 103575654,
     size: 1462326,
     blocks: 2864,
     atime: Thu Jan 28 2016 18:28:43 GMT-0700 (MST),
     mtime: Thu Jan 28 2016 15:52:09 GMT-0700 (MST),
     ctime: Thu Jan 28 2016 15:52:09 GMT-0700 (MST),
     birthtime: Thu Jan 28 2016 15:52:01 GMT-0700 (MST) },
  duration: 5.077493055555555 }

Example errors

{ error: true,
  invalid_reasons: [ 'Expected "AIFF" string', 'Expected "COMM" string' ]
}

Duration is in seconds. Stats come from Node raw fs.statSync() result.

References:

TODO: Deep scan [avg amplitude, max amplitude]

Resources used: AIFF (Audio Interchange File Format) / AIF file information helper

http://www-mmsp.ece.mcgill.ca/documents/audioformats/aiff/Docs/AIFF-C.9.26.91.pdf https://cycling74.com/forums/topic/aiffs-80-bit-sample-rate-value/

http://www.instructables.com/id/How-to-Read-aiff-Files-using-C/

http://www.muratnkonar.com/aiff/

http://www-mmsp.ece.mcgill.ca/documents/audioformats/aiff/aiff.html

http://aifftools.sourceforge.net/libaiff/#aiff

http://download.banshee.fm/taglib-sharp/2.1.0.0/

http://www.muratnkonar.com/aiff/

MIME http://www.digitalpreservation.gov/formats/fdd/fdd000005.shtml

http://web.mit.edu/jhawk/mnt/spo/gnome/old-and-dead/src/gnome-1.0/audiofile-0.1.6/libaudiofile/aiff.c

https://github.com/taglib/taglib/tree/master/taglib/riff/aiff

https://godoc.org/github.com/mattetti/audio/aiff

http://www.cs.columbia.edu/~hgs/software/tsip/tel-sip/aiff.c