[LAD] How do I write meta data into a wave file? (Command line tools?)

[Nils Gey]

Hello list,

libsndfile-info shows various useful information like the one at the end of this mail.
I have Sonatina Symphonic Orchestra waves here (violins 1) and a one note wave includes "Midi Note", "Loop Count" and "Cue Start : 92078  End : 223977", which is the actual loop start/end

Is this custom data or does it follow a standard?
And no matter what, how do I write that into my own wave files?

I would prefer command line tools. But programming interfaces are fine as well.

Greetings,
Nils

$ sndfile-info test.wav 

Version : libsndfile-1.0.25

========================================
File : test.wav
Length : 896548
RIFF : 896540
WAVE
fmt  : 16
  Format        : 0x1 => WAVE_FORMAT_PCM
  Channels      : 2
  Sample Rate   : 44100
  Block Align   : 4
  Bit Width     : 16
  Bytes/sec     : 176400
data : 895916
*** SAUR : 512 (unknown marker)
smpl : 60
  Manufacturer : 0
  Product      : 0
  Period       : 22675 nsec
  Midi Note    : 76
  Pitch Fract. : 0
  SMPTE Format : 0
  SMPTE Offset : 00:00:00 00
  Loop Count   : 1
    Cue ID :  0  Type :  0  Start : 92078  End : 223977  Fraction :     0  Count :     0
  Sampler Data : 0
End

----------------------------------------
Sample Rate : 44100
Frames      : 223979
Channels    : 2
Format      : 0x00010002
Sections    : 1
Seekable    : TRUE
Duration    : 00:00:05.079
Signal Max  : 31468 (-0.35 dB)