linuxaudio.org

Atte André Jensen wrote:
> On 07/31/2011 10:30 PM, Erik de Castro Lopo wrote:

quoted text
>

> > Would I be able to get a copy of those two files (assuming they're

> > small)? Or at least send me the sndfile-info output on bot files?

>

> I just sent them to you, offlist...

Thanks.
The one that you say is:
   RIFF (little-endian) data, WAVE audio, mono 44100 Hz
is a plain WAV file that conforms to the original WAV spec. sndfile-info

says:
    File : m.wav

    Length : 93164

    RIFF : 93156

    WAVE

    fmt  : 16

      Format        : 0x1 => WAVE_FORMAT_PCM

      Channels      : 1

      Sample Rate   : 44100

      Block Align   : 2

      Bit Width     : 16

      Bytes/sec     : 88200

    data : 93120
This one on the other hand:
    RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 44100 Hz
conforms to a more recent spec and uses Microsoft's WAVE_FORMAT_EXTENSIBLE

layout. sndfile-info says:
    File : f.wav

    Length : 992330

    RIFF : 992322

    WAVE

    fmt  : 40

      Format        : 0xFFFE => WAVE_FORMAT_EXTENSIBLE

      Channels      : 1

      Sample Rate   : 44100

      Block Align   : 3

      Bit Width     : 24

      Bytes/sec     : 132300

      Valid Bits    : 24

      Channel Mask  : 0x4

      Subformat

        esf_field1 : 0x1

        esf_field2 : 0x0

        esf_field3 : 0x10

        esf_field4 : 0x80 0x0 0x0 0xAA 0x0 0x38 0x9B 0x71

        format : pcm

    fact : 4

      frames  : 330750

    data : 992250
If you wish to generate one of these using libsndfile, use the SF_FORMAT_WAVEX

subformat instead of SF_FORMAT_WAV.
HTH,

Erik

--

----------------------------------------------------------------------

Erik de Castro Lopo

http://www.mega-nerd.com/

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