[LAU] Record levels lower in Alsa than Jack

[John Murphy]

On Fri, 6 Nov 2020 15:19:22 -0600 "Chris Caudle" wrote:

> What does sndfile-info show about t1w64.w64 and t2wav.wav files?  I tried
> using sox to convert a float file I had in an Ardour project directory to
> PCM, and sndfile-info reported the exact same maximum value for both.
> Using the sox stat effect also displayed the same maximum and minimum for
> original and converted file as well, but sndfile-info might give you some
> insight into why sox did not seem to show the same value.

Side by side for easy comparison:

File : t1w64.w64                                  t2wav.wav
Length : 3840136                                  1920044
riff : 3840136                                    1920036
wave
 fmt : 40                                         16
  Format        : 0x3 => WAVE_FORMAT_IEEE_FLOAT   0x1 => WAVE_FORMAT_PCM
  Channels      : 2                               2
  Sample Rate   : 48000                           48000
  Block Align   : 8                               4
  Bit Width     : 32                              16
  Bytes/sec     : 384000                          192000
fact : 32
  frames : 480000
data : 3840024
                                                  End
-----------------------------------------------------------------------
Sample Rate : 48000                               48000   
Frames      : 480000                              480000
Channels    : 2                                   2
Format      : 0x000B0006                          0x00010002
Sections    : 1                                   1
Seekable    : TRUE                                TRUE
Duration    : 00:00:10.000                        00:00:10.000
Signal Max  : 0.584686 (-4.66 dB)                 32767 (-0.00 dB)

That last 'Signal Max' comparison does seem to confirm that
normalisation has occurred.

-- 
Thanks again,
John.