Re: [LAU] Record levels lower in Alsa than Jack

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.
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