Re: [SoX-users] DAT file documentation

[Robert D. <man...@gm...>]

I have a related but really simple question: What do the normalized
second and third column sample values refer to? Amplitude? I'm trying
to map notes to colors.

On Nov 22, 2011, at 7:07 AM, Jan Stary <ha...@st...> wrote:

> On Nov 22 07:34:51, jim Schimpf wrote:
>> Hi,
>>
>>    In the SOX documents it says the DAT file is text file of the signal data with the first line being a single value of sample rate and subsequent lines being time and the the wave value scaled from -1 to 1.
>>
>>    When I make a file like this SOX says it cannot find the sample rate,
>>
>> 8000                <-- Sample rate
>> 0 0                    <-- First time & sample
>> 0.000125 0.105667    <-- Next?
>>    :
>>
>>
>> instead if I make it of the form: (which matches the output created by having sox output a DAT file)
>>
>> ; Sample Rate 8000
>> ; Channels 1
>> 0 0
>> 0.000125 0.105667
>>    :
>>
>> then it works just fine.
>>
>> Did I miss something or should the documentation be amended ?
>
>
> This git patch still needs to be edited to include the
>
>    ; Sample Rate 48000
>    ; Channels 2
>
> lines; I never got around to learning the man syntax
> properly, so please someone finish this.
>
>    Jan
>
>
> ---
> soxformat.7 |    8 +++++---
> 1 files changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/soxformat.7 b/soxformat.7
> index c1d2513..c6a7593 100644
> --- a/soxformat.7
> +++ b/soxformat.7
> @@ -284,9 +284,11 @@ be used with any bit-rate.  E.g.
> Text Data files.
> These files contain a textual representation of the
> sample data.  There is one line at the beginning
> -that contains the sample rate.  Subsequent lines
> -contain two numeric data items: the time since
> -the beginning of the first sample and the sample value.
> +that contains the sample rate, and one line that
> +contains the number of channels. Subsequent lines
> +contain two or more numeric data items: the time since
> +the beginning of the first sample and the sample value
> +for each channel.
> Values are normalized so that the maximum and minimum
> are 1 and \-1.  This file format can be used to
> create data files for external programs such as
> --
> 1.7.6
>
>
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