Re: [SoX-users] Key freq of music samples

[Fmiser <fm...@gm...>]

> Hendrikus Godvliet wrote:

> I have a question about how to find the key of a music samples?
> We like to retune music to 432Hz.
> This works with the sox pitch -31  when its in 440Hz it lowers
> the pitch 8Hz to 432Hz.
> 
> But what when the samples aren't 440Hz but for example 441Hz
> ore 439Hz?
> 
> We need to know what is the basic freq of the music samples.

Wow.  That's a tall order. *smile*

SoX is amazing - but I don't think any of it's tools will help
in this case.

Any chance each music sample also includes a tuning note?

Does this need to be a hands-off automated script? If not, there
is a GUI tool called "baudline" that may help. Position the
cursor on one note and it can tell you the fundamental frequency.

If there are multiple notes sounding at one time, or you want a
automated script, I think you are out of luck.  This is where
the human ear/brain is unrivaled.  It's ability to process
selected portions within a music passage is amazing.  Maybe you
could have an adjustable tone generator that a human matches to
the music and then measure the tone.

--  Philip