[PD] change sample rate from patch and learn sample rate from file

[Roman Haefeli]

On Fre, 2013-02-01 at 02:58 -0200, Alexandre Torres Porres wrote:
> Hi there, I see now you can easliy change pd's sample rate from
> preferences while the patches are running, this is a new thing, isn't
> it?

Oh, I never tried to change the sampling rate while Pd is running.
Interesting. Thanks for bringing it up!

> anyway, can you change the sample rate from patch via messages?

It seems so, yes. Actually, you can intercept the settings you configure
to the audio dialog simply with a:

[r pd]
|
[print]

Those same messages can be sent to [s pd] in order to change audio
settings. 

When hitting apply, I get:

audio-dialog 0 0 0 0 2 0 0 0 0 0 0 0 2 0 0 0 48000 25 -1 64

(To guess which parameter represents the sampling rate is left to the
reader ;-)

> And also, can you learn, somehow, the sample rate from a sound file?
> Other softwares seem to do that easily, is there an object in Pd for
> that? Noy in vanilla I believe, right?

[iemlib/soundfile_info]

(works for WAV files)

Roman