[Scilab-users] Accessing sound device using java api from scilab

[Samuel Gougeon]

Hello Antoine,

Le 30/10/2019 à 10:14, Antoine Monmayrant a écrit :
> Hi all,
>
> For a small demo project, I am trying to show both the temporal signal and the spectrum of the sound recorded by the microphone of my laptop.
> I managed to hack together a proof of principle that relies on the linux command "arecord" and uses "unix_g" scilab function.
> I would be happy to go for a more portable way of recording the sound from scilab.
> I know there is a java api for sound: As anyone here ever worked with it or tried to call it from scilab?
>
> I've never tried to call a java api from within scilab.
> If you have any ressource and/or tutorial on the sound java api or on calling a java api from scilab, it would be of great help.


FYI : i am currently supervising a students project about this, for the 
whole academic year.
I submitted this project planning to enhance and extend Scilab sound 
capabilities, and it
was actually assigned to a group of 5 students in School of engineering.

Implementing a sound recorder through the standard microphone is one of 
the addressed topics.
It is set as a priority for the mid-term evaluation of the project, in 
january.
The priority is also to get a fully portable solution, and without C/C++ 
code and compilation
using any Scilab API, that would require to be reviewed and recompiled 
for each new Scilab 6.x release.
We know how this makes external modules quickly obsolete and unusable.
On this aspect, porting the portaudio and sndfile modules to Scilab 6 
has been considered.
But after being assessed, it looks too hard to do. BTW, it would not 
remedy to the need to
recompile. So, it is not a priority of the project.

Using Java in open source projects requires more care today than one 
year ago, due to
major changes in Oracle Licenses policy since early 2019. But java is 
still a first way to be
explored, indeed.
Scilab help pages of JIMS have nice examples to start using the JVM from 
Scilab:
https://help.scilab.org/docs/6.0.2/en_US/section_158670c44b251b5b028c4e3178ff4ed0.html

Regards
Samuel