My modifications to spectrogram.c to plot frequency on log axis and also to
limit upper and lower plotted frequency are close to being complete.
I'm not very familiar with sox, and my C a bit rusty, so if any seasoned
sox developers have the time to review my code, that would be great. The
log axis on its own didn't require much code change, but I found the
frequency limits needed a fair bit of new parsing code. Specifying
frequency limits (at least a lower bound) is necessary in log plots else a
good part of the screen will be wasted in frequencies 1 - 100 Hz which is
not the most useful for audio.
I've documented the changes at this blog post:
http://jdesbonnet.blogspot.ie/2014/02/sox-spectrogram-log-frequency-axis-and.html
And the code is here:
https://github.com/jdesbonnet/joe-desbonnet-blog/tree/master/projects/sox-log-spectrogram
If this code is worth contributing please advise what are the next steps
(if any). Consider this code contributed under whatever terms that are
required to have it added to the project.
Regards,
Joe Desbonnet.
------------------------------------------------------------------------------
Android apps run on BlackBerry 10
Introducing the new BlackBerry 10.2.1 Runtime for Android apps.
Now with support for Jelly Bean, Bluetooth, Mapview and more.
Get your Android app in front of a whole new audience. Start now.
http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk
_______________________________________________
SoX-devel mailing list
SoX-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/sox-devel
