Just to mention: someone pointed out a glitch in my code (actually, in the underlying "audiolab" module, or so it seems) - code updated: https://gist.github.com/danstowell/8872466 Dan 2014-02-07 Dan S <danstowell+lxau@xxxxxxxxx>: > Hi Matt, > > Here's a Python script which analyses a set of files in a specified > folder. They have to be file formats understood by libsndfile - which > allows for flac/wav/aiff and some others, but not mp3. It takes maybe > 5 to 10 seconds per track, but eventually it produces a plot as a PNG > file. > > https://gist.github.com/danstowell/8872466 > > (Also blogged: <http://mcld.co.uk/blog/blog.php?417>) > > Best > Dan > > 2014-02-05 Matt Garman <matthew.garman@xxxxxxxxx>: >> >> I have a collection of FLAC files, all ripped from my CD collection >> What I would like to do is run an analysis across all the music to >> determine how the bass/lower frequencies are generally mixed. For >> example, how much content below (for example) 150 Hz is on the left >> channel versus the right channel? >> >> I'm not sure if "histogram" is the right word, but in my mind what >> I'd like to see, per-channel, is something like this: >> >> 150--125 Hz: x samples >> 125--100 Hz: y samples >> 100--80 Hz: z samples >> ... >> >> Then I can look at the two channels of a song, and if the histograms >> are approximately the same, I can assume the bass was mixed equally >> to both channels. >> >> I am a programmer, and thought it would be easy to quickly hack >> something up that would do this, but I have no experience with >> signal processing, and as I started reading about this, I quickly >> got in over my head! So I was hoping there might already exist a >> tool that has this functionality. >> >> Note that I don't need any kind of graphical output, as this needs >> to be wrapped up in some kind of batch processing script---I have >> about 11,000 files to analyze! >> >> The motivation for this is: I have a hardware DAC (digital audio >> converter) in one part of my house, and a subwoofer in another. >> There is a single coax run between the DAC and subwoofer, so I can >> only send one channel. If the overwhelming majority of my music has >> the bass mixed equally, sending only one channel isn't a problem. >> But if I choose the "L" channel to send to the sub, and much music >> has the bass mixed only to the "R" channel, then I won't be able to >> hear the low frequencies. I want to find out how often this might >> happen. >> >> Thanks, >> Matt >> >> >> _______________________________________________ >> Linux-audio-user mailing list >> Linux-audio-user@xxxxxxxxxxxxxxxxxxxx >> http://lists.linuxaudio.org/listinfo/linux-audio-user > > > > -- > http://www.mcld.co.uk -- http://www.mcld.co.uk _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
