sox: unrecognized option `--info'

Hi,

I've been using your library flawlessly on my Mac. Unfortunately I've been running into problems when trying to use it on a CentOS 6 box. I've installed the 14.2.0 version of Sox that comes with yum.

When I try and run the library it throws the following error:
sox: unrecognized option `--info'

Have you come across this before?

When I try running sox --info directly on the command gives the following:

```
sox: unrecognized option `--info'
sox: SoX v14.2.0

Failed: invalid option

Usage summary: [gopts] [[fopts] infile]... [fopts] outfile [effect [effopts]]...

SPECIAL FILENAMES (infile, outfile):
- Pipe/redirect input/output (stdin/stdout); use with -t
-d, --default-device Use the default audio device (where available)
-n, --null Use the `null' file handler; e.g. with synth effect
-p, --sox-pipe Alias for `-t sox -'

SPECIAL FILENAMES (infile only):
"|program [options] ..." Pipe input from external program (where supported)
http://server/file Use the given URL as input file (where supported)

GLOBAL OPTIONS (gopts) (can be specified at any point before the first effect):
--buffer BYTES Set the size of all processing buffers (default 8192)
--combine concatenate Concatenate multiple input files (default for sox, rec)
--combine sequence Sequence multiple input files (default for play)
--effects-file FILENAME File containing effects and options
-h, --help Display version number and usage information
--help-effect NAME Show usage of effect NAME, or NAME=all for all
--help-format NAME Show info on format NAME, or NAME=all for all
--input-buffer BYTES Override the input buffer size (default: as --buffer)
--interactive Prompt to overwrite output file
-m, --combine mix Mix multiple input files (instead of concatenating)
-M, --combine merge Merge multiple input files (instead of concatenating)
--plot gnuplot|octave Generate script to plot response of filter effect
-q, --no-show-progress Run in quiet mode; opposite of -S
--replay-gain track|album|off Default: off (sox, rec), track (play)
-R Use default random numbers (same on each run of SoX)
-S, --show-progress Display progress while processing audio data
--version Display version number of SoX and exit
-V[LEVEL] Increment or set verbosity level (default 2); levels:
1: failure messages
2: warnings
3: details of processing
4-6: increasing levels of debug messages
FORMAT OPTIONS (fopts):
Input file format options need only be supplied for files that are headerless.
Output files will have the same format as the input file where possible and not
overriden by any of various means including providing output format options.

-v|--volume FACTOR Input file volume adjustment factor (real number)
-t|--type FILETYPE File type of audio
-s/-u/-f/-U/-A/-i/-a/-g Encoding type=signed-integer/unsigned-integer/floating-
point/mu-law/a-law/ima-adpcm/ms-adpcm/gsm-full-rate
-e|--encoding ENCODING Set encoding (ENCODING in above list)
-b|--bits BITS Encoded sample size in bits
-1/-2/-3/-4/-8 Encoded sample size in bytes
-N|--reverse-nibbles Encoded nibble-order
-X|--reverse-bits Encoded bit-order
--endian little|big|swap Encoded byte-order; swap means opposite to default
-L/-B/-x Short options for the above
-c|--channels CHANNELS Number of channels of audio data; e.g. 2 = stereo
-r|--rate RATE Sample rate of audio
-C|--compression FACTOR Compression factor for output format
--add-comment TEXT Append output file comment
--comment TEXT Specify comment text for the output file
--comment-file FILENAME File containing comment text for the output file

AUDIO FILE FORMATS: 8svx aif aifc aiff aiffc al amb au avr caf cdda cdr cvs cvsd dat dvms f4 f8 fap flac fssd gsm hcom htk ima ircam la lpc lpc10 lu mat mat4 mat5 maud nist ogg paf prc pvf raw s1 s2 s3 s4 sb sd2 sds sf sl smp snd sndfile sndr sndt sou sox sph sw txw u1 u2 u3 u4 ub ul uw vms voc vorbis vox w64 wav wavpcm wv wve xa xi
PLAYLIST FORMATS: m3u pls
AUDIO DEVICE DRIVERS: alsa ao oss ossdsp

EFFECTS: allpass band bandpass bandreject bass bend chorus compand contrast dcshift deemph delay dither earwax echo echos equalizer fade filter flanger gain highpass ladspa loudness lowpass mcompand mixer noiseprof noisered norm oops pad phaser pitch rate remix repeat reverb reverse riaa silence spectrogram speed splice stat stretch swap synth tempo treble tremolo trim vol

EFFECT OPTIONS (effopts): effect dependent; see --help-effect
```

When I run the same on my Mac I get the following:

```
sox: SoX v

Usage: soxi [-V[level]] [-T] [-t|-r|-c|-s|-d|-D|-b|-B|-e|-a] infile1 ...

-V[n] Increment or set verbosity level (default is 2)
-T With -s, -d or -D, display the total across all given files

-t Show detected file-type
-r Show sample-rate
-c Show number of channels
-s Show number of samples (0 if unavailable)
-d Show duration in hours, minutes and seconds (0 if unavailable)
-D Show duration in seconds (0 if unavailable)
-b Show number of bits per sample (0 if not applicable)
-B Show the bitrate averaged over the whole file (0 if unavailable)
-e Show the name of the audio encoding
-a Show file comments (annotations) if available

With no options, as much information as is available is shown for
each given file.
```

Version 14.4.1 is installed on my Mac (by Brew).