def get_audio(filepath, seg_start, seg_duration, targetfs=None, verbose=True):
""" for use only with wav files from rwc database """
# rewriting using scikits.audiolab
import scikits.audiolab as audiolab
# small hack search for alternate
if not op.exists(filepath):
filepath = op.splitext(filepath)[0] + '.wav'
if not op.exists(filepath):
filepath = op.splitext(filepath)[0] + '.WAV'
sndfile = audiolab.Sndfile(filepath, 'r')
fs = sndfile.samplerate
(n, c) = (sndfile.nframes, sndfile.channels)
if verbose: print "Reading"
# initalize position
sndfile.seek(int(seg_start * fs), 0, 'r')
audiodata = sndfile.read_frames(int(seg_duration * fs))
sndfile.close()
if verbose: print "Done"
if targetfs is not None and not (targetfs == fs):
if verbose: print "Resampling"
sig = Signal(audiodata, fs)
sig.resample(targetfs)
audiodata = sig.data
fs = targetfs
if verbose: print "Done"
return audiodata, fs
