shared_ptr<AudioBuffers> audio (new AudioBuffers (_sndfile_content->audio_channels(), this_time));
sf_read_float (_sndfile, audio->data(0), this_time);
audio->set_frames (this_time);
shared_ptr<AudioBuffers> audio (new AudioBuffers (_sndfile_content->audio_channels(), this_time));
sf_read_float (_sndfile, audio->data(0), this_time);
audio->set_frames (this_time);