Hello there, When loading a stereo audio file either via sndbuf or WvIn the audio is downmixed to mono automatically, is that right? If not, is there a way of accessing left/right channels from audio files? is there a way of reading stereo files while keeping them stereo and writing them back as stereo files? The following code will write a mono file in out.wav regardless the input file is stereo or mono: WvIn audio_in => WvOut audio_out => blackhole; audio_in.path( "stereo_file.wav"); audio_out.wavFilename("out.wav"); 10::second => now My second question is on regards to being able to process audio faster than realtime just for audio processing tasks and when no "audible" output is needed. Is it possible or will it be possible in the future? An example will probably be more explanatory. Let's say that you want to remove DC-offset from an audio file, but you just want to process the audio file and there's no need to listening realtime audio. If such audio file is 3 min long, one must wait 3 min in order to finish processing. Chuck has a strong sense of time, but if there are no connections to dac could a "time_less unit of time" be created in order to speed up? My apologies if these issues have been discussed earlier on the list. Thanks, eduard