your command lets sox assume that the first file has a sample rate of 8000.
I think you want to do this: sox -r 22000 input_2kHz.wav -r 8000 output_8kHz.wav resample ** Changed in: sox (Ubuntu) Status: New => Invalid -- converting frequency only converts the header https://bugs.launchpad.net/bugs/218169 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs