Martin McCormick (12021-08-18): > arecord: set_params:1345: Channels count non available > sox FAIL formats: can't open input `-': WAVE: RIFF header not found If you read carefully, you will notice that your problem is not with sox, it is with arecord: sox only fails because arecord fails and does not produce anything. arecord itself fails because "channels count not available": the sound device you are using does not like mono, it obviously like only stereo. You have two options: - Use a sound device that supports mono. Since you cannot change your hardware, it needs to be done in software with an ALSA plugin. This is all streamlined, you only need to write plughw instead of hw. - Keep recording in stereo, and have sox convert it to mono before saving. You will need to peruse the manual page of sox to know the option, I only ever use ffmpeg for obvious reasons. Note that: - If you use plughw instead of hw, then the ALSA plugin can also resample, and therefore you no longer needs sox at all. - sox is capable of recording from ALSA directly, with something like "-t alsa plughw:0". Regards, -- Nicolas George
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