This accomplished the following, and again I have arrowed in the relevant sections: mediainfo luckynight_44_16. Now I am no SoX master but the following command certainly converted the above file to a sampling rate of 44.1 kHz and Bit depth of 16 bits (as you have requested): sox luckynight_48_24.wav -r 44100 -b 16 luckynight_44_16.wav Options are specified before the file they apply to, so options before the input file may be used to specify the format of the input file, and options after the input file and before the output file may be used to specify the desired format of the output. Since the raw PCM data does not include this information, you will need to specify it on the command line. The header includes the format, sample rate, and number of channels. I created a sample file with the sampling rate of 48.0 kHz and Bit depth of 24 bits, I have arrowed in the relevant sections: mediainfo luckynight_48_24.wavĬodec ID : 00000001-0000-0010-8000-00AA00389B71 The wav container just adds a simple header to the raw PCM data. Then, I try to run this command below for converting mp3 file into wav file : ffmpeg -i input.mp3 -acodec pcms16le -ac 1 -ar 16000 output.wav. With the auto option, ffmpeg will use the variant that works. By default, ffmpeg will only write 32-bit headers. Therefore, I downloaded it to my local computer. If the size of the output file is larger than 232-1, the WAV header needs to be 64-bits large. I suspect that SoX might be a better tool for this job. I grabbed some mp3 files from Free Music Archive to avoid misconduct usage of a licensed audio files.
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