问题
I want to exchange 16kHz pcm --> 48kHz wav using sox. however, pcm file isn't applied in sox.
so, I just changed pcm to raw, and then sox -r 16000 -e signed -b 16 -c 1 test.raw -r 48000 out.wav
Can I apply for pcm file not convert raw?
回答1:
For the PCM file, since PCM's are headerless, you need to add '-t raw' as the first argument.
sox -t raw -r 16000 -e signed -b 16 -c 1 test.raw -r 48000 out.wav
Try that out.
Also try the different Endian settings; -L; -B; -x though only use one at a time, and only if not using one doesn't work.
回答2:
There is no need to convert the input file into raw. Sox can handle pcm files.
sox input.pcm -r 48000 output.wav
The input file can either be a .pcm or .wav.
Since .wav files have a header containing audio metadata (such as sample rate, bit precision, file length, etc), you don't have to pass any information about the input file. Hence, non need to use:
-r 16000 -e signed -b 16 -c 1
Converting pcm to raw you have just stripped down the file header.
来源：https://stackoverflow.com/questions/22934432/apply-for-pcm-file-as-sox