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FFMPEG change Tone Frequency (Pitch Audio) - Stack Overflow
https://stackoverflow.com/questions/53374590/ffmpeg-change-tone-frequency-pitch-audio#:~:text=Basic%20method%20is%20ffmpeg%20-i%20100h.mp3%20-af%20asetrate%3D44100%2A0.9%2Caresample%3D44100,should%20be%20replaced%20with%20the%20input%20sample%20rate.
FFMPEG change Tone Frequency (Pitch Audio) - Stack …
https://stackoverflow.com/questions/53374590/ffmpeg-change-tone-frequency-pitch-audio
ffmpeg -i 100h.mp3 -af asetrate=44100*0.9,aresample=44100 90h.mp3 where 44100 should be replaced with the input sample rate.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
Set the audio sampling frequency. For output streams it is set by default to the frequency of the corresponding input stream. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is mapped to the corresponding demuxer options. -aq q (output) Set the audio quality (codec-specific, VBR). This is an alias for -q:a.
[Audio processing] FFMPEG speed-frequency format and ...
https://www.programmerall.com/article/82331017928/
import os import string import subprocess as sp # Full path of ffmpeg FFMPEG_BIN = " /Users/karl/Documents/python/audio/tool/ffmpeg " # Full path of sourceDir sourceDir = " /Users/karl/Documents/python/audio/ " # Full path of targetDir targetDir = " /Users/karl/Documents/python/newdir/ " # Sample frequency sf = 11025 # Extension setting …
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