Delete extra/etc/README.md

extra/etc/README.md

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-### ffx.sh
-
-quick apply audio effects w/ ffmpeg <br>
-
-<pre>
-supports
-mp3, wav, flac, ogg, opus, m4a, aac, mka
-
-features
--bass, treble, volume, distortion
--trim audio
--tempo change with pitch preservation
--pitch change with duration preservation
-
-example usage
-./ffx.sh bass audio.mp3 10 1
-
-helper commands
-ffbass "audio.mp3" 10 1 bassboosted.mp3
-bass audio.mp3 10 1
-bassboost audio.mp3
-</pre>
-
----
-
-<pre>
-help docs
-
-help and version
-./ffx.sh --help
-./ffx.sh --version
-
-commands
-./ffx.sh bass INPUT PERCENT [FINE_DB] [OUTPUT]
-./ffx.sh treble INPUT PERCENT [FINE_DB] [OUTPUT]
-./ffx.sh volume INPUT DB [OUTPUT]
-./ffx.sh distort INPUT [DRIVE_0_TO_10] [OUTPUT]
-./ffx.sh trim INPUT START_SECONDS [END_SECONDS] [OUTPUT]
-./ffx.sh tempo INPUT SPEED_0.125_TO_8 [OUTPUT]
-./ffx.sh pitch INPUT SEMITONES_-36_TO_36 [OUTPUT]
-
-bass and treble
-./ffx.sh bass song.mp3 25 1 bass-song.mp3
-./ffx.sh treble song.mp3 20 1 bright-song.mp3
-
-33 = 16.5 db
-66 = 33 db
-100 = 50 db
-fine_db is added or subtracted afterward.
-
-volume
-./ffx.sh volume song.mp3 -6 quieter-song.mp3
-./ffx.sh volume song.mp3 3 louder-song.mp3
-
-distortion
-./ffx.sh distort guitar.wav 5 distorted-guitar.wav
-
-trim audio
-./ffx.sh trim song.mp3 10 30 clip.mp3
-./ffx.sh trim podcast.mp3 30 60 no-intro.mp3
-
-tempo with pitch preservation
-./ffx.sh tempo lecture.mp3 1.5 fast-lecture.mp3
-./ffx.sh tempo song.mp3 0.75 slower-song.mp3
-
-pitch with duration preservation
-./ffx.sh pitch vocal.wav 3 higher-vocal.wav
-./ffx.sh pitch vocal.wav -5 lower-vocal.wav
-
-convert while editing
-./ffx.sh volume input.wav -3 output.mp3
-
-automatic output filename
-./ffx.sh bass song.mp3 30
-
-input:  star.mp3
-output: star333033.mp3
-</pre>
-
-<pre>
-install helper commands
-./ffx.sh --add-helper-cmd
-
-remove helper commands
-./ffx.sh --remove-helper-cmd
-
-cmd helpers
-  ffbass   INPUT PERCENT [FINE_DB] [OUTPUT]
-  fftreble INPUT PERCENT [FINE_DB] [OUTPUT]
-  ffvolume INPUT DB [OUTPUT]
-  ffdistort INPUT [DRIVE_0_TO_10] [OUTPUT]
-  fftrim   INPUT START_SECONDS [END_SECONDS] [OUTPUT]
-  fftempo  INPUT SPEED_0.125_TO_8 [OUTPUT]
-  ffpitch  INPUT SEMITONES_-36_TO_36 [OUTPUT]
-
-defaults
--output uses the source extension and a unique suffix.
--use an explicit filename ending in .mp3 for mp3 output.
-
-examples
-ffbass "audio.mp3" 33 2
-ffbass "song.wav" 33 2 "bass.mp3"
-fftreble "song.flac" 66 -4 "treble.flac"
-ffvolume "song.mp3" -3
-ffdistort "song.wav" 4 "distorted.mp3"
-fftrim "song.mp3" 12.5 48 "clip.mp3"
-fftempo "song.mp3" 0.5 "slow.mp3"
-ffpitch "song.mp3" -3 "lower.mp3"
-</pre>