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FFmpeg Filters Documentation
https://ffmpeg.org/ffmpeg-filters.html
Apply spectral tilt filter to audio stream. This filter apply any spectral roll-off slope over any specified frequency band. The filter accepts the following options: freq. Set central frequency of tilt in Hz. Default is 10000 Hz. slope. Set slope direction of tilt. Default is 0. Allowed range is from -1 to 1. width. Set width of tilt. Default is 1000.
FFmpeg Audio Filters Gallery - vacing.com
https://www.vacing.com/ffmpeg_audio_filters/index.html
sounds like a robot talking. ./ffmpeg -i ~/audio_source/noisy_speech.wav -filter_complex "afftfilt=real='hypot(re,im)*sin(0)':imag='hypot(re,im)*cos(0)':win_size=512:overlap=0.75" fftfilt_robot_voice.wav. whisper effect. sounds like a whisper.
How to use filtered audio in complex filter in FFMPEG ...
https://stackoverflow.com/questions/57940426/how-to-use-filtered-audio-in-complex-filter-in-ffmpeg
The showfreqs filter uses the original audio stream instead of the filtered one. Command: ffmpeg -i audio.mp3 -filter_complex highpass,showfreqs,format=yuv420p highpass.mp4. I tried naming the highpass output but it didn't make any difference: ffmpeg -i audio.mp3 -filter_complex highpass[hi],[hi]showfreqs,format=yuv420p highpass.mp4
(FFmpeg) How to Add a High-Pass Filter to an Audio Track ...
http://johnriselvato.com/ffmpeg-how-to-add-a-high-pass-filter-to-an-audio-track/
The filter in FFmpeg is called highpass and is used by setting the desired cut off frequency in Hz. For example, here bass lower than 300Hz is remove: $ ffmpeg -i input.mp3 -af "highpass=f=3200" output.mp3 The high-pass filter removes the lower frequencies but for the opposite effect, a low-pass filter is used.
FFmpeg Bitstream Filters Documentation
https://ffmpeg.org/ffmpeg-bitstream-filters.html
When you configure your FFmpeg build, all the supported bitstream filters are enabled by default. You can list all available ones using the configure option --list-bsfs . You can disable all the bitstream filters using the configure option --disable-bsfs , and selectively enable any bitstream filter using the option --enable-bsf=BSF , or you can disable a particular …
FFmpeg audio filter pipeline for speech enhancement ...
https://dsp.stackexchange.com/questions/22442/ffmpeg-audio-filter-pipeline-for-speech-enhancement
In man ffmpeg-filters, there are several examples that may be of interest: Make music with both quiet and loud passages suitable for listening to in a noisy environment: compand=.3|.3:1|1:-90/-60|-60/-40|-40/-30|-20/-20:6:0:-90:0.2. Another example for audio with whisper and explosion parts:
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