##
FFmpeg Audio Plugins

The following is a list of the integrated audio plug-ins17 .

F_abench
  Benchmark part of a filtergraph.
F_acompressor
  Audio compressor.
F_acontrast
  Simple audio dynamic range compression/expansion filter.
F_acrusher
  Reduces audio bit resolution.
F_acue
  Delay filtering to match a cue.
F_adecorrelate
  Apply decorrelation to input audio stream.
F_adelay
  Delays one or more audio channels.
F_adenorm
  Remedy denormals by adding extremely low-level noise.
F_adynamicequalizer
  Apply dynamic equalization to input audio stream.
F_adynamicsmooth
  Apply dynamic smoothing to input audio stream.
F_aderivative
  Compute derivative of input audio.
F_aecho
  Adds echoing to the audio.
F_aemphasis
  Audio emphasis.
F_aeval
  Filters audio signal according to a specific expression.
F_aeexciter
  Enhance high frequency part of audio.
F_afade
  Fades in/out input audio.
F_aformat
  Convert the input audio to one of he specified formats.
F_afreqshift
  Apply frequency shifting to input audio.
F_afwtdn
  Reduce broadband noise from input samples using Wavelets.
F_agate
  Audio gate.
F_alatency
  Measure filtering latency.
F_allpass
  Applies a two-pole all-pass filter.
F_aloop
  Loops audio samples.
F_anoisesrc
  Generates a noise audio signal.
F_aperms
  Set permissions for the output audio frame.
F_aphaser
  Adds a phasing effect to the audio.
F_aphaseshift
  Apply phase shifting to input audio.
F_apsyclip
  Apply Psychoacoustic clipper to input audio stream.
F_arealtime
  Slows down filtering to match realtime.
F_aresample
  Resamples audio data.
F_asetrate
  Change the sample rate without altering the data.
F_aspectralstats
  Display frequency domain statistical information about the audio channels. Statistics are calculated and stored as metadata for each audio channel and for each audio frame.
F_astats
  Shows time domain statistics about audio frames.
F_asubboost
  Boost subwoofer frequencies.
F_asubcut
  Cut subwoofer frequencies.
F_asupercut
  Cut super frequencies.
F_asuperpass
  Apply high order Butterworth band-pass filter.
F_asuperstop
  Apply high order Butterworth band-stop filter.
F_atempo
  Adjusts audio tempo so that when you speed up audio, it will adjust the pitch accordingly to make audio sounds more normal, but faster without being badly distorted. Its behavior is similar to what can be seen when you watch a youtube video, click the gear icon, and select a speed greater or less than 1.
F_atilt
  Apply spectral tilt filter to audio stream.
F_atrim
  Pick one continuous section from the input, drop the rest.
F_bandpass
  Applies a two-pole Butterworth band-pass filter.
F_bandreject
  Applies a two-pole Butterworth band-reject filter.
F_bass
  Boosts or cuts lower frequencies.
F_biquad
  Applies a biquad IIR filter with the given coefficents.
F_chorus
  Adds a chorus effect to the audio.
F_compand
  Compresses or expands audio dynamic range.
F_compensationdelay
  audio compensation delay line.
F_crossfeed
  Apply headphone crossfeed which blends the left and right channels of a stereo audio recording. It is mainly used to reduce extreme stereo separation of low frequencies in order to produce more speaker like sound.
F_crystalizer
  Simple Expand Audio Dynamic Range filter.
F_dcshift
  Applies a DC shift to the audio.
F_drmeter
  Measure audio dynamic range where setting window length in seconds is used to split audio into segments of equal length.
F_dyaudnorm
  Dynamic Audio Normalizer. When using this plugin, be sure to attach effect to all audio tracks by dragging the plugin to the 1st audio track and then right mouse clicking all subsequent audio tracks which brings up an menu. Highlight the effect shown in the middle section and click OK.
F_earwax
  Widens the stereo image. When using this plugin, be sure to attach effect to all audio tracks by dragging the plugin to the 1st audio track and then right mouse clicking all subsequent audio tracks which brings up an menu. Highlight the effect shown in the middle section and click OK.
F_equalizer
  Applies two-pole peaking equalization (EQ) filter.
F_extrastereo
  Increases difference between stereo audio channels. When using this plugin, be sure to attach effect to all audio tracks by dragging the plugin to the 1st audio track and then right mouse clicking all subsequent audio tracks which brings up a menu. Highlight the effect shown in the middle section and click OK.
F_flanger
  Applies a flanging effect to the audio.
F_haas
  Apply Haas Stereo Enhancer for a more natural sounding pan effect or more clarity in the center of the mix. With this filter applied to mono signals it gives some directionality and stretches its stereo image.
F_highpass
  Applies a high-pass filer with 3 dB point frequency.
F_hilbert
  Generate a Hilbert transform FIR coefficients.
F_loudnorm
  EBU R128 loudness normalization.
F_lowpass
  Applies a low-pass filter with 3 dB point frequency.
F_mcompand
  Multiband Compress or expand audiodynamic range. The input audio is divided into bands which is like the crossover of a loudspeaker, resulting in flat frequency response when absent compander action.
F_pan
  Remix channels with coefficients (panning).
F_silenceremove
  Removes silence.
F_sine
  Generate sine wave audio signal.
F_stereotools
  Applies various stereo tools. When using this plugin, be sure to attach effect to all audio tracks by dragging the plugin to the 1st audio track and then right mouse clicking all subsequent audio tracks which brings up an menu. Highlight the effect shown in the middle section and click OK.
F_stereowiden
  Applies stereo widening effect. When using this plugin, be sure to attach effect to all audio tracks by dragging the plugin to the 1st audio track and then right mouse clicking all subsequent audio tracks which brings up an menu. Highlight the effect shown in the middle section and click OK.
F_tiltshelf
  Boost or cut the lower frequencies and cut or boost higher frequencies of the audio using a two-pole shelving filter with a response similar to that of a standard hi-fi’s tone-controls. This is also known as shelving equalization (EQ).
F_treble
  Boosts or cuts upper frequencies.
F_tremolo
  Applies tremolo effect.
F_vibrato
  Applies vibrato effect.
F_virtualbass
  Apply audio Virtual Bass filter.
F_volume
  Change input volume.
F_volumedetect
  Detect audio volume.

#### Footnotes

... plug-ins 17
  credit to WPfilmmaker