3.3.9
Filters
Audio
Video
Sinks
Audio
Video
Sources
Audio
Multimedia
Video
7.1
7.0.2
6.1.2
6.0.1
5.1.6
5.0.3
4.4.5
4.3.8
4.2.10
4.1.11
4.0.6
3.4.13
3.2.19
3.1.11
3.0.12
2.8.22
2.7.7
2.6.9
2.5.11
2.4.14
2.3.6
2.2.16
2.1.8
2.0.7
1.2.12
1.1.16
1.0.10
0.11.5
0.10.16
0.9.4
0.8.15
0.7.17
acompressor A compressor is mainly used to reduce the dynamic range of a signal.
acrossfade Apply cross fade from one input audio stream to another input audio stream.
acrusher Reduce audio bit resolution.
adelay Delay one or more audio channels.
aecho Apply echoing to the input audio.
aemphasis Audio emphasis filter creates or restores material directly taken from LPs or emphased CDs with different filter curves.
aeval Modify an audio signal according to the specified expressions.
afade Apply fade-in/out effect to input audio.
afftfilt Apply arbitrary expressions to samples in frequency domain.
aformat Set output format constraints for the input audio.
agate A gate is mainly used to reduce lower parts of a signal.
alimiter The limiter prevents an input signal from rising over a desired threshold.
allpass Apply a two-pole all-pass filter with central frequency (in Hz) frequency, and filter-width width.
aloop Loop audio samples.
amerge Merge two or more audio streams into a single multi-channel stream.
amix Mixes multiple audio inputs into a single output.
anequalizer High-order parametric multiband equalizer for each channel.
anull Pass the audio source unchanged to the output.
apad Pad the end of an audio stream with silence.
aphaser Add a phasing effect to the input audio.
apulsator Audio pulsator is something between an autopanner and a tremolo.
aresample Resample the input audio to the specified parameters, using the libswresample library.
areverse Reverse an audio clip.
asetnsamples Set the number of samples per each output audio frame.
asetrate Set the sample rate without altering the PCM data.
ashowinfo Show a line containing various information for each input audio frame.
astats Display time domain statistical information about the audio channels.
atempo Adjust audio tempo.
atrim Trim the input so that the output contains one continuous subpart of the input.
bandpass Apply a two-pole Butterworth band-pass filter with central frequency frequency, and (3dB-point) band-width width.
bandreject Apply a two-pole Butterworth band-reject filter with central frequency frequency, and (3dB-point) band-width width.
bass Boost or cut the bass (lower) frequencies of the audio using a two-pole shelving filter with a response similar to that of a standard hi-fi’s tone-controls.
biquad Apply a biquad IIR filter with the given coefficients.
bs2b Bauer stereo to binaural transformation, which improves headphone listening of stereo audio records.
channelmap Remap input channels to new locations.
channelsplit Split each channel from an input audio stream into a separate output stream.
chorus Add a chorus effect to the audio.
compand Compress or expand the audio’s dynamic range.
compensationdelay Compensation Delay Line is a metric based delay to compensate differing positions of microphones or speakers.
crystalizer Simple algorithm to expand audio dynamic range.
dcshift Apply a DC shift to the audio.
dynaudnorm Dynamic Audio Normalizer.
earwax Make audio easier to listen to on headphones.
equalizer Apply a two-pole peaking equalisation (EQ) filter.
extrastereo Linearly increases the difference between left and right channels which adds some sort of "live" effect to playback.
firequalizer Apply FIR Equalization using arbitrary frequency response.
flanger Apply a flanging effect to the audio.
hdcd Decodes High Definition Compatible Digital (HDCD) data.
highpass Apply a high-pass filter with 3dB point frequency.
join Join multiple input streams into one multi-channel stream.
ladspa Load a LADSPA (Linux Audio Developer’s Simple Plugin API) plugin.
loudnorm EBU R128 loudness normalization.
lowpass Apply a low-pass filter with 3dB point frequency.
pan Mix channels with specific gain levels.
replaygain ReplayGain scanner filter.
resample Convert the audio sample format, sample rate and channel layout.
rubberband Apply time-stretching and pitch-shifting with librubberband.
sidechaincompress This filter acts like normal compressor but has the ability to compress detected signal using second input signal.
sidechaingate A sidechain gate acts like a normal (wideband) gate but has the ability to filter the detected signal before sending it to the gain reduction stage.
silencedetect Detect silence in an audio stream.
silenceremove Remove silence from the beginning, middle or end of the audio.
sofalizer SOFAlizer uses head-related transfer functions (HRTFs) to create virtual loudspeakers around the user for binaural listening via headphones (audio formats up to 9 channels supported).
stereotools This filter has some handy utilities to manage stereo signals, for converting M/S stereo recordings to L/R signal while having control over the parameters or spreading the stereo image of master track.
stereowiden This filter enhance the stereo effect by suppressing signal common to both channels and by delaying the signal of left into right and vice versa, thereby widening the stereo effect.
treble Boost or cut treble (upper) frequencies of the audio using a two-pole shelving filter with a response similar to that of a standard hi-fi’s tone-controls.
tremolo Sinusoidal amplitude modulation.
vibrato Sinusoidal phase modulation.
volume Adjust the input audio volume.
volumedetect Detect the volume of the input video.