Denoise audio samples with FFT.
A description of the accepted parameters follows.
- nr
-
Set the noise reduction in dB, allowed range is 0.01 to 97. Default value is 12 dB.
- nf
-
Set the noise floor in dB, allowed range is -80 to -20. Default value is -50 dB.
- nt
-
Set the noise type.
It accepts the following values:
- w
-
Select white noise.
- v
-
Select vinyl noise.
- s
-
Select shellac noise.
- c
-
Select custom noise, defined in
bnoption.Default value is white noise.
- bn
-
Set custom band noise for every one of 15 bands. Bands are separated by ’ ’ or ’|’.
- rf
-
Set the residual floor in dB, allowed range is -80 to -20. Default value is -38 dB.
- tn
-
Enable noise tracking. By default is disabled. With this enabled, noise floor is automatically adjusted.
- tr
-
Enable residual tracking. By default is disabled.
- om
-
Set the output mode.
It accepts the following values:
- i
-
Pass input unchanged.
- o
-
Pass noise filtered out.
- n
-
Pass only noise.
Default value is o.
Commands
This filter supports the following commands:
- sample_noise, sn
-
Start or stop measuring noise profile. Syntax for the command is : "start" or "stop" string. After measuring noise profile is stopped it will be automatically applied in filtering.
- noise_reduction, nr
-
Change noise reduction. Argument is single float number. Syntax for the command is : "noise_reduction"
- noise_floor, nf
-
Change noise floor. Argument is single float number. Syntax for the command is : "noise_floor"
- output_mode, om
-
Change output mode operation. Syntax for the command is : "i", "o" or "n" string.