I wonder if there are any VSTs which remove automatically the main harmonic content from an audio source.

For example, if I have a simple sine wave, this hypothetical software/device would return absolutely nothing, silence.

If the sine wave has been previously distorted a bit, then this device would return at least some of the noise produced by the distortion, omitting the frequency of the original sine wave.

What I wish is a tool that does not only automatically removes one single frequency, but a set of frequencies that might be harmonically related. For example, passing a pure sawtooth through the device would also return silence.

I think that a device like this has to exist already. Any pointers?

Thanks! :)

  • Do you care about GUI or CLI? what OS? what pricing is acceptable? How about solutions that require some coding (like python or PHP or somthing) - not that I know of any but just out to get more information about your desired tool. Commented Apr 30, 2014 at 18:04
  • @NickWilde : thanks for the suggestions. Why do you mention CLI? In what sense this might be related to a VST? I did not set initially the OS because I am interested in knowing if something exists, even if it's not compatible with my OS (which is Windows, by the way).
    – fstab
    Commented Apr 30, 2014 at 18:12
  • I'm not really familiar with VST but I would guess that CLI and GUI options would both be possible; assuming that to be the case I know that some people are congenitally averse to CLI so I like to check that. Commented Apr 30, 2014 at 18:29
  • @NickWilde : no. A VST is a plugin for music production software. It does not have a CLI in the traditional sense.
    – fstab
    Commented Apr 30, 2014 at 18:37

1 Answer 1


Assuming that it is possible to indicate/mark a region which has only/mainly the noise, and not other audio of interest. In that case, one could use the Noise Reduction tool in Audacity for this. This is a type of spectral subtraction noise reducer, so it works well for spectral content that is nearly constant over time.

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