Sleepy-Time DSP has released Lisp, a level-independent sibilance processor for Windows.

Sleepy-Time DSP Lisp

Lisp is a new type of de-esser that automatically tracks the volume and pitch of your audio to help reduce harsh sibilance issues quickly and easily.

Whether you use a traditional de-esser, sidechained compressor, dynamic EQ, or even edit your tracks manually, cleaning up sibilance problems in your vocals can get pretty tedious. Lisp is new type of de-esser that aims to speed-up this process with its automatic sibilance detection algorithm.

Internally tuned to the human vocal range, Lisp can automatically detect and lower annoying “ss”, “teh”, and “ch” sounds in your audio by tracking both the amplitude and pitch of its input in real-time. Just set the reduction amount and let Lisp do the rest!

Lisp features

  • Automatic sibilance detection.
  • Up to 20 dB of transparent reduction.
  • Manual mode for reducing specific frequencies.
  • Left, Right, Mid, and Side modes for de-essing stereo tracks.

Lisp for Windows (32/64-bit, VST2/VST3) is available as freeware.

More information: Sleepy-Time DSP / Lisp