This collection contains 2 Analog Code plugins that emulate both the classic single and modern dual band versions of SPL’s analog hardware de-essers - considered by many to be the very best in professional recording. Just like the hardware versions, no other de-esser plugin gets the job done as easily and precisely while maintaining the character of the original source.

Traditional de-essers compress the frequency range where esses typically occur. Without constant knob-tweaking, these de-essers can deliver lispy- or nasally-sounding vocals, especially on tracks with high amounts of sibilance. SPL´s Auto Dynamic De-Esser eliminates these challenges by monitoring the entire frequency spectrum and automatically detecting the sibilant frequencies. The bandwidth is set so narrowly around the range of the sibilance that neighboring frequencies remain unaffected. This frequency band is mixed back into the main signal phase-inverted to cancel out the sibilance. The result is precise de-essing that is incredibly simple to apply, while preserving the original character and timbre of the voice - even at high reduction settings.

The SPL De-esser plugins also contain features not found on the original hardware, such as an M/S Stereo mode that allows you to de-ess a full mix and without losing the high frequencies of cymbals, guitars or keyboards. This makes the SPL De-Esser a valuable tool during mastering.

The Analog Code
During listening tests of this technology, a hardware developer remarked that SPL had “cracked the Analog Code!” and in the process, coined the name of SPL’s software product line.

Download the fully functional 14-day demo today to hear for yourself! (No dongle required!)


SPL Desser:

  • S-Reduction amount
  • Auto-Threshold (automatically compensates for vocalists moving off/on mic during a performance)
  • A/B Switch to compare settings
  • Selectable algorithms for Male/Female
  • M/S (Mid/Side) Stereo mode

SPL Dual Band De-esser:

  • High S-Reduction amount
  • Low S-Reduction amount
  • High Band in/out
  • Low Band in/out
  • A/B Switch to compare settings
  • Male/Female select

Customer Reviews

  • ★★★★★
    SPL De-Essers
    by Dynamic-Plugin
    I needed a good - and not too expencive possibility to reduce sibilant frequencies and found the right one.
    You must not be an audio-engineer to understand this plugin: Just work with the… Read More
  • ★★★★★
    Spl desser
    by Thirdeyem
    Sounds great on vocals and also spectacular on master bus.
  • ★★★★☆
    SPL De-Essers
    by looshamik
    Great sound and ease of use!. Good job.
  • ★★★★★
    SPL DE-Esser
    by Botas Mono
    Recently i had to mix a vocal track with a high amounts of sibilance. With normal eqs, even with a dynamik eq, the result was not satisfying for me. So i checked out the SPL De-Esser. This tool is… Read More
  • ★★★★★
    Top Tier
    by RH
    This is the best ITB deesser I've used—and I also own all of the usual contenders—it's incredibly simple to use yet superbly powerful.
    Unlike other deessers which take considerable tweaking… Read More


Supported Plugin Formats
AAX DSP, AAX Native, AU, AAX AudioSuite, SoundGrid, Venue AAX, VST2, VST3

Supported Operating Systems
Mac OS X 10.8 through 10.12
Windows 7 through 10
Pro Tools 10.3.10 or higher or any VST/VST3/AU-compatible host running on a supported operating system

Intel CPU only (minimum 2 GHz recommended)

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


With the Installation Manager, you can select, download and install just the Plugin Alliance products and formats you need for your system. During this initial release, we at Plugin Alliance look forward to hearing the feedback of our valued customers, as your input will help shape future versions of this utility.