By applying psychoacoustic and audiometric principles, the Vitalizer achieves a verifiable enhancement in sonic quality. The Vitalizer processes only the original signal and generates no artifacts.

Patented filtering techniques highlight the richness of the audio signal in all its detail, while the interactive parameters make it possible to alter the sound in a musical and effective way. This unique combination of precise filtering and intuitive usability enable you to instantly make any music production more stimulating and natural-sounding: music and speech are made clearly distinguishable and comprehensible, loudness is made more intense, and the whole soundscape becomes noticeably wider.

One of the Vitalizer’s main features is the unmasking of overlapping sounds. The way it works is, in principle, opposite to the way compression formats (MP3, etc.) do: instead of deleting allegedly unnecessary information, it enhances it. In order to do that, the Vitalizer takes into account the perception of a frequency in relation to its volume. By shifting louder frequencies slightly in time, softer and formerly overlapping sounds are “unmasked” and made audible. The audible effect of unmasking could be described in general terms as more clarity and depth in a mix. Lows sound more powerful and better defined, mids more focused and differentiated, and highs more vivid and brilliant. The included mono version can be used on individual channels to emphasize the sound character of instruments or vocals. The clarity and definition achieved guarantee an adequately perceptible presence in the mix.

Another characteristic of the Vitalizer’s sound optimization process is the adaptation of the sound spectrum to the non-linear sensitivity of human hearing. This phenomenon was audiometrically proved in the 1930’s, thanks to the equal loudness contours (also known as the Fletcher-Munson curves after their discoverers). According to these curves, the human ear is most sensitive to mid frequencies, i.e. to the frequency range of speech. As a result, frequencies below 200 Hz and above 6000 Hz need reinforcement in order to achieve a well-balanced auditory impression – frequencies between 6 kHz and approximately 11 kHz are perceived as being 5 dB softer, for example. The Vitalizer uses the equal-loudness contours to balance the frequency spectrum according to human hearing, which in turn improves loudness. As a result, individual elements of a mix can sound more present without an actual increase in level. At the same time, the sum signal also benefits from the Vitalizer processing, since it can achieve the same loudness with less sound pressure level.

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.

SPL hardware products can be found in the world’s most renowned facilities, and have become a staple for audio professionals ranging from home studio owners to top mastering engineers. With the growth of computer based audio systems, the need for the SPL sound in plugin form has also grown. With Analog Code plugins, that coveted SPL sound is now available right inside your DAW.

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


  • Patented technology for automatic sound optimizing
  • Process single tracks, sub groups or sum signals
  • Increases loudness
  • Simple, intuitive interface
  • Bass, mid and top end processing
  • Unmasks overlapping sounds
  • Mono, stereo or multi-channel operation

Audio Examples

Industry Reviews

  • Ethan Mates
    Ethan Mates

    Add clarity without EQ, just like the classic! This box gives you top end air and presence like nothing else!

  • Thomas Gold
    Thomas Gold

    Great tool, I’m using it on vocals and in the master chain -- great to make a vocal shine and stand out of a mix. Or just to ‘beautify’ the master a bit

  • Stonebridge

    Awesome tone on this EQ; it's another one I sometimes bang on a bus or a tired mix down or an mp3 promo that just sounds too boring. Excellent presets for starting position.

  • Josh Newell
    Josh Newell

    The Vitalizer is a really handy tool for getting tracks to cut through dense mixes. It's great for bringing out heavy guitars or keys in a layered metal mix.

  • DJ Swivel
    DJ Swivel

    The SPL Vitalizer MK2-T is my go-to plugin when I want to add a little magic to almost any sound. Whether it’s pianos, guitars, or vocals, I can always count on the Vitalizer to make a modest… Read More

Customer Reviews

  • ★★★★★
    Vitalizer MK2-T Magic
    by Brian
    Sutil at first. Really brings out the thump without the gain. High-Low frequency vibrance. Wakes things up
  • ★★★★★
    Vitalizer MK2-T
    by bpavelmac
    creates good color mix also sounds great on the track, the individual instruments!
  • ★★★★★
    Incredible Plugin.
    by Juancan
    Easy to use high quality plugin. Stereo knob is just amazing.
  • ★★★★★
    Secret Tool
    by AreG
    Amazing tool, so smooth and I love the top end on kicks and vocals. The kind of tool to employ when nothing else works (just like Aphex Aural Exciter).
  • ★★★★★
    holy cannoli
    by ggg
    Instantly became part of my master bus template. Fantastic!


Supported Plugin Formats
AAX DSP, AAX Native, AU, AAX AudioSuite, Venue 32-bit, VST2, VST3

Supported Operating Systems
Mac OS X 10.8 through 10.13
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