SPL Vitalizer MK2-T

Patented Sound Quality.


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


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

Supported Operating Systems
Mac OS X 10.6 through OSX 10.10*
Windows 7 or 8**
Pro Tools 9 or higher or any VST/VST3/AU-compatible host running on a supported operating system

Intel CPU only (minimum 2 GHz recommended)
*We do not currently support OS X El Capitan

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)
** We do not currently support Windows 10

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