PX Apollo

PX Apollo View full size


PX Apollo logo

PX Apollo is based on a rare synthesizer prototype from the early ‘70s of which only 2 are known to exist. Part of a larger project that was eventually abandoned, this instrument was the precursor to one of the world’s first and most prolific polyphonic analog synthesizers. With a sound that can be described as rich, warm and surreal, this instrument was extraordinarily playable for the time, sporting velocity sensitivity and a performance interface, while its polyphonic 71-voice architecture signaled the coming paradigm shift in synthesizer design that would soar during the following decade.

The PX Apollo project represents an enormous effort and commitment to quality on many levels. Due to the components available at the time of their design, early polyphonic synthesizers were and remain particularly susceptible to failure and require continued maintenance. The unit used for PX Apollo was no exception, initially inoperable it required a tremendous restoration effort and no expense was spared to ensure complete authenticity and original functionality.


PX Apollo GUIPX Apollo GUI

With the restoration complete we set about to document this historic instrument as accurately as possible. We created a huge master sample catalogue with the best hardware available. Each key was sampled in a multitude of configurations and for each 4 round-robins were created per note. The resulting PX Apollo sound bank consists of over 4,000 samples. From this library over 150 patches were made by our sound design team, delivering a fantastic collection of ready-to-play patches.

The UI for PX Apollo was inspired by the aesthetics of the original hardware, while the layout and control schema were designed to provide intuitive and efficient use while maximizing flexibility, allowing for both quick edits to preset sounds and deep customization by way of a full compliment of synthesis tools and effects including 3 oscillators, envelope generators, high-quality filters, pitch and stereo controls and per-oscillator modulation and arpeggiation.

PX Apollo provides a glimpse into a key moment of synthesizer history at one of the industries most important turning points, delivering a rich and detailed sound with a warm and pronounced character.

⬇ PX Apollo User Manual 

PX Apollo GUIPX Apollo GUIPX Apollo GUI

PX Prototype Series

PX Apollo marks the first release of our PX Prototype Series, exploring the oft veiled world of unique, fringe and unreleased electronic and acoustic instruments.

PX Prototype Series

PX Apollo is compatible with current versions of UVI Workstation, a featured freeware sample instrument, and Falcon, a premier hybrid instrument combining 15 oscillators, 80 effects, modulators, scriptable event processors and more.

Simple, Flexible Authorization

License on your computer or iLok key, use your software on up to 3 devices concurrently

UVI | Authorization


  • Size : 1.13 GB (FLAC lossless encoding, was 3.39 GB in WAV)
  • Collection : PX Prototype Series
  • Content : 1 instrument, 4,002 Samples, 153 Presets
  • Sample Resolution : 44.1 kHz. Recording at 96 kHz
  • Miscellaneous : UVI Workstation v2.6.2 or Falcon v1.0.5 required

Product Manuals

PX Apollo User Guide 
UVI Workstation User Guide 

Technical Specifications

Supported Formats, Supported Operating Systems, Hard Drive, Requirements, Tested and Certified DAW : Check here

Installation Guide

Click here

Henrik P

Like cup of hot chocolate on a winters day.

Loving this instrument! It's warm, intimate and emotive.
I can really hear that this is an old instrument because certain voices have their flaws, which makes it unique and organic.
Great presets that inspire me to make music, and easy to tweak.

Well done UVI!

  • 2 out of 2 people found this review useful.
Pete K

Snowed In ... PX Apollo + Falcon to the rescue!

Um, WOW! This with Falcon and SparkVerb is just blowing my mind guys.

Also, you have to watch this: https://www.youtube.com/watch?v=J_XE9HwPAgo

Kinda freaky intro, but lots of fun (the video) ... and it's like I'm back in the golden age of synthesis ova heah!

  • 2 out of 2 people found this review useful.

Write your comment

PX Apollo

PX Apollo

A rare prototype of the one of the world's first polyphonic analogue synths is resurrected for the debut of our PX Prototype Series

Write your comment