X-Jupitae Flexoid is a powerful synthesizer designed to deliver rich and complex sound textures through its three different simultaneous oscillators. Each oscillator offers unique voice configurations with up to 11 voices per note and a selection of 26 waveforms. Users can customize maximum harmonics from 1 to 512, allowing for precise control over the tonal character. This design enables the creation of intricate soundscapes by combining the 'Morph', 'Multi', and 'Flexi' oscillator types in various ways.

The synthesizer features dual multi-mode filters that can be set up in serial or parallel configurations, enhancing sound shaping possibilities. It includes four graphic envelopes with 32 stages each, along with Ribbon and XY Pad controllers that provide intuitive modulation options. X-Jupitae Flexoid supports 28-note polyphony and offers a Mono mode for focused lead sounds. An interactive pattern arpeggiator adds rhythmic complexity, while the large GUI ensures easy access to all functions, streamlining the creative workflow.

Beyond its synthesis capabilities, Flexoid is equipped with a comprehensive multi-effect section, including gate, compressor, five-band EQ, degrader, distortion, ensemble, auto panner, stereo image, chorus, delay/echo, and true stereo reverb. This extensive effects suite allows users to further sculpt and enhance their sounds within a single interface. As a variation of the X-Jupitae Wide-Boy, it shares a similar user interface and functional layout, making it accessible for users familiar with the series while providing its own distinctive sonic potential.