Astralis Bion stands out as the most powerful synth in the Astralis lineup, featuring a custom-built oscillator with over 3500 waveform options and a wide selection of filter types such as Low Pass, High Pass, Band Shelf, and Comb filters. While the Astralis synths focus on creating immersive atmospheric and ambient soundscapes, Bion's extensive capabilities make it suitable for a broad range of musical styles. Its design enables musicians to explore rich textures and dynamic sound layers with ease.

The synth is composed of two identical engines, each equipped with individual envelopes, filters, and modulation options. Among its many features are a programmable arpeggiator, microtuner with Scala file support, gate and modulation sequencers, LFOs, and a flexible modulation matrix. A sophisticated randomization system allows users to generate fresh sounds effortlessly, with options to randomize entire synth sections or individual components like oscillators. This combination of depth and accessibility encourages creativity and quick experimentation.

Astralis Bion also boasts a robust effects section, including stereo delay, flanger/filter, ring modulator, SoundScaper, organic effects, and a compressor. The SoundScaper effect specializes in creating complex delay-based textures such as reverbs and echoing delay beds, with 127 routing configurations offering extensive sound design possibilities. Additionally, the built-in recorder captures synth output in high-quality WAV formats, and the synth comes with 300 preset patches shared across the Astralis series, providing immediate inspiration for producers and sound designers.