Rediscovered and compiled for release shortly before her death in November 2023, Further Selections from the Electric Harpsichord presents a never-before-heard recording of composer and artist Catherine Christer Hennix's early magnum opus. Originally debuted in 1976 at the festival Brouwer's Lattice at Stockholm's Moderna Museet, The Electric Harpsichord has steadily mystified fans and students of Western minimalist music for its implacable, transformative qualities, and the long-held, relative obscurity of its creator. Like the work of Hennix's close friend La Monte Young, the piece is set in just intonation and focuses on the transcendental potentials of precise tuning, inspired by their studies with Pandit Pran Nath. Composed of bursts of oscillating, synthetic tones using a carefully retuned synthesizer and a tape-based system for feedback delay, the sounds swirl, twinkle, and appear to bend time, space, and perception. Additional, sustained chords on the sheng, most likely played by her Deontic Miracle bandmate Hans Isgren, are present at the opening of the piece and reemerge towards the end of the recording.

The release of Further Selections constitutes the most comprehensive original recording of this foundational work to date. Originally billed as The Well-Tuned Organ during its debut in Sweden, The Electric Harpsichord has developed a legendary reputation, predicated on a twenty-six minute fragment salvaged and circulated by Hennix's friend Henry Flynt. Promoting its importance on multiple occasions, Flynt aired the work on WBAI radio, organized a pair of tape concerts at New York alternative arts spaces in 1970s, and later penned a 1998 essay which served as the liner notes to its eventual CD release in 2010. For him, this work not only represented a sterling milestone in minimal sonic aesthetics, but also spawned a new genre that he dubbed "hallucinogenic/ecstatic sound environments (HESE)," which in turn inspired his own drone-like compositions. Gradually, interest in the recording led to a spate of archival projects, public performances, and new compositions by Hennix in the 2010s, in turn drawing into focus her multifarious practice, which includes serious contributions towards mathematics, poetry, sculpture, Noh drama, philosophy, and light art. Since 2018, Blank Forms has spearheaded a comprehensive publication effort in support of her work, including the writing collection Poësy Matters and Other Matters (2018); archival recordings like Selected Early Keyboard Works (2018) and The Deontic Miracle's Selections from 100 Models of Hegikan Roku (2019); and recent compositions such as Blues Alif Lam Mim (2021) and Solo for Tamburium (2023).