Spira
Prepare to be mesmerized by the Korora Audio Spira, a filter pedal that conjures the mind-bending illusion of an endless, undulating glissando. Inspired by the pioneering work of psychoacoustic researcher Roger Shepard, this ingenious device harnesses the power of resonant bandpass filters to create a captivating, hypnotic effect. As you engage the Spira, you'll be swept away by a swirling, layered tone that seems to ascend and descend endlessly, defying the laws of musical logic. The secret lies in the pedal's carefully tuned filter network, which generates the uncanny sensation of a perpetual, overlapping glissando - a sonic trick that has enchanted listeners since Shepard first described it in 1964. Whether you're a devotee of psychedelic rock, atmospheric ambient, or simply seeking to inject some mind-bending movement into your sound, the Spira is a must-have tool. Its undulating, ever-evolving textures are perfect for adding depth and intrigue to any musical context, from shimmering pads to growling, morphing lead lines. Renowned for its ability to induce a sense of unease and wonder, the Spira has found favor with adventurous musicians exploring the outer realms of guitar tone. Plug in, get lost in the mesmerizing sweep, and let your sonic imagination soar to new dimensions.