Do not use YouTube rips. They are compressed to 128kbps MP3, which destroys the delicate 4-bit artifacts. Look for "4ormulator v1 full ISO archive" on Internet Archive (search for user obscure_shareware_1998 ). The file is public domain as abandonware.
was not a mainstream tool. Developed in the late 1990s by a small British shareware company called Sonic Foundry’s lesser-known European rival (often misattributed to a developer named "J. P. Fournier," though this remains apocryphal), 4ormulator was a "formant-morphing" utility. 4ormulator v1 sound effect
Its purpose was academic: to allow audio engineers to swap the vocal tract characteristics of one sound onto another. Want to make a dog’s bark sound like it is saying "hello"? 4ormulator v1 could theoretically do it. In practice, however, the algorithm was catastrophically unstable. Do not use YouTube rips
