recording sessions in stereo in mid-1954, and by that time even smaller labels in the U.S. such as Concertapes, Bel Canto and Westminster along with major labels such as RCA Victor began releasing stereophonic recordings on two-track prerecorded reel-to-reel magnetic tape, priced at twice or three times the cost of monaural recordings, which retailed for around $2.95 to $3.95 apiece for a standard monaural LP. Even two-track monaural tape which had to be flipped over halfway through and carried exactly the same information as the monaural LP but without the crackles and pops were being sold for $6.95. Stereophonic sound came to at least a select few living rooms of the mid-1950s. Stereo recording became widespread in the music business by the 3rd quarter of 1957. Stereo on disc In November 1957, the small Audio Fidelity Records label released the first mass-produced stereophonic disc. Sidney Frey, founder and president, had Westrex engineers, owners of one of the two rival stereo disk-cutting systems, cut a disk for release before any of the major record labels could do so. Side 1 featured the Dukes of Dixieland, and Side 2 featured railroad and other sound effects designed to engage and envelop the listener. This demonstration disc was introduced to the public on December 13, 1957 at the Times Auditorium in New York City.<ref>"Mass Produced Stereo Disc is Demonstrated," Billboard, Dec. 16, 1957, p. 27.</ref> Only 500 copies of this initial demonstration record were pressed and three days later, Frey advertised in Billboard Magazine that he would send a free copy to anyone in the industry who wrote to him on company letterhead."Mass Produced Stereo Disk is Demonstrated", Billboard, Dec. 16, 1957, p. 27. The move generated such a great deal of publicity that early stereo phonograph dealers were forced to demonstrate on Audio Fidelity Records. Also in December 1957, Bel Canto Records, another small label, produced its own stereophonic demonstration disc on multicolored vinyl so that stereo dealers would have more than one choice for demonstration. With the supplied special turntables featuring a clear platter lighted from underneath to show off the color as well as the sound, the stunt worked even better for Bel Canto, whose roster of jazz, easy listening and lounge music, pressed onto their trademark Caribbean-blue vinyl sold well throughout 1958 and early into 1959. Affordable cartridges When Audio Fidelity released its stereophonic demonstration disc, there was no affordable