Saosin is an American post-hardcore band from Orange County, California, United States. The band was formed in 2003 and recorded its first EP, Translating the Name, that same year original vocalist Anthony Green left Saosin due to personal reasons. In 2004, Cove Reber replaced Green as vocalist after auditioning for the role. The group recorded its self titled debut album which was released on Capitol Records on September 26, 2006.

After the audition process and several guest vocalists on demos, the then 19-year-old Cove Reber was announced as their new permanent lead singer. Reber had sent in his demo tape, which was an acoustic demo with "Mookie's Last Christmas". The demo has since leaked onto the internet. It is widely speculated to have included a few songs from Translating the Name. When Beau Burchell first heard the demo, he thought it was Anthony playing a trick on them, as Reber's vocal stylings were very similar to those of Green's when the demo was originally recorded.  In an interview with PlayPro.com, Reber commented that "everyone I've played with wants to make music their lives...Saosin is a band on a completely different level. All these dudes are freaks about music."  Reber's addition to the band was difficult, for the more experienced Green was the center piece of the band in the eyes of Saosin's fans. Many fans consider the time with Green to be something entirely different from the time with Reber. There are still distinct fans of both eras (Green Era/Reber Era) debating on which is a better fit for the band as a whole.  Saosin played the Taste of Chaos tour the following winter. Saosin was signed to Capitol Records in March and toured the United States with the Warped Tour for the second time. That summer, they released the Saosin EP. At first it was intended to be a free sampler, but Capitol Records would not allow this and released it as an EP. It contained demo versions of songs later recorded on their first full-length album. A video to their new single "Bury Your Head" was filmed during the tour. The band continued touring for the rest of 2005, opening for Avenged Sevenfold and Coheed and Cambria.Answer this question using a quote from the following article:

Were any of the demos with guest vocalist released?