"CHECK OUT our new online prayerbook! [ http://torahjudaism.org/siddur.pdf ]
b-ezrath HaShem, hardcovers should be available soon!
The ancient Hebrew Alef-bet, with explanation of the sounds - all of these letter pronunciations are found among Yemenite and Iraqi Jewish communities. Many of the other unique pronunciations are found among many other Middle Eastern / Asian Jewish communities. Since it isn't known with certainty what the exact pronunciation of samakh is... therefore I can't really say with 100% that this is the truly original pronunciation."