Pronunciation of a Hebrew letter


#1

Someone told me that the proper way to pronounce the ‘sof’ (last letter of the aleph-bais) is ‘th’. Should I daven and say brochos using this pronounciation? (note: I am Ashkenazi and so is the person who told me about the ‘sof’ being ‘thoff’)


#2

Better not to change from what you have been doing till now. We don’t have solid evidence of what it was originally.