Thanks to all for sharing their knowledge and views.
So two books can be referred for correct pronunciation:
"GURBANI DI BHASHA TE VYAKARAN" by Dr. Harkirat Singh jee Gurmukhi linguistics and Gurbani Bhasha scholars from Punjabi university----------as suggested by 'SPNadmin'
"Gurbani Viakaran" by Prof Sahib Singh ----------as suggested by 'Gyani Jarnail Singh'
I totally agree that the use of sihari or ounkarh changes the meaning of the base word.
Code:
I want to believe that it has to be pronounced too. Because if you are reading gurbani, you can see the word and understand the meaning but if you are only hearing it and the sihari/ounkar before last letter is not pronounced, how would the listener understand the correct meaning?
So, I believe, it has to be pronounced.
The correct pronunciation is very important. I heard a story where a person reading gurbani in front of Guru Gobind Singh Sahibji got a punishment for not pronouncing the word correctly.
The word Ki(K with sihari) is pronounced as ki(k with short i). There is no other pronunciation to it. So now one has to look at the grammatical rules( at the time of writing) for words with single letter or words with many letters.
Like many commented that, it is subtle. Not a very long trailing sound at the end of it but still there to clearly differentiate between words with or without sihari/ounkarh.
THerefore, from all the posts, I'd like to believe that Waheguru sound is NOT Wah-Long a- Guru sound. If this was the case, the h should have lav not sihari.
But short i sound. That the sihari stands for.