How do you pronounce sonic route 44?

There's no official pronunciation for "Sonic Route 44" because it's not a real thing.

* Sonic is a video game character, and it's pronounced like "SOH-nik".

* Route is a common word and is pronounced "root".

* 44 is pronounced "forty-four".

So, if you were to combine those words, it would be pronounced "SOH-nik root forty-four."

However, without more context, it's hard to know if this phrase actually has a meaning. Are you perhaps thinking of something else?