Raspberries freezer burn

I don't really have much experience with fruit, and I don't brew lambics, but why can't you simply defrost the raspberries and taste a few of them?

Freezer burn is merely a result of surface moisture loss and should not affect the flavor of the fruit. However, the fact that it happened to your berries means they were probably stored in a less than ideal container, and that means they may have picked up other undesirable flavors floating around in your freezer.

Let your senses be your guide. If they taste good, then I say go for it. Fruit to beer ratio looks pretty good, btw.

 

Have you tasted your lambic? Too many people decide to add fruit before they taste it and see what would really mesh well with the flavors in that specific beer, IMO this ends up making a less than perfect beer, let the beer tell you what fruit (if any) to add

For my tastes raspberries blend well with a brighter, more citrusy sour that the funk is a bit restrained in, also the acidity should be on the soft side as the raspberries will add a lot of their own pucker

If its more earthy/funky, you migh try black cherries, dates, caramelized blood orange, or heather

Now back to the freezer burn. Youve waited 14mos for this beer to add fruit to, why add freezer burned fruit?? Raspberries are cheap right now, go pick up some good ones, or better yet taste your beer and THEN decide what fruit to add