Anyone try souring rice?

[homebrewdr]

I was going to make a horchata (mexican rice drink) by soaking rice in water overnight. Got lazy, and 4 days later its still soaking and started to sour and smells like a sour mash but lighter. I've never heard of anyone souring rice for a homebrew, but it interests me. I know rice is commonly used for many styles, but not soured rice. Was gonna throw it into my next brew session mash for a farmhouse ale. Any thoughts?

 

[Sourz4life]

I've done it a few times and thats also how you make a few beverages around the world. Since lactic acid bacteria can eat complex sugars they can feed on some of those sugars offered by the rice as you soak them.

I'd say as long as its a nice clean lactic sour, chuck it in.