Hey everyone, I've been having some trouble with my alveolar trill. I can do an alveolar 'tap' (like 'pero') but I can't do a full trill ('perro') and make it sound natural. When speaking my first language (Dutch), I pronounce my r's with a uvular trill. Now I can do an alveolar trill as well, but I can only seem to do it while also doing a uvular trill! Has anyone else experienced this and how do I solve it?
One thing that I've found helps is if you prepare your throat by saying bitter a few times. This helped me. Also, just keep trying and eventually you'll get it :). Good luck!!
One of the things that helped me once I got serious about it was putting the tip of my tongue at the very top of my mouth, then blowing out air as hard as I can, trying to maintain the flutter as long as I could. What I had in mind when I was doing it was that I would need to push out the right amount of so I can get a consistent sound. Then I tried narrowing down to bursts. Afterwards I moved my tip closer to where they say you should put it (that ridge behind your two front teeth) and again aggressively pushed out air until it was consistent, then trying to do it in bursts.
Another thing that helped was a site I used that has plenty of sentences that have words with the "rr" sound: http://www.learn-spanish-faster.com/phrases/practice-rolling-r-phrases.html After doing what I mentioned above, I was on this page daily trying to translate sound I was making into actual words and sentences. Months later I am able to say these sentences way better than before.
Hope my advice was helpful!
EDIT: This other site has a tongue twister that you can practice daily once you have it memorized. I've been doing it to this day! http://www.livinglanguage.com/community/discussion/48/tongue-twisters-in-spanish-trabalenguas/p1