If you don’t have my Ear Training CD program – play a P5th on the piano or keyboard by playing 1 to 5. You can play from c to g, singing c as 1 and g as 5. You may begin on any piano key, just make sure your first key is 1 and the fifth key is 5. EX – g to d. or f to bflat.
Repeatedly sing this 5th until it is well established in your head.
Contact me at [email protected] if you need help.
Now, get to work! 🙂