Disclaimer: Method or trick I have applied here is for personal usage. You may not be taught this method in musical institute and class. it is just a try to help you in easy way. The music is used in this video royalty free and I have permission to use it under the Creative Commons license. No copyright intended. www.bensound.com I have deliberately made this video longer for your practice; just in case, if you are completely new to black and white key pattern of harmonium, piano and electric keyboard. All you have to do just follow the 3 simple rule and you can play all Vowel from any key.