Source 1: https://youtu.be/rtL5oMyBHPs?t=226
Source 2: https://www.youtube.com/watch?v=5qNgbIGsrtM
Source 3: https://youtu.be/ydWjQwvzxKw?t=70
Source 4: https://www.youtube.com/watch?v=7vh_5RDi1e4
Source 5: https://www.youtube.com/watch?v=rtL5oMyBHPs
Source 6: http://www.timkraack.com/blog/2018/8/7/rhythm-vs-pulse-vs-tempo
Source 7: https://www.youtube.com/watch?v=MObtxuZHK3c
Source 8: https://simple.wikipedia.org/wiki/Bar_(music)
Source 1: https://youtu.be/uzaYLK3k0DQ?t=33 Source 2: https://www.youtube.com/watch?v=R1kOdTm9FBk Source 3: https://www.elitedaily.com/p/these-20-hit-songs-that-were-written-by-other-artists-will-seri
Source 1: https://youtu.be/4IXOM4Q2Apc?t=6 Source 2: https://youtu.be/4IXOM4Q2Apc?t=8 Source 3: https://ramseyvoice.com/wp-content/uploads/2018/03/vibrato.jpg Source 4: https://youtu.be/j6TmogXhOZ8?t=
Source 1: https://www.youtube.com/watch?v=ViwtNLUqkMY&feature=emb_title Source 2: https://youtu.be/hm2YjDENPPU?t=9 Source 3: https://youtu.be/VBmMU_iwe6U?t=19 Source 4: https://youtu.be/bz6bF8HikIM?t=