The following video demonstrates each syllable of the pinyin structure
and the exercise of pinyin/zhuyin with basic Chinese 4-tune pronunciation

Mandarin pinyin tunes
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xuān, xuán, xuǎn, xuàn

first tune

xuān

announce; declare; proclaim 宣 xuān

Chinese characters also pronunced xuān

second tune

xuán

profound; abstruse oracular; enigmatic 玄 xuán

rotate; revolve; spin 旋 xuán

hang; suspend unsettled; unresolved 懸 xuán

Chinese characters also pronunced xuán

third tune

xuǎn

choose; choice select; selection 選 xuǎn

fourth tune

xuàn

flaunt; show off shining; bright and dazzling 炫 xuàn

dizzy; giddy dazzled; dazzling 眩 xuàn

Chinese characters also pronunced xuàn