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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xīn, xín, xǐn, xìn

first tune

xīn

heart mind; mood 心 xīn

new; newly up-to-date 新 xīn

hot; pungent in taste laborious; toilsome; suffering 辛 xīn

toilsome; laborious painstaking; hard-working 辛苦 xīn kǔ
laborious; toilsome 辛 xīn	bitter; painful 苦 kǔ

zinc (metal) 鋅 xīn

glad; joyful; delighted 欣 xīn

appreciate; appreciation admire; look at (something attractive) with pleasure 欣賞 xīn shǎng
glad; joyful 欣 xīn	admire; appreciate 賞 shǎng

Chinese characters also pronunced xīn

fourth tune

xìn

letter; mail faith; believe 信 xìn

confidence 信心 xìn xīn
faith; believe 信 xìn	heart 心 xīn

Chinese characters also pronunced xìn