歌唱 and 演奏: vocal expression, practice, plans, and endings
Compare 歌唱 in applauded singing and daily vocal practice with 演奏 in a planned piano performance and applause after a performance ends. Preserve the purpose, future timing, and event order in each example.
歌唱: singing and the purpose of practice
歌唱 (かしょう) focuses on singing or vocal expression. 「合唱団の力強い歌唱に、大きな拍手が送られました。」 means “The choir's powerful singing received loud applause.” The choir's powerful singing received applause. The sentence identifies the singing as the activity that drew this response.
「歌唱の表現力を高めるため、毎日練習しています。」 means “I practice every day to improve my vocal expression.” The speaker practices every day, with improvement in vocal expression as the purpose. 高めるため states what the practice is intended to achieve, without asserting that the improvement has already been achieved.
演奏: a future piano performance and a completed event
演奏 (えんそう) appears here with playing an instrument and a performance. 「姉は文化祭でピアノを演奏します。」 means “My sister will play the piano at the school festival.” The sister's piano performance at the school festival is a future event in the translation. It should not be retold as something she has already completed.
「静かな演奏が終わると、会場から拍手が起こった。」 means “When the quiet performance ended, applause rose from the hall.” The quiet performance ended before the applause rose from the hall. 終わると links the end with the response, so the applause should not be moved to a point before the performance began.
Read activity, purpose, and time together
The 歌唱 examples concern vocal expression and practice intended to improve it. The 演奏 examples concern a piano performance to come and a performance that has ended. Voice and instrument help identify the activities here, but these examples do not establish categories that can never overlap.
The choir's applauded singing and the quiet performance followed by applause are separate examples. There is no basis for merging their performers or venues into one event. Keep a practice goal, a future plan, and a response to a completed performance distinct when reading their time relationships.
What is the purpose of daily practice in 「歌唱の表現力を高めるため、毎日練習しています。」?
Show the answer and why
The purpose is to improve vocal expression. The sentence states daily practice and its goal; it does not state that the improvement has already been achieved.