To help Lalli improve her violin playing skills, the music teacher should provide constructive feedback and focus on technical components of emotional expression in music.
In order for Lalli to improve her violin playing skills, as her music teacher, I would focus on providing constructive feedback and guidance.
One approach could be to break down emotional expression in music into technical components, similar to how a cello master class coach deconstructed 'emotion' for a musician, enhancing Lalli's understanding of the nuances in her playing.
Encouraging Lalli to practice consistently and work on specific technical aspects, such as bow pressure, bow stroke arc, body movement, and tempo control, would be crucial for her growth as a violin player.
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