A series of mechanical improvements continuing well into the nineteenth century, including the introduction of pedals to sustain tone or to soften it, the perfection of a metal frame, and steel wire of the finest quality, finally produced an instruments c
A series of mechanical improvements continuing well into the nineteenth century, including the introduction of pedals to sustain tone or to soften it, the perfection of a metal frame, and steel wire of the finest quality, finally produced an instruments c
十九世纪一系列持续的机械进步，包括踏板的传入、金属结构的完善和钢丝最完美的质量，最后产生了一种能容纳无数音调－从最精致的和弦到一个成熟管弦的声音或从一个清澈的歌声到辉煌的敲击乐的效果－的乐器。