然后，根据此基音信息，对输入信号进行格式转换。
A note has a fundamental tone- the pitch we hear- and a series of overtones that occur at higher frequencies.每个单音都有一个基本调—我们听到的音调—以及一系列的高频调外音。
The team then took a fundamental tone pitched below 5 kHz and digitally filtered it to leave just the overtones above 6 kHz.研究小组接着选取一个音调低于5千赫兹的基本音，滤掉低于6千赫兹的所有声音。
A note has a fundamental tone- the pitch we hear- and a series of overtones that occur at higher frequencies.每个单音都有一个基本调—我们听到的音调—以及一系列的高频调外音。
