---
title: "第 13 课 · 低音 B 与延音线 · Piakno"
description: "认出 B3，并把延音线连起来的两个音数成一个时值"
url: "https://piakno.com/zh-Hans/course/piano-foundations/lesson/13"
lang: "zh-Hans"
alternates:
  en: "https://piakno.com/course/piano-foundations/lesson/13.md"
  zh-Hans: "https://piakno.com/zh-Hans/course/piano-foundations/lesson/13.md"
  zh-Hant: "https://piakno.com/zh-Hant/course/piano-foundations/lesson/13.md"
  ja: "https://piakno.com/ja/course/piano-foundations/lesson/13.md"
  ko: "https://piakno.com/ko/course/piano-foundations/lesson/13.md"
  es: "https://piakno.com/es/course/piano-foundations/lesson/13.md"
  de: "https://piakno.com/de/course/piano-foundations/lesson/13.md"
  pt-BR: "https://piakno.com/pt-BR/course/piano-foundations/lesson/13.md"
---

# 低音 B 与延音线

> 认出 B3，并把延音线连起来的两个音数成一个时值

- [零基础钢琴乐理主线课](https://piakno.com/zh-Hans/course/piano-foundations)
- [上一课 · 速度记号：谱头的那个词和那个数字](https://piakno.com/zh-Hans/course/piano-foundations/lesson/12)
- [下一课 · 低音 A 与拍号](https://piakno.com/zh-Hans/course/piano-foundations/lesson/14)