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170 lines
5.2 KiB
Markdown
让我们使用 PC 键盘在终端演奏钢琴
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======
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厌倦了工作？那么来吧，让我们弹弹钢琴！是的，你没有看错，根本不需要真的钢琴。我们可以用 PC 键盘在命令行下就能弹钢琴。向你们介绍一下 `piano-rs` —— 这是一款用 Rust 语言编写的，可以让你用 PC 键盘在终端弹钢琴的简单工具。它自由开源，基于 MIT 协议。你可以在任何支持 Rust 的操作系统中使用它。
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### piano-rs：使用 PC 键盘在终端弹钢琴
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#### 安装
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确保系统已经安装了 Rust 编程语言。若还未安装，运行下面命令来安装它。
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```
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curl https://sh.rustup.rs -sSf | sh
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```
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（LCTT 译注：这种直接通过 curl 执行远程 shell 脚本是一种非常危险和不成熟的做法。）
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安装程序会问你是否默认安装还是自定义安装还是取消安装。我希望默认安装，因此输入 `1` （数字一）。
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```
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info: downloading installer
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Welcome to Rust!
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This will download and install the official compiler for the Rust programming
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language, and its package manager, Cargo.
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It will add the cargo, rustc, rustup and other commands to Cargo's bin
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directory, located at:
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/home/sk/.cargo/bin
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This path will then be added to your PATH environment variable by modifying the
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profile files located at:
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/home/sk/.profile
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/home/sk/.bash_profile
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You can uninstall at any time with rustup self uninstall and these changes will
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be reverted.
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Current installation options:
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default host triple: x86_64-unknown-linux-gnu
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default toolchain: stable
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modify PATH variable: yes
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1) Proceed with installation (default)
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2) Customize installation
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3) Cancel installation
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1
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info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
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223.6 KiB / 223.6 KiB (100 %) 215.1 KiB/s ETA: 0 s
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info: latest update on 2017-10-12, rust version 1.21.0 (3b72af97e 2017-10-09)
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info: downloading component 'rustc'
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38.5 MiB / 38.5 MiB (100 %) 459.3 KiB/s ETA: 0 s
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info: downloading component 'rust-std'
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56.7 MiB / 56.7 MiB (100 %) 220.6 KiB/s ETA: 0 s
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info: downloading component 'cargo'
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3.7 MiB / 3.7 MiB (100 %) 173.5 KiB/s ETA: 0 s
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info: downloading component 'rust-docs'
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4.1 MiB / 4.1 MiB (100 %) 224.0 KiB/s ETA: 0 s
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info: installing component 'rustc'
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info: installing component 'rust-std'
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info: installing component 'cargo'
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info: installing component 'rust-docs'
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info: default toolchain set to 'stable'
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stable installed - rustc 1.21.0 (3b72af97e 2017-10-09)
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Rust is installed now. Great!
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To get started you need Cargo's bin directory ($HOME/.cargo/bin) in your PATH
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environment variable. Next time you log in this will be done automatically.
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To configure your current shell run source $HOME/.cargo/env
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```
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登出然后重启系统来将 cargo 的 bin 目录纳入 `PATH` 变量中。
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校验 Rust 是否正确安装：
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```
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$ rustc --version
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rustc 1.21.0 (3b72af97e 2017-10-09)
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```
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太棒了！Rust 成功安装了。是时候构建 piano-rs 应用了。
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使用下面命令克隆 Piano-rs 仓库：
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```
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git clone https://github.com/ritiek/piano-rs
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```
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上面命令会在当前工作目录创建一个名为 `piano-rs` 的目录并下载所有内容到其中。进入该目录：
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```
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cd piano-rs
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```
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最后，运行下面命令来构建 Piano-rs：
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```
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cargo build --release
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```
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编译过程要花上一阵子。
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#### 用法
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编译完成后，在 `piano-rs` 目录中运行下面命令：
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```
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./target/release/piano-rs
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```
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这就是我们在终端上的钢琴键盘了！可以开始弹指一些音符了。按下按键可以弹奏相应音符。使用 **左/右** 方向键可以在弹奏时调整音频。而，使用 **上/下** 方向键可以在弹奏时调整音长。
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![][2]
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Piano-rs 使用与 [multiplayerpiano.com][3] 一样的音符和按键。另外，你可以使用[这些音符][4] 来学习弹指各种流行歌曲。
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要查看帮助。输入：
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```
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$ ./target/release/piano-rs -h
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piano-rs 0.1.0
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Ritiek Malhotra <ritiekmalhotra123@gmail.com>
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Play piano in the terminal using PC keyboard.
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USAGE:
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piano-rs [OPTIONS]
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FLAGS:
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-h, --help Prints help information
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-V, --version Prints version information
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OPTIONS:
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-c, --color <COLOR> Color of block to generate when a note is played (Default: "red")
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-d, --duration <DURATION> Duration to play each note for, where 0 means till the end of note (Default: 0)
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-s, --sequence <SEQUENCE> Frequency sequence from 0 to 5 to begin with (Default: 2)
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```
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我必须承认这是个超级酷的项目。对于那些买不起钢琴的人，很推荐使用这款应用。
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祝你周末愉快！！
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此致敬礼！
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/let-us-play-piano-terminal-using-pc-keyboard/
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作者：[SK][a]
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译者：[lujun9972](https://github.com/lujun9972)
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校对：[wxy](https://github.com/wxy)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://www.ostechnix.com/author/sk/
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[1]:data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
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[2]:http://www.ostechnix.com/wp-content/uploads/2017/10/Piano.png
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[3]:http://www.multiplayerpiano.com/
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[4]:https://pastebin.com/CX1ew0uB
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