update readme

README.md

@@ -170,6 +170,10 @@ Tip: You can download https://github.com/josStorer/sgm_plus and unzip it to the
 to use it as an offline sound source. Please note that if you are compiling the program from source code, do not place
 it in the source code directory.
 
+If you don't have a MIDI keyboard, you can use virtual MIDI input software like `Virtual Midi Controller 3 LE`, along
+with [loopMIDI](https://www.tobias-erichsen.de/wp-content/uploads/2020/01/loopMIDISetup_1_0_16_27.zip), to use a regular
+computer keyboard as MIDI input.
+
 ### USB MIDI Connection
 
 - USB MIDI devices are plug-and-play, and you can select your input device in the Composition page

README_JA.md

@@ -169,6 +169,10 @@ Tip: You can download https://github.com/josStorer/sgm_plus and unzip it to the
 to use it as an offline sound source. Please note that if you are compiling the program from source code, do not place
 it in the source code directory.
 
+MIDIキーボードをお持ちでない場合、`Virtual Midi Controller 3 LE`
+などの仮想MIDI入力ソフトウェアを使用することができます。[loopMIDI](https://www.tobias-erichsen.de/wp-content/uploads/2020/01/loopMIDISetup_1_0_16_27.zip)
+を組み合わせて、通常のコンピュータキーボードをMIDI入力として使用できます。
+
 ### USB MIDI Connection
 
 - USB MIDI devices are plug-and-play, and you can select your input device in the Composition page

README_ZH.md

@@ -163,6 +163,9 @@ for i in np.argsort(embeddings_cos_sim)[::-1]:
 小贴士: 你可以下载 https://github.com/josStorer/sgm_plus, 并解压到程序的`assets/sound-font`目录, 以使用离线音源. 注意,
 如果你正在从源码编译程序, 请不要将其放置在源码目录中
 
+如果你没有MIDI键盘, 你可以使用像 `Virtual Midi Controller 3 LE` 这样的虚拟MIDI输入软件,
+配合[loopMIDI](https://www.tobias-erichsen.de/wp-content/uploads/2020/01/loopMIDISetup_1_0_16_27.zip), 使用普通电脑键盘作为MIDI输入
+
 ### USB MIDI 连接
 
 - USB MIDI设备是即插即用的, 你能够在作曲页面选择你的输入设备