将音频文件发送给QQ好友的方法如下（以Windows10系统的QQ2019最新版为例，需要准备好音频文件）：

1、使用桌面搜索或双击桌面上的快捷方式打开QQ应用程序。

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2、输入自己的用户名和密码，点击“安全登录”，登录QQ。

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3、在随后进入的主界面中点击需要发送音频的好友。

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4、进入聊天框后，将准备好的音频文件拖入聊天界面中。

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5、随后点击“发送”即可发送音频文件给好友。

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