不想买total recorder也可以用开源免费的软件Audacity来进行内录。
  
Free, open source, cross-platform audio software
Audacity is an easy-to-use, multi-track audio editor and recorder for Windows, macOS, GNU/Linux and other operating systems.
Developed by a group of volunteers as open source.
  
软件官方网址
https://www.audacityteam.org
  
windows平台下的内录设置说明
https://manual.audacityteam.org/man/tutorial_recording_computer_playback_on_windows.html

【 在 forscher 的大作中提到: 】
: 这个软件哪有能用的下载？ 百度上搜了前几个都是假的或者病毒
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