bend note meaning in English

推弦使音弯曲

That is why the lessons about blues , that is , lessons 21 to 40 , talk so much about bending notes
这也是在课程21到课程40里，为何要花篇幅去讨论压音的原因。
However , to play blues with other musicians , it is important to be able to bend notes
然而，在同其他音乐家协同演奏布鲁斯音乐时，能压出合适的音符是很重要的。
I have been able to make bendings which sounds just like the records . i heared of some softwares can verify the bending notes . so is it true
压音是吹出来了，但是还是觉得有点不对劲，虽然和录音差不多，我听人家说有软件可以判断，这是真的吗？
How to konw that the bent note sound right ? where can i find the tune software as the top post said , and how to use ? thanks
我如何知道我是正确的压出了音，而不是发出了怪声呢？楼主所说的调音软件哪里可以找到，如何使用呢?如能赐教，万分感谢！