While studying electronic engineering and computer science, I participated in a compiler workshop where we had to write our own programming language. To view and analyse the syntax tree for a given program, I wrote a custom drawn tree component those

通过删除节点，可以删除相映的记录，包含带子节点的节点-by removing nodes can be removed form a contrast to the record, including scallops of nodes

Using the FIR filter to achieve the voice signal filtering, and the output of the waveform, to achieve before and after filtering contrast.