Understanding iptables: What you really need to master is not the rules, but the flow of data packets.
1. Introduction Actually, I've wanted to write an article about iptables for a long time. Although I don't use it regularly, every time I do need to use it, I find that I've completely forgotten the relevant knowledge and have to go through it all again. This is because I've learned a certain knowledge point without reinforcing it through writing…
Awakening of Sound: Basics (Part 2): From Note Names to Simplified Musical Notation
1. From Pitch Names to Solfège: Why Singing Requires a Different Perspective In a previous article (see: The Awakening of the Voice - Basics (Part 1): Pitch Structure and Auditory Stability), I introduced a fundamental fact of the modern vocal system: sound does not exist randomly. Starting with overtone structure, a certain…
The Awakening of Sound: Fundamentals (Part 1): Pitch Structure and Auditory Stability
1. Why did I write this article? The purpose of this article is not to create a vocal tutorial, nor is it a complete overview of music theory. It's more like a record of my own reflections—an attempt to answer a simple yet complex question: What am I actually listening to? And why are these sounds perceived by me in this way…
The third optimization of the blog architecture: WordPress dual-active node adjustment and database import considerations.
1. The Reason for the Third Optimization of the Blog's Active-Active Architecture A few days ago, I was preparing to perform a routine maintenance operation on the Mac mini node in the blog's active-active architecture: upgrading the Portainer version. However, a seemingly insignificant small problem ultimately caused the entire node…
声音的觉醒(五):原 key 迷思——为什么有时候“不按原 key 唱”,反而更能唱出你自己的声音
1. When we get used to "the original singer is the standard," we forget whose voice it is. Most people, when they start singing, implicitly have an "invisible standard" in their minds—whatever key the original singer sings in, we should sing in the same key. It seems that only by completely copying the original can we be recognized…
声音的觉醒(四):科班声乐体系与普通人自学唱歌的天然断层——语言、方式与结构的差异
1. Introduction Having recently achieved initial success in "larynx control," I've been reflecting on the detours I've taken over the past two years in researching "singing"—it wouldn't be an exaggeration to say it was a winding, circuitous road. The fundamental reason for these many detours was that I was initially misled by the teachings of various online "vocal teachers"...
声音的觉醒(三):”高位置”的误区与科学解读
1. Entering the 'High Position': A Mythologized Concept of High Notes Many people who have studied singing and watched countless instructional videos are familiar with the term "high position." A quick search on Bilibili (a Chinese video-sharing website) for "high position" yields a screen full of tutorials, each titled "Unlocking the Secrets to High Notes," "Singing High Notes Easily..."
Why is WordPress more prone to "Error establishing database connection" on entry-level VPS? A systematic analysis from database to architecture.
1. Introduction I've been using a base-level VPS (US$39/year) from Racknerd's Chicago data center to build the "read-only node" in my blog's active-active architecture for about half a year now. Over this time, the VPS's overall stability has been quite good…
声音的觉醒(二):被误解的声音——高音的错觉与低音的幻觉
1. Introduction In the past two years of dedicated study of singing, I encountered a very thorny problem: my ear's ability to distinguish sounds couldn't keep up with my body's vocal production. Professional vocalists, upon listening to an original recording, can often immediately determine exactly how high a high note is and whether a low note is truly that deep; but for someone like me…