This is a short breakdown of the original Sony Playstation's iconic startup sound. There is a quick addendum to this video showing the audio samples being played in a software synthesizer: https://www.youtube.com/watch?v=K7gV6RdIeUQ
The original composition and sound samples were created by Takafumi Fujisawa.
https://blog.playstation.com/2019/12/05/how-takafumi-fujisawa-created-the-original-playstations-startup-sound/
NOTE: The audio samples for the BIOS are easy to extract from the BIOS file using a program called "PSound": http://snailrush.online.fr/ I cannot redistribute the copyrighted BIOS file or the samples contained within it.
0:00 Introduction
0:18 Mentioning how the BIOS is extracted
0:29 Overview of the BIOS
1:07 Introduction to the startup sound
1:28 The audio samples
2:55 Technical details of the audio
3:16 PSound
3:26 Conclusion