Definition of the word bubble under

The phrase "bubble under" is commonly used in audio editing to describe the sound of a soft, faint sound preceding a stronger one. This term is derived from the way a bubble forms gradually underwater before breaking the surface, resulting in a similar auditory effect. In audio engineering, the term "bubble under" refers to a brief, low-volume precursor to a more prominent sound affecting the waveform on an audio track. When listening to a sequence of audio, this precursor may go unnoticed, but it can significantly improve the overall sound quality by providing a smooth, natural transition between sounds. The term "bubble under" was first introduced in the 1980s, around the time that digital audio editing became more widespread. Prior to this, audio engineers relied on techniques such as equalization and compression to achieve the same effect. However, with the advent of digital audio editing tools, it became possible to manipulate and process audio to a much greater extent, opening up new possibilities for fine-tuning and refining sound. The use of "bubble under" in audio editing has become a standard term in the industry, and it is often used alongside other technical terms such as "fade-out" or "reverb" to describe specific audio editing techniques. As digital audio editing continues to evolve, it is likely that new terms and techniques will emerge, but the basic concept of a "bubble under" will remain a foundational part of audio editing best practices.