2022-05-12
2908
#vanilla javascript
Iskander Samatov
106930
May 12, 2022 ⋅ 10 min read

Write an audio visualizer from scratch with vanilla JavaScript

Iskander Samatov I’m a technical lead at HubSpot based in Dallas-Fort Worth Metropolitan Area. When I have time, I enjoy working on SaaS products and writing programming articles at https://isamatov.com.

Recent posts:

Developing Web Extensions With Wxt

Developing web extensions with the WXT library

Browser extensions are an important part of the web ecosystem. They make our lives easier and enhance our web browsing […]

Debjyoti Banerjee
May 24, 2024 ⋅ 8 min read
Bulma Css Adoption Guide: Overview, Examples, And Alternatives

Bulma CSS adoption guide: Overview, examples, and alternatives

Explore how Bulma CSS simplifies frontend development with its ease of use and customizable, responsive, pre-designed UI elements.

Timonwa Akintokun
May 23, 2024 ⋅ 10 min read
Using Mountaineer To Develop A React App With Python

Using Mountaineer to develop a React app with Python

Develop a React app with Python using the Mountaineer framework for building a simple app with integrated your frontend and backend database.

Rosario De Chiara
May 23, 2024 ⋅ 7 min read
Enhance CSS View Transitions With Velevette

Enhance CSS view transitions with Velvette

Velvette is a utility library developed to make working with view transitions easier.

David Omotayo
May 22, 2024 ⋅ 9 min read
View all posts

One Reply to "Write an audio visualizer from scratch with vanilla JavaScript"

  1. This was super helpful, but I noticed a slight error in the sample code under “Resizing the Bars” — the second loop requires some adjustments to actually render that half of the visualizer on page.

    I was able to get it working by:
    1. Resetting the value of x in between the two loops.
    2. Setting the X argument of the call to fillRect in the second loop to canvas.width / 2 + x.

    I see a different approach was taken as I examine the code further on in “Tuning the Performance”, which leverages two separate X values, but the result is the same.

Leave a Reply