24x16 LED Audio Visualizer using MSGEQ7

Projects General Guidance
1

Hello friends,

I am very new to Arduino and learning from the scratch. I just did few projects and now want to concentrate on Audio Visualizer project.

I have seen one video on youtube and wanted to know how to achieve this effect.

I have build a 40LED 10 band equalizer without micro-controller but that the circuit has way too much components and is huge. So now I want to build it using Arduino. Specially the scope effect.

I know that MSGEQ7 has 7 Freq band, but I am not getting how to get the scope effect on screen. I am also confused how some people build visualizer using MSGEQ7 with more then 7 band.

Would really appreciate some help.

Thank you,
Best regards,
NS

2

Hi

John Boxall at Tronixstuff wrote this tutorial on how using these with an Arduino is a relatively simple way of creating a spectrum analyser. To get the scope effect on the screen you'd need to write your code to output some kind of bargraph representation per frequency and display only the peaks of that. That part would be dependent on your particular screen, and what kind of effect you were looking to create.

As far as I understand it the frequency bands are hard coded on that IC (for details : the datasheet), so if you've seen more than 7 bands I'm presuming it was stereo left and right with 2 MSGEQ7 ICs to give 14?

Cheers ! Geoff