I want to design a simple LED audio spectrum analyzer kinda like this.
Which method would be less expensive to do:
- Use many filters for each frequency band, depending on how much bands and LEDS I want to use
- Use a microprocessor to do FFTs
Clearly, doing FFTs will have a certain lag, but would that lag be significant enough to overcome the expensive of the many filters of the first bullet? Which method would be most power efficient? Or is this extremely dependent on the hardware? Any input is much appreciated. This is the first time I am taking on such a project, and I want to get as much feedback as possible. Thank you!!