Re: VU meters on LCD


Richard Sloan wrote:
> I am having difficulty displaying nice VU meter on a character display,
> right now I have allowed for 8 segments per channel, which I may make into
> 40 as you get 5 dots across per character.
>
> Now the issue is the bars and very jumpy, either showing a couple or all of
> them....
>
> I sample the audio every 1/10s and display the bars, I can sample more, but
> refreshing the display at a high rate is hard due to the fact I need to keep
> streaming MP3 data and can not miss any.
>
> I also know audio is more logrithmic than what I am doing...
>
> The difference from the softest to loudest on the ADC right now is 80
> counts.
>
> I would think I could make a nicer looking VU meter that "follows" the music
> better.
>
> Any thoughts?
>
> Thanks,
> Richard.

I agree with Hans, you need to do some signal conditioning before you
sample. Try searching for audio circuits you should find something
somewhere.

.

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