[music-dsp] VU level -> colour?

[Ross Bencina]

Thanks to everyone for their helpful replies..

Alistair Milne wrote:
> In addition to the other replies, something you might want to consider is 
> whether you map the colour range to raw signal intensity, or to 
> log(intensity) i.e. decibels.

Agreed. I've been playing with drawing antialised circles of different 
sizes, and a log scale is definitely going to be helpful for this.

> In the end, it depends what you are trying to achieve by having a VU 
> meter.  Are you trying to tell a user when the mix is getting too "hot", 
> or are you just trying to provide eye candy.

Well eye candy is certainly part of the goal, but ideally I want to indicate 
signal presence, and signal level. There will be multiple indicators for 
different signals, so relative level will be just as important as peak/hot 
level indication.

Bests

Ross.