Rhodes Chroma Polaris

> From: steven
> 
> I am wondering about what the mod lever on the polaris 
> actually does.  it seems to engage the sweep (lfo) at the 
> rate that the  sweep lever is set. but is its 'detination' 
> [to use a modern term] the filter cutoff---or filter 
> envelope? or what??   so then,  it adds the sweep rate to the 
> filter--- at the 'level' set by the assignable control--- and 
> how does this differ from the 'vibrato' that also seems to be 
> adding this  LFO at this  single set rate?

In arithmetic terms:

pitch1 = key + transpose + lever2 * bend_lever_range 
+ sweep * (osc1_vibrato * delay_envelope + lever1 * mod_lever_range)

pitch2 = key + transpose + lever2 * bend_lever_range 
+ sweep * (osc2_vibrato * delay_envelope + lever1 * mod_lever_range)

So you can see that it applies vibrato to both oscillators equally, and has
nothing to do with the filter.

> I have other more 
> modern synths that allow you to assign the mod wheel to many 
> parameters--so im wondering what does this control do on the 
> polaris in 'modern' terms .  I kinda wish it did more--or 
> could be modded to have more or more intense  actions. it 
> seems to have a fairly limited scope compared to my other 
> synths.  any comments/ explainations?  

There's also a less modern synth that lets you do this: the Chroma.

-- 

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...