Rhodes Chroma Polaris

On 2012-09-13, at 4:48 PM, "Paul D. DeRocco" <pderocco@...> wrote:
> > From: w.james.meagher@...
> > 
> > Two quick questions after having played my Polaris for about 
> > ten minutes since buying and repairing it:
> > 
> > 1. Is everyone else's headphone jack quite noisy?
> 
> Yes. A replacement output board that fixes the nasty noise problems in the
> Polaris should be available in the not too distant future.
> 
Damn, and I promised you I'd stop harping on about the replacement output board. Even knowing about the Polaris's noisy outputs I was a bit surprised at just how noisy my headphone output is. Once I get a replacement high output jack soldered in I'll be able to hear whether it's any better than the headphone jack.
> > 2. Is there a hardware reason (impossible by design) why you 
> > can't select Saw and Pulse simultaneously on a single 
> > oscillator, or is this merely limited by the OS programming?
> 
> When you select Saw, you are actually getting the saw plus the pulse. If you
> want only the saw, set the pulse width to zero. The saw and the pulse are
> combined such that they produce a shape that is equivalent to two
> phase-shifted saws added together. (A pulse can be thought of as two
> phase-shifted saws subtracted.) The result is the inverse spectrum of the
> pulse by itself. Set the width to midscale, and the pulse gives you only odd
> harmonics (a square wave), while the saws shape gives you only even
> harmonics (a sawtooth an octave up).
> 
Wow... I felt like this was maybe a stupid question, but I sure am glad I asked it. Either I was sleepy when reading it, or the OM didn't do a very good job of explaining this - but your explanation sure explains why my ears were contradicting my expectations while playing with the OSC settings.

Thanks again Paul!

Cheers,
James
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