posted 24 January 2002 01:47            

voice_mod_fm_drone.kym

The attached sound includes a synth named "Hot Nuc" that demonstates just this... It uses a shaping wavetable fed by a sine wave oscillator. The coefficients of the polynomial in that wavetable were derived from the Tchebyshev coefficients that represent the fundamental and harmonics up to order 10.

A sinewave oscillator at full amplitude driving a sum of Tchebyshev polynomials generates harmonics in direct proportion to those Tchebyshev coefficients. By spectrally analyzing the light curve, I derived the amplitudes for those harmonics. Those amplitudes are the Tchebyshev coefficients.

The waveform is strongly reminiscent of a pure sinewave accompanied by a squarish-wave spectrum at twice the frequency of the sinewave. Only the fundamental and all even harmonics of it exist... Interesting!?

The sound is a very pleasant sound, much like an electric piano... There are many other stellar light curves that could be turned into wavetables. Eclipsing binaries, and even semiregular intrinsic variables would have very different sounds.

- DM

[* Actually, this is the sound of a rapidly rotating cool star next to a companion star that erupted briefly with a very hot flash, warming the cool star on one side. ]

posted 24 January 2002 05:11            

Now we know that the Universe is a shape of Cyan - which somehow the Warrior Princess already knew, we might now soon know what the universe sounds like too.

What do you suppose the cyan shade translates to in Hz terms? Hopefully not C3 hz!!

To paraphrase...
"In space no one has any colour sense or perfect pitch...(can you hear yourself in space?)