A wonderful synth. One of my very few main everyday synths. Tons of possibilities just with the tree oscillators (plethora of waveforms + ability to use SF2 soundfonts in EACH of the three oscillators + tons of mathematical algorithms of modulations between them) even before entering into the filters... which are or many types and themselves able to use many complex modulations. A very underrated synth.
About the vintage ('classic") waveforms embedded in this synth it is good to know that the Aeterphon is simply the original name of the Theremine. Léon Thérémine (who was French from Russian origins, named Lev Theremin for the Russians) never used the word "theremine" for his instrument. He named it the "Aeterphone"... to directly recall the impression of "sounds from the Ether". It is when the copyrights were sold to the firm RCA that RCA decided to rename the instrument under the name "RCA Theremin", the physician Albert Einstein having brought the proofs, the scientific evidence that the Ether didn't exist and that this word "Ether" was to forget energetically. Starting from this day the instrument began to be worldwide known under the product name 'Theremin" (or 'Theremine' for the French market) in the RCA catalog. And the name "Aeterphone" disappeared definitely and definitively at Leon Thérémine's death.