Hanz
Anonieme Analogist
Stond laatst een Promars te koop, ik dacht op Interface. Maar ik kan 'm even niet meer vinden.
Op papier is de Promars beter, want de architectuur van de Jupiter 4 maar dan met 2x VCO.
Maar die tweede VCO heeft behoorlijke beperkingen:
Daarbij, het is toch ook mogelijk om de Jupiter 4 monofoon te schakelen? Als je dan nog geen dikke monosynth hebt, weet ik het niet meer...
Op papier is de Promars beter, want de architectuur van de Jupiter 4 maar dan met 2x VCO.
Maar die tweede VCO heeft behoorlijke beperkingen:
So, the Promars has two VCOs. But where are the waveform and octave controls for the second? If you look at the 'Dual VCO' section of the control panel, you will find just one octave selector, one waveform selector, and one set of pulse width/PWM controls. Consequently, you could be forgiven for thinking that there is, in fact, just one oscillator with some kind of doubling trick concealed under the Promars' hood. The only nod towards the existence of the second oscillator is low on the far right of the angled panel behind the keys. If you look closely, you'll find two small knobs and a switch here. These purport to control the pitch of VCO2 (or turn it 'off'). So, what's going on?
The answer is weird. The primary oscillator (VCO1) is on the main synthesizer voice board; these boards are the same as were used for each of the Jupiter 4's four voices. The second oscillator, VCO2 (which the Jupiter 4 lacks) is an 'add-on' that plugs into the main board, and which mixes its signal with that of VCO1 before it passes to the VCF. Having added the second oscillator, Roland then cut corners and, in duplicating the bulk of the Jupiter 4's control panel on the Promars, left no space for independent control of VCO2. Furthermore, the Promars' software has no provision for the extra five parameters that it would need to separate the two oscillators.
Consequently, you must at all times have the same waveform, the same basic pitch, and the same PW parameters (with manual or LFO-driven PWM) for both VCO1 and VCO2. The only thing that you can control independently on VCO2 is its fine-tuning. This is unfortunate because it severely curtails the Promars' usefulness.
Daarbij, het is toch ook mogelijk om de Jupiter 4 monofoon te schakelen? Als je dan nog geen dikke monosynth hebt, weet ik het niet meer...



