Jup4
- Thread starter murc
- Start date
maxdox
rode peper en knoflook
Alhoewel ik het belachelijk vind dat die prijzen zo snel omhoog lijken te schieten, is de jupiter 4 altijd onderschat geweest. Het ding kan zich best meten met de andere vintage (mono) synth klassiekers, terwijl om een of andere reden dit nooit in de loop der jaren zo in de prijs was te zien.
elektrovolt
compuphonic
Origineel geplaatst door JugJug
En voor hoeveel zou je hem weer wegdoen?
HELEMAAL NIET !
smackos
Gepokt en gemazeld
Ja dat komt omdat iedereen denkt dat het een preset-orgel achtig geval is
elektrovolt
compuphonic
Roland had eigenlijk een jupiter-4 met ingebouwde cr-8000 moeten uitbrengen... helemaal over de top
- Lid sinds
- 11 januari 2003
- Berichten
- 14.508
Origineel geplaatst door elektrovolt
Roland had eigenlijk een jupiter-4 met ingebouwde cr-8000 moeten uitbrengen... helemaal over de top
rs 202 ? strings erby ,.........leuke dual klavier combie ...met ritmus box
yamaha heeft toch die quasie organ/synth /string bakken sk serie
bets leuk koopje voor praktish niks
sk20/sk30 en d8 ik sk40 = d8 ik 3x klavier
sunny pedaal
ALL (Anna Loog Lid)
mmm, wel presets/memories maar verder wat eenvoudig eenstemmig, heb liever die jp4 voor 300euro kan ook mooi gemodificeerd worden met extra in/outs.
Zomnius
Zom Lid
- Lid sinds
- 19 februari 2005
- Berichten
- 484
volgens mij heb je het mis kijkmaar: (wel leuk verhaal weer over die oude bakken)
The Synthesizer
The Promars has long been described as "a monophonic Jupiter 4" and in many ways this is a fair assessment. Indeed, much of the service manual and technical notes are common for the two instruments. But if there is one respect in which they differ greatly, it is that whereas the Jupiter 4 has one oscillator per voice, the Promars has two. So let's start here...
Like all the Promars' synthesizer circuits, the oscillators are true analogue devices. In other words, they are VCOs. Many people are confused as to how the oscillators in instruments like the Promars can be genuine VCOs when they are digitally controlled, but it is perfectly possible. The key point is that while the oscillator parameters are stored and recalled in digital form, the actual pitch is controlled by an analogue voltage. In a digitally controlled oscillator (DCO), by contrast, the pitch itself is controlled digitally.
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. Mind you, there's no reason why you couldn't build a bit of additional hardware to control VCO2 independently. It wouldn't be programmable in the sense of being stored in the patch memories, but it might be an interesting project for somebody who's a bit of a whizz with a soldering iron. Has anybody in SOS-landever done this?
een ideale basis voor een tweeking project
The Synthesizer
The Promars has long been described as "a monophonic Jupiter 4" and in many ways this is a fair assessment. Indeed, much of the service manual and technical notes are common for the two instruments. But if there is one respect in which they differ greatly, it is that whereas the Jupiter 4 has one oscillator per voice, the Promars has two. So let's start here...
Like all the Promars' synthesizer circuits, the oscillators are true analogue devices. In other words, they are VCOs. Many people are confused as to how the oscillators in instruments like the Promars can be genuine VCOs when they are digitally controlled, but it is perfectly possible. The key point is that while the oscillator parameters are stored and recalled in digital form, the actual pitch is controlled by an analogue voltage. In a digitally controlled oscillator (DCO), by contrast, the pitch itself is controlled digitally.
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. Mind you, there's no reason why you couldn't build a bit of additional hardware to control VCO2 independently. It wouldn't be programmable in the sense of being stored in the patch memories, but it might be an interesting project for somebody who's a bit of a whizz with a soldering iron. Has anybody in SOS-landever done this?
een ideale basis voor een tweeking project
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