Tal J-8

[Dencheg]

Oh my goodness, I can't do it. I mean, i'll stop playing U-no-lx if I buy this one (new toy factor), and I like U-no-lx. OMG :'(

[EvilDragon]

Nah you'll still use U-NO-LX because it's straightforward and uses less CPU. And also doesn't sound the same.

[Amram]

Maybe you guys needs J-8 XL .

[zvenx]

@waltercruz, there is now a 1.1.4. Although I don't see it listed in the fix list, I think the legato issue is now fixed.
Thanks for pointing it out.

rsp

[Garrincha]

Thanks for reporting this. The oscillators remain in that phase because they have exactly the same pitch. If you detune VCO2 they go out of phase as expected.
I tried this with my Jupiter 8 and it is the same. But i wasn't able to set the detune knob exactly to zero. So it starts to drift away when removing the sync. I will make some more tests...

VCOs on an analog synth are never phase-locked and have never exactely the same pitch unless you switch on "OSC sync". That's what "sync" is for.

What Funkybot's Evil Twin, EvilDragon and myself are talking about is the behaviour of two non-synced oscillators (pretty much the usual state on a synth). They are free-running from the point you switch the synth on. And they are never exactely phase-locked and have never ever the exakt same pitch. They don't even have the exact same waveform. And that is even before they begin to drift over time.

As soon as you play a note, the OSC is not started (at a given start-phase - say 0°), because it is already running. Playing a note opens the gate. That means a different start-phase everytime you play the very same note. And it also means a different start-phase for each oscillator. And it also means a slight drift in pitch with each OSC.

That is one important factor which makes a analog synth (or the emulation of it) lively, organic and fat. Now after loading J-8 seems to have free running OSCs, but they are absolutely identically pitched and the waveforms sound identically. That is not the case with a real Jupiter.

But I think apart from this we have a real bug with the sync here:
With an init-patch you get free-running (non phase-locked) OSCs. So in that state the J-8 is only missing a bit of detuning and passibly a bit of variation of the actual waveform.

But as soon as you switch on sync, the OSCs are phase- and pitch-locked - as they should - but when you switch sync off, they stay that way. And that's not what should happen. The OSCs should go back in free-running mode, non-locked and non-synced.

[zvenx]

So I just sync'ed up the Factory Default (turned Fine Tuning to Zero) and turned on sync, then turned it off, and sure enough it didn't' sound anyway different with sync off, as you said....

But I kept Cubase open and went about doing other stuff and came back to it 5 minutes later, and they had drifted, cause when I turned sync back on, I could hear the difference again.

rsp

[Garrincha]

Hmmmm that sounds like phases on it are then restarted with gate on. Supremely weird/super uncommon for VCO analogs...

It's 35 years since, but if I remember correctly, there was hard-sync and soft-sync in analog land. Soft-sync was a bit exotic and I only remember I touched a synth back then which had it, but I don't remember, what it was. Hard-sync was far more common.

Soft-sync is pretty similar to a phase-locked-loop, it trys to restart the cycle of the slave when it has a similar phase as the master.

So it might be that device has their OSCs phase-locked, but not with the effect of a hard sync (which means hard restarting at whatever phase and thus creates more obvious timbral changes.

[Garrincha]

But I kept Cubase open and went about doing other stuff and came back to it 5 minutes later, and they had drifted, cause when I turned sync back on, I could hear the difference again.

rsp

Now that is interesting. Seems like the drift is just a bit too slow. That should be easy to fix.

I played around with the init patch a bit (without even looking at the sync-button ) and I could get it to sound pretty much identically to DIVA. I needed to detune VCO2 quite a bit though. If Patrick could make the OSCs drift a tiny bit more in pitch, I think he would nail it.

[EvilDragon]

Jupiter 8 def didn't have soft sync.

[zvenx]

But I kept Cubase open and went about doing other stuff and came back to it 5 minutes later, and they had drifted, cause when I turned sync back on, I could hear the difference again.

rsp

Now that is interesting. Seems like the drift is just a bit too slow. That should be easy to fix.

I played around with the init patch a bit (without even looking at the sync-button ) and I could get it to sound pretty much identically to DIVA. I needed to detune VCO2 quite a bit though. If Patrick could make the OSCs drift a tiny bit more in pitch, I think he would nail it.

Except.. I think he is saying this is how his Jupiter actually behaves.
(btw it might have been even more than five minutes, I was multitasking so didn't' exactly time it precisely)
rsp

[Garrincha]

Jupiter 8 def didn't have soft sync.

Yeah, I know, but the guy was talking about a SH-2. While I know the Jupiters pretty well from long-time experience I pretty much have absolutely no idea of SH-1/2. Never used one (at least I can't remember). So I thought they might have soft-sync of some sort or phase-locked OSCs.

[EvilDragon]

He also did say "But i wasn't able to set the detune knob exactly to zero"...

[Dalle]

Switching on the chorus seems to produce some DC offset.

[EvilDragon]

Jupiter 8 def didn't have soft sync.

Yeah, I know, but the guy was talking about a SH-2. While I know the Jupiters pretty well from long-time experience I pretty much have absolutely no idea of SH-1/2. Never used one (at least I can't remember). So I thought they might have soft-sync of some sort or phase-locked OSCs.

SH-2 actually didn't have sync at all... there were aftermarket mods for it.

[Kees49]

Oh and here's another bug. Seems like J-8 doesn't want to play a note starting from the very beginning of the project in Reaper.

During recording J-8 will not play the notes at the first beat.