What does it take to get ARP mode in Juno 66 fixed ?

Support and discussion of Tubbutec products.

Moderators: Kent, tubbutec

Post Reply
csiprophet
Learning to Wiggle
Posts: 22
Joined: Thu Sep 06, 2018 8:39 pm
Location: Las Vegas

What does it take to get ARP mode in Juno 66 fixed ?

Post by csiprophet » Mon Apr 29, 2019 3:14 pm

Hello tubbutec,

A few users have reported an issue with the Juno 66's ARP, which makes it works in a wrong and unmusical way, or at least very differently than how Juno 60 does:

- Set ARP to Up/Down and range to 3 octaves

- Hold C0, E0 , G0 (lowest octave), it plays:
C0 E0 G0 C1 E1 G1 C2 E2 G2 E2 C2 G1 E1 C1 G0 E0

These are 16 steps a loop. It's usable and sounds musical, and also as originally in the Juno 60.

- Now hold C3, E3, G3 (mid or top octave), it would play:
C3 E3 G3 C4 E4 G4 C5 C5 G4 E4 C4 G3 E3

This is a 13 steps loop, it's unmusical, can't really be useful and is not as originally on a Juno 60.

We've been waiting for a fix for many months now, would you be able to finally fix this minor issue for us, so we can get our ARP back to work as it should ?

Your support in your user-base is appreciated.

User avatar
tubbutec
Veteran Wiggler
Posts: 603
Joined: Sat Dec 27, 2014 4:29 am
Location: Berlin
Contact:

Post by tubbutec » Tue Apr 30, 2019 4:26 am

Just so we are on the same page.. how does the original Juno behave in this situation?

csiprophet
Learning to Wiggle
Posts: 22
Joined: Thu Sep 06, 2018 8:39 pm
Location: Las Vegas

Post by csiprophet » Mon Jun 24, 2019 4:47 pm

Hello Tubbutec, and sorry it took me so long to respond. I didn't have access to any other Roland than my modded Juno 66 up until today.

I was able to compare the Juno 66's behavior with a JP8, and found what the exact bug is:

- Set ARP to Up/Down, 3 OCT
- Now, if you play a C-E-G chord on the bottom octave, on the 66 it will arpeggiate correctly
- But if you play the same chord in higher octaves, where the 66 cannot play all 16 notes (as it reaches the top note too soon), then it would repeat the highest note once it reaches it, instead of playing it only once and move on to the next note

This works correctly on the JP8, but doesn't work correctly on the 66.

This wrong behavior makes the ARP play odd length patterns, such as 13 and 7 steps instead of 12 and 6 steps, which isn't musical and cannot really be used in a musical way...

So:

Playing a CEG chord starting at C3 on the keyborad, it currently plays for each loop:
C3 E3 G3 C4 E4 G4 C5 C5 G4 E4 C4 G3 E3 (13 steps)
- It doesn't repeat C3 when it goes back to it, but repeats C5 when it goes up to it.

It should be:
C3 E3 G3 C4 E4 G4 C5 G4 E4 C4 G3 E3 (12 steps)

The same way, if you play a CEG chord starting at C4, it currently plays for each loop:
C4 E4 G4 C5 C5 G4 E4 (7 steps)

When it should play:
C4 E4 G4 C5 G4 E4 (6 steps)

So basically it should not play the top note in the ARP sequence twice, before it falls back.

Note: This bug also happens in Up/Down, 2 OCT mode.

Would you please be able to fix this for us? the ARP is the heart of every Juno!

User avatar
tubbutec
Veteran Wiggler
Posts: 603
Joined: Sat Dec 27, 2014 4:29 am
Location: Berlin
Contact:

Post by tubbutec » Wed Jul 03, 2019 8:54 am

Thanks a lot for this detailed analysis.
Will take care of this :)


csiprophet
Learning to Wiggle
Posts: 22
Joined: Thu Sep 06, 2018 8:39 pm
Location: Las Vegas

Re: What does it take to get ARP mode in Juno 66 fixed ?

Post by csiprophet » Tue May 12, 2020 1:20 pm

Thanks a lot for the fix. I've updated the 66 with 1.27, however I'm not sure it went through, as the Juno doesn't show any sign while receiving the update nor it restarts once the update is completed, so I only assume it went well (is there a way to check what's installed?)

The original issue seems fixed, at least from a quick look I took at it. But now it created another critical issue...

- Set the ARP to Up/Down, 1 OCT
- Push any key
Result: The ARP plays: <key>, D#4, <key>, D#4, <key>, D#4...
Expected: <key>, <key>, <key>, <key>, <key>, <key>...
This is a regression issue and seems very critical.

- Set the ARP to Up/Down, 2 OCT
- Push the C4 key
Result: The ARP plays C4, C5, C4, C5... this works as expected.

- Now set ARP to Up/Down, 3 OCT
- Push the C4 key
Result: The ARP plays C4, C5, C5, C4, C5, C5, C4, C5, C5, C4..... (it repeats the top C twice)
Expected is: C4, C5, C4, C5, C4, C5, C4, C5.... This how the Jupiter 8 I checked behaves.

Also:

The J66 ARP seems to still produce uneven patterns, such as ones containing 11 notes instead of 12, and 15 notes instead of 16, when the top C key is involved (i.e played).

For example:
- With ARP set to up/down and OCT2, play F3, A3, C4, F4, A4, C5. The pattern will miss one C5 note and will play 15 notes per loop instead of 16:
F3, A3, C4, F4, A4, C5, F4, A4, C5, A4, F4, A4, F4, C3, A4
When it should play:
F3, A3, C4, F4, A4, C5, F4, A4, C5, A4, F4, C5, A4, F4, C3, A4

or:
- With ARP set to up/down and OCT2, play F3, C4, F4, A4, C5. The pattern will miss one C5 note and will play 11 notes per loop instead of 12:
F3, C4, F4, A4, C5, F4, C5, F4, A4, F4, C4
When it should play:
F3, C4, F4, A4, C5, F4, C5, F4, C5, A4, F4, C4

This is verified vs the Jupiter 8.

May you please be able to take a look at this and hopefully get it sorted?

Thank you so much.

User avatar
tubbutec
Veteran Wiggler
Posts: 603
Joined: Sat Dec 27, 2014 4:29 am
Location: Berlin
Contact:

Re: What does it take to get ARP mode in Juno 66 fixed ?

Post by tubbutec » Wed May 13, 2020 4:41 pm

You are correct, this broke the arp. Working on a fix.

At least in simulation it is now working and behaves the way it should. You can expect an updated firmware on Friday.

User avatar
tubbutec
Veteran Wiggler
Posts: 603
Joined: Sat Dec 27, 2014 4:29 am
Location: Berlin
Contact:

Re: What does it take to get ARP mode in Juno 66 fixed ?

Post by tubbutec » Fri May 15, 2020 5:44 am

1.28 firmware out now.. pretty sure it now behaves correctly

csiprophet
Learning to Wiggle
Posts: 22
Joined: Thu Sep 06, 2018 8:39 pm
Location: Las Vegas

Re: What does it take to get ARP mode in Juno 66 fixed ?

Post by csiprophet » Sun May 17, 2020 5:34 am

Hello Tubbutec, thanks so much. Taking a first look at this it seems these have been fixed. I will look deeper into this in the next few days and let you know if I find anything else.

Very much appreciated!

Post Reply

Return to “Tubbutec”