Alternatives for MV8-OP1 (Hacking project.)

[Seccione]

Hi guys,

Out of frustration for not being able to find a MV8-OP1 board, I started thinking of using some other output board as a replacement.

I haven't found full schematics for the MV8-OP1, but based on the clues in MV-8800 service manual, I have kind of an idea what to look for.

So, I peeked at the schematics of SP-808, and it looks like it's SP808-OP1 might be compatible with MV, with just a small tweaks. (DAC clock speed, cabling)

I made a topic to Gearslutz about my findings, but no one seems to be interested. :D


Has anyone here tried something similar?

Is there any other output expansion boards (from Roland) that could be investigated?

All input appreciated!

[JUKE179r]

I'll continue following your progress Seccione. Good Luck!

[Seccione]

Cheers, mate!

Relieved to see that I'm not the only one without the expander... :/

[waxdat]

I would start at getting a digital input to work. If you can get that to work then you can move on. The digital/optical input is the most important part of the MV8-OP1.

[Seccione]

Digital input is challenging, because I don't the specs how MV8-OP1 does it.
I'm certain that the sync clock in SP808-OP1 is configured differently, but without schematics for MV8-OP1 it's about rolling dices.

Analog multiouts are relatively simple to get working, so I'll treat that as a 'proof of concept'.


Once ("if") I get something working, it should be easy to get the rest. Maybe.

[Seccione]

Ok, I actually got this working!



The strange wire-thingy on the top-right corner is the modification I had to make to configure DA converters to be compatible with the MV. :D

Now I have 6 extra output in my MV, and I paid like 90€ for it!

At some point I might check out if I could get the digital i/O to work, but those analog outs was the thing I was looking for.

[JUKE179r]

Duuuuuuuude! You Rock! Good Job Seccione!

[waxdat]

That's some serious surgery there Doc. Good shit!

[Jack TripHop]

This is REALLY cool!!!

[JUKE179r]

Here you go Seccione… Merry Christmas…

Manual - MV-8000 SM MV8-OP1.pdf

[Seccione]

:O Omg, where on earth did you find this? I was sure I searched the whole internet for this!

Thank you for sharing this!

[Blakk_Heart]

It looks like the only shot I have at getting this feature for my MV 8800 hinges on how successful you are with this hack. Good luck.

[Seccione]

As mentioned above, the analog outputs are already working.

I haven't had time to work this further, but the next thing I'll do it to make the 'hidden' third MIDI-output somehow usable.
(I'm using my MV as the master sequencer to control other gear.)

[Blakk_Heart]

You don't think you'll take a shot at the digital input? That's the goodie in my opinion.....

[DJFLEX-mk2]

**YAY** !!!
Thanks to by JUKE179r » Fri Jun 05, 2015 6:44 pm
**FOR THE PDF ~ SERVICE NOTES: MV-8000 & MV8-OP1_SN - NOV.2003**

Manual - MV-8000 SM MV8-OP1.pdf

THANK YOU VERY MUCH !!!!!!!!!!!!!!!! :)