I will be building an ADAT plate MIDI connector plate

[tlaskows]

for somewhere around 10$ in parts. So if you're missing this one and have an ADAT plate with 2 MIDI ports, stay tuned! I will provide the pinouts (have an old analogue scope) and pictures. Need more hardware MIDI ports. I don't trust those USB ones.

Danke schön,

-Tom

[dante]

Cool - will add to ScopeRise

[tlaskows]

It will be a couple weeks or so. The 'cheap' parts are coming from China :d

-Tom

[tlaskows]

Hmm,

The parts are arriving here slowly. I am just looking for some really thin 3 conductor cable (I don't think shielding is necessary for this cable length).

Cheers,

-Tom

[tlaskows]

Almost everything is here. Still waiting for the 6 MIDI female connectors.

In the meantime I should test my Tektronix. I don't think it was triggering when I used it last time. I probably fried it

-Tom

[tlaskows]

Having a little bit of a problem.

I totally forgot that MIDI uses current, not voltage. How do I determine which pin is the current source and which one is the sink?

jhulk?

Thanks,

-Tom

[tlaskows]

Well, I found the MIDI out pins... by experimentation.

Found both of them.

I have the M3 controlling the DX7s. What is really weird, the DX7 sound better played from the Korg than from itself! It probably has to do something with the DX7 only sending up to 99 velocity max.

Pretty pictures:



-Tom

[tlaskows]

Seems to be impossible to find MIDI in, hmm.

My yamaha is playing a sequence so it's sending MIDI (I checked on my oscilloscope). I tried various pin combinations. Only took me around 15 minutes to find MIDI out! I think I've been trying different combinations for almost 3 hours

-Tom

[Bud Weiser]

I have the M3 controlling the DX7s. What is really weird, the DX7 sound better played from the Korg than from itself! It probably has to do something with the DX7 only sending up to 99 velocity max.

What´s "better" ?
The DX factory (and most other) patches are programmed to work w/ that velocity range.
Much higher velocity values than 105+ deteriorate sound quality of these patches,- but I remember, in a specific project, I also used it as a feature to create insanely agressive sounds.

Bud

[tlaskows]

I am not sure ahahaha. They sound louder for some reason. Must be different velocity curve.

BTW, back to basics. Took off the plate and used a $10 multimeter to find the pins. Found the pins! But will they work?

-Tom

[tlaskows]

Found the MIDI in pins in about 15 minutes including taking out the card and putting it back in then testing both inputs.

Great success. But now it's time for green tea with my friend and maybe some Mario...

-Tom

[garyb]

Dante has the pinout on ScopeRise, too....

[tlaskows]

Not for the ADAT plate, I couldn't find it anywhere!

This pinout is quite different than all the other plates.

-Tom

[garyb]

oh, 24 ADAT plate?
you should post the pinout for posterity...

[tlaskows]

Still working on it. Just gotta find/trace the MIDI thru from the optocouplers

I've been up too early again, so now it's relax time.

I will have the whole complete project and drawing hopefully soon enough...

-Tom

[tlaskows]

This is the plate I am talking about. Haven't really seen these around. You can clearly see the two optocouplers, it's it's definitely got 2 MIDI ins.



Anyways, I am stuck right now, because my female MIDI connectors are not here yet. So no easy way to test MIDI thru.

-Tom

[garyb]

24 ADAT is the name of the plate.

[tlaskows]

Ok cool

-Tom

[tlaskows]

The final parts are here boys. The 6 MIDI female connectors. I shall spend a few minutes today to find the MIDI THRU outputs. But I am not sure how much time I will get to do that. It only took a month and a half for these to get here from HK. Buy hey, 5$ CAD with shipping for 6 connectors

-Tom

[tlaskows]

All the pins found. I will not post the pinout yet until I solder all the cables and double check.

Here's a little sneak preview of my debugging skills:



Cheers,

-Tom