Expat Audio Digital Control Boards in practice

Hello folks,

I've been wanting to develop a 9K mic preamp for quite a while now. (ever since I scored around 30 MAT02's!)
Since putting together the digital mic pre front end, and some of the digital relay cards, I thought all of it would come together nicely.

So, what you see below is not a finished product, but the start of a design that i'll continue posting on here.

Here's the front panel.


Maybe a little close up


The obligatory pron picture
\\


and the explanation...

Four sets of buttons, all using the same button cards. (http://www.expataudio.com/expatshop/index.php?act=viewProd&productId=6). Two of the cards use 3 buttons, while the two cards in the middle are populated with 2 buttons each.
The ones controlling the phantom, polarity and pad are all directly connected to the digital mic pre front-end boards.

The 4 buttons in the middle are open for creativity.  ;D
Here's my attempt at mapping them so far
- Link Gain to left channel
- Analog power on/off (digital rail eats little power)
- Re-Amp On/OFF (Reamp i/o will be on the back panel).


Anyway, late here... just thought i'd post. youtube will be up soon too.

next steps are to order the parmetal 1U box, and get the mic pre boards, digitally controlled mic-pre front end and relay cards done.

Oh cool, I like it! The color scheme is neat - it kinda takes a black/gold "this is serious" style and compliments
it with funky stuff - probably not even that easy to pull off if you had to do it on purpose.

What do the buttons in the middle do?

(Aha. Maybe I should read stuff more attentively...too much PCB desgin going on here, brain is spaghetti)

Hello Lukas, thank you for your feedback!

livingnote said:

Oh cool, I like it! The color scheme is neat - it kinda takes a black/gold "this is serious" style and compliments
it with funky stuff - probably not even that easy to pull off if you had to do it on purpose.

Click to expand...

It was a 50/50 accident. I chose gold, because I don't see that many people on the forum using it.
The LED's etc are PB613's from highly electric. A little on the expensive side, but I love the feel of them.

livingnote said:

What do the buttons in the middle do?

(Aha. Maybe I should read stuff more attentively...too much PCB desgin going on here, brain is spaghetti)

Click to expand...

Yeah, I'm still struggling with that one. Linking the gain is an important one.
I may do an output HI-Z mode (mute with Hi-Z) - so that multiple mic pre's can share the same line input.
Also, high-pass is an option, now that I know what my input impedance will be (based on the SSL9K).

Any thoughts?

/R