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[Gleix]

So I'm getting together everything I'm going to be doing with this drum machine. This'll be my most thorough project and a real piece of work, but should be worth it.  It'll be set up on a big wooden casing with the TR-626 at a slant and in front of it will be a big metal panel with the following:

34 point patch bay (banana)
8 points connected in groups of two for multiple connections (don't have stackable jacks)
Patch control center (able to link up 10 patches with a switch and a button for easy access to favorites)
Kill switch and volume knob for Bass drum, Snare, Hihat, Toms and Crash/ride cymbals
8 Switches for kit switches
12 switches for neat "fills" I found poking around that changes the rhythm.
4 1/4" audio outs that output squarewaves in different octaves


Here's a quick photoshop mockup of what it'll look like completed including my panel layout:



Does anybody have any suggestions? If there's anything else worthwhile I could stick in the big "626" area on the panel I'd like to hear about it - I couldn't find any stable pitch connections.  A few that wouldn't work with pots, just switches. 

[Gordonjcp]

ZIF ROM socket in the panel, and a switch to toggle between internal and external ROM.

[LoFi-Ninja]

Are you sure there's not a crystal clock on there ? Also on the 505 you can pitch the drums individually maybe it work's the same way ?

http://burnkit2600.com/gear/tr-505/#pitch

Have you read all the way thru this ? There alot of gold in the comments

http://burnkit2600.com/gear/tr-626-rhythm-decomposer/

[Gleix]

Are you sure there's not a crystal clock on there ? Also on the 505 you can pitch the drums individually maybe it work's the same way ?

http://burnkit2600.com/gear/tr-505/#pitch

Have you read all the way thru this ? There alot of gold in the comments

http://burnkit2600.com/gear/tr-626-rhythm-decomposer/

I'm not sure about the clock - but yes, I had read through that page. I picked up lots of pointers from burnkit and all the comments. I am gonna add a pitch down switch I've found, but I haven't found a pitch up that effects every sound or doesn't change the rhythm.  I'll probably steer clear of individual pitch mods since I don't think I'd use that much.

When I get home I'll try testing R39 on the 626. It's a pitch resistor in the 505, maybe it's the same? The two machines are very similar.

[LoFi-Ninja]

Are you sure there's not a crystal clock on there ? Also on the 505 you can pitch the drums individually maybe it work's the same way ?

http://burnkit2600.com/gear/tr-505/#pitch

Have you read all the way thru this ? There alot of gold in the comments

http://burnkit2600.com/gear/tr-626-rhythm-decomposer/

I'll probably steer clear of individual pitch mods since I don't think I'd use that much.

Are you serious ?? You don't want to be able to pitch down the bass drum for some rumble ? Or the hihats for some synthi sounds ? Also on burnkit they say it's possible to create a bassline with some bends.. I think some pitching would be nice for this !

[Gleix]

Would there be any risk replacing the 6AA battery holder with a simple 9v battery clip?  Or running a 9v battery into the DC power jack?

[deathbender]

The 9v block just won't last as long as the 6 AA cells.