I like the Midi Blaster: looks like a bunch of ROMs with Creative Stickers on them. Besides the 74 series ICs the other ones are probably Waveblaster ICs? I guess the device is from the early SoundBlaster 16 era?

I can only offer a screengrab from my SC55 video:

I would have to open it again to make a better pic. 😀

Reminds me, I have some photos of my SC-55 and MT-32 when i modded them with internal PSU's. 😀

1. Roland Sound Canvas SC-55

2: Roland Multi Timbre Sound Module MT-32

Version 1, with battery-backup modification

Version 2, as simple as it can get

Version 3, the one I have in use for many many years now

Internals of Korg NS5R:

I uploaded some pics to Imgur a few years ago.
Kawai GMega https://imgur.com/a/5sj5I
Yamaha MU15 https://imgur.com/a/tFSGf
Korg 05R/W https://imgur.com/a/EdXQY

Salient wrote:

Internals of Korg NS5R: http://members.ziggo.nl/salient/vogons/NS5R/Korg%20NS5R%20Internals.jpg […]
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Internals of Korg NS5R:

By the way on your homepage you put the wrong photograph online for the NS5R! (you linked the Emu Soundengine)

Salient wrote:

1. E-Mu Sound Engine (1993 version) http://members.ziggo.nl/salient/vogons/Sound%20Engine/E-MU%20Sound%20Engine%20Music%20Module […]
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1. E-Mu Sound Engine (1993 version)

Interesting to compare yours to mine (I rotated so same orientation).

Interesting to see date code variations on the '93 board, your AD dac is a '92 mine is a '94 etc. You have some bodge resistors in the bottom right and the power on top left on mine is different, and no bodge resistors

I see it now. I'll change the image on the website.
There are indeed some differences. That with the resistors.... Could it be that it is a left/right channel swap? I have an early version of the roland scb-55 and it has a somewhat similar factory mod for swapping the channels.

Hate to bump a thread that's over 6 months old, however, for your Roland MT-32 battery backup mod, do you have a schematic for version #3? I'm planning on doing that for my Roland MT-32 so I can install Blue Ridge ROMs.

I believe the battery backup mod was only published for the early rev non-headphones. it is, imo, not worth doing and the blue ridge roms dont bring anything to the table. All the mt32 motherboards have I believe 4x 6264 8kb SRAMS. Someone could probably easily make a daughter board to replace the 4 6264 8kb SRAMS with NVRAMs instead of messing with batteries... shrug. This way you dont need to cut traces on the board and such.