Here is at least one recent owner.

libby wrote on 2022-07-31, 18:17:

found me a computer.,

music.jpg

I have one. I can post some high res photos.

See subsequent posts for various close-up photos. If there are any components you need better photos of, let me know and I can take more pics.

First batch of close-ups

Second batch of close-ups

Third batch of close-ups

Fourth batch of close-ups.

Fifth batch of close-ups

Shponglefan wrote on 2022-08-04, 20:26:

I have one. I can post some high res photos.

Thank you very much! Your photos have been very helpful to me. Most of the issues have been resolved.
There are only a few questions left that could not be seen.
Values of following units:
- Capacitors: C2, C3 and C4, C6
- Capacitor C67
- Resistor R35
- U3 - marking is applied very poorly and is not shown in any photo.
- resistors array: RA1 and RA2
Also interested in marking on a large disk capacitor С5 ((placed near the MIDI connector).
Near it is a similar disk capacitor: interesting its name and value.
There is no need to take pictures. It will be enough if you look at the markings of these parts and write in text.

scg wrote on 2022-08-05, 19:34:

Thank you very much! Your photos have been very helpful to me. Most of the issues have been resolved. There are only a few quest […]
Show full quote

Shponglefan wrote on 2022-08-04, 20:26:

I have one. I can post some high res photos.

Thank you very much! Your photos have been very helpful to me. Most of the issues have been resolved.
There are only a few questions left that could not be seen.
Values of following units:
- Capacitors: C2, C3 and C4, C6
- Capacitor C67
- Resistor R35
- U3 - marking is applied very poorly and is not shown in any photo.
- resistors array: RA1 and RA2
Also interested in marking on a large disk capacitor С5 ((placed near the MIDI connector).
Near it is a similar disk capacitor: interesting its name and value.
There is no need to take pictures. It will be enough if you look at the markings of these parts and write in text.

C2, C3:

103KY

C5, C70:

SR
104M
16V

C4, C6:

222
JA

C67:

16V 100uF

RA1, RA2:

RML S8 103J

R35:

U3:

Thanks for the comprehensive answer. I will try to process this information. I hope that I have no more questions about the components.

scg wrote on 2022-08-24, 19:53:

Thanks for the comprehensive answer. I will try to process this information. I hope that I have no more questions about the components.

Very excited for this! and thanks to @Shponglefan for posting those photos! As a kid I've never even SEEN the music feature card apart from a few blurry magazine photos. I've always seen the option on the setup menus for Sierra SCI games and wondered what it would be like to own one.

Preliminary version (pre1) of the IMFC scheme.
Now, only one thing remains unclear: what is the pin 2 of the resistor matrix RA1 connected to?
Almost completed PCB layout. As soon as I deal with the last issue, I will order the production of a test PCB.

Really cool project. Looking forward to seeing the first prototype, and I hope this eventually allows some more people to experience the card. Game support might be limited but it's fun to explore, and there are tools for musicians too like this: https://archive.org/details/mvle-imf

I've only been able to experience it in Yamaha FB-01 form, thanks to SoftIMFC.

scg wrote on 2022-09-04, 07:36:

Now, only one thing remains unclear: what is the pin 2 of the resistor matrix RA1 connected to?

Pin 2 of RA1 is NC unless this is a three layer board but I don't think it is.

libby wrote on 2022-09-05, 19:22:

Pin 2 of RA1 is NC

It turns out that I do not understand the purpose of the wire, which I marked in red in the photo. I assumed that one end of it is connected to pin RA1-2.

libby wrote on 2022-09-05, 19:22:

unless this is a three layer board but I don't think it is.

I assume there are four layers: signal-GND-POWER-signal. 😀
At least I don't see the ICs being powered through the outer layers.

In this photo, it looks like a wire is connected to pin 2 of the RA1.

DaveJustDave wrote on 2022-08-24, 21:53:

Very excited for this! and thanks to @Shponglefan for posting those photos! As a kid I've never even SEEN the music feature card apart from a few blurry magazine photos. I've always seen the option on the setup menus for Sierra SCI games and wondered what it would be like to own one.

To be perfectly honest, it's a bit of novelty item. It's not really well supported and even among the games that do support it (e.g. Sierra games), most of the music wasn't written for it. Consequently, a lot of the game music used by it just doesn't sound good, especially compared to something like a Roland MT-32 / LAPC-I.

On the other hand, there are some game soundtracks (e.g. Silpheed) which show that it is capable of decent-sounding FM synthesized music.

In a way it's a shame it wasn't better supported with proper game music written for it.

scg wrote on 2022-09-17, 19:50:

In this photo, it looks like a wire is connected to pin 2 of the RA1.
RA1-2_2.jpg

I'm assuming that pin pin 2 of the RA1 is connected to pin 13 U5. This doesn't make sense, however I can't explain the wire I've marked red in the picture above.
Can anyone check if this is true?