If the PCB gets a little bit smaller in a future revision, it'll even fit inside a stock DB25 shell. 😀

I’m really looking forward to this one. Thank you for great work

OK more stock arrived, I will be testing and packing this weekend.
OPL3LPT now available in the webshop, and through PM : https://www.serdashop.com/OPL3LPT
As a launch promotion I can offer you free 3d printed cover.

I like the OPL2 Case more 😀 Short circuit protection on the bottom 😁

Very good, please continue your work.
Whats next ? 😁

Awesome. Will definitely grab one of these my next order. Hoping the Tandy card is next, as I have some code I want to test on it. 🤣

Could people that have OPL3LPT running, report back if it works fine on their PC's, and tell me which systems you tried ?
It should work fine with the same tools as for OPL2LPT.
(we are working on some OPL3 specific patches for some games)

dreamblaster wrote:

Could people that have OPL3LPT running, report back if it works fine on their PC's, and tell me which systems you tried ?
It should work fine with the same tools as for OPL3LPT.
(we are working on some OPL3 specific patches for some games)

Hello! I received the OPL3LPT today, but unfortunately the line(power) noise is more audible than the actual FM output (even at full volume). 😢 The line noise is there whether or not the USB power cable is connected to the OPL3LPT. The machine I'm testing on is a Pentium 3/450 MHz machine, the motherboard is an ASUS P2B board. Is there anything that can be done to remove the line noise? I have an OPL2LPT and it doesn't exhibit this problem.

OPLx wrote:

Hello! I received the OPL3LPT today, but unfortunately the line(power) noise is more audible than the actual FM output (even at full volume). 😢 The line noise is there whether or not the USB power cable is connected to the OPL3LPT. The machine I'm testing on is a Pentium 3/450 MHz machine, the motherboard is an ASUS P2B board. Is there anything that can be done to remove the line noise? I have an OPL2LPT and it doesn't exhibit this problem.

Hi,
do you have a 3d printed enclosure on your opl2lpt ?
--> The description sounds like the ground of the line out is not connected : Maybe the shape of your 3.5mm connector is too thick to fit through the 3d printed enclosure completely ? Maybe you have a different cable to use ?
Could you try the board without the enclosure, and fully insert the 3.5mm connector, see if the problem remains ?
Please let us know if this solves the problem.

All OPL3LPT boards were personally tested by me, on my setup. So I hope this can be resolved. I'm here to help if you have any issue.

dreamblaster wrote:

Hi, do you have a 3d printed enclosure on your opl2lpt ? --> The description sounds like the ground of the line out is not conn […]
Show full quote

OPLx wrote:

Hello! I received the OPL3LPT today, but unfortunately the line(power) noise is more audible than the actual FM output (even at full volume). 😢 The line noise is there whether or not the USB power cable is connected to the OPL3LPT. The machine I'm testing on is a Pentium 3/450 MHz machine, the motherboard is an ASUS P2B board. Is there anything that can be done to remove the line noise? I have an OPL2LPT and it doesn't exhibit this problem.

Hi,
do you have a 3d printed enclosure on your opl2lpt ?
--> The description sounds like the ground of the line out is not connected : Maybe the shape of your 3.5mm connector is too thick to fit through the 3d printed enclosure completely ? Maybe you have a different cable to use ?
Could you try the board without the enclosure, and fully insert the 3.5mm connector, see if the problem remains ?
Please let us know if this solves the problem.

All OPL3LPT boards were personally tested by me, on my setup. So I hope this can be resolved. I'm here to help if you have any issue.

I just tried it without the enclosure and it works perfectly! 😀 Thanks for the suggestion; it didn't occur to me that that would be the cause.

I am very glad it is solved.
To use you enclosures, if you don't have a different cable, maybe you can enlarge the hole a bit ?

Alternatively a cheap extension cable can bring an elegant solution ? (for example this 1 euro one)
https://www.ebay.de/itm/3-5MM-Audio-Aux-Headp … -X/283041142144

Thanks for the suggestion! I pushed the 3.5mm connect a bit more closer to the case and that seems to work (for now). If the line noise happens again, I'll just make the hole a bit larger. Thanks for making such wonderful products! 😀

Quick test of OPL3LPT Mod for Adlib Tracker 2 : https://youtu.be/vu4S40F7Ptk
Supports native OPL3 support, so stereo sound 😀

For OPL3LPT users, wanting to try real opl3 mode music,
here's a zip file of the Modified Adlibtracker II DOS version, as it works on my DOS PC :

(this version only works for opl3lpt), not opl2lpt)

I did more recordings with OPL3LPT and adlib tracker :
FM63B_RV : https://youtu.be/-uZWNwA08Hk
1942 : https://youtu.be/s1WhzKOFTOk

I've added support for OPL3LPT to SBVGM. It can be downloaded from this link: http://www.oplx.com/code/
Some VGM data can be found here: Packs using YMF262

Please enjoy! 😀

I tested OPL3LPT on my Compaq Contura Aero 4/33C :

486SX@33 Mhz
20 MB of RAM
MS-DOS 6.22

OPLx wrote:

I've added support for OPL3LPT to SBVGM. It can be downloaded from this link: http://www.oplx.com/code/
Some VGM data can be found here: Packs using YMF262
Please enjoy! 😀

This works wonderfully ! Thanks !!
I recorded a demo : https://youtu.be/7vu-2HyxCtE

dreamblaster wrote:

OPLx wrote:

I've added support for OPL3LPT to SBVGM. It can be downloaded from this link: http://www.oplx.com/code/
Some VGM data can be found here: Packs using YMF262
Please enjoy! 😀

This works wonderfully ! Thanks !!
I recorded a demo : https://youtu.be/7vu-2HyxCtE

You're welcome! Thank you for making awesome hardware! 😀

The new adlibtracker II build for opl3lpt can be found here : https://github.com/pdewacht/at2lpt/releases

I added OPL3LPT support to my user mode OPL3 MIDI driver via inpout32.dll. I don't have an OPL3LPT, so can one of you install the driver to test it?
Here is how to test it.
You need inpout32.dll in C:\Windows
To enable OPL3LPT support, set oplhwsupport environment variable to "-lpt".
Enter the I/O address for the port in hex in the lptport environment variable for example "378".
The source is on github.
https://github.com/datajake1999/OPL3EMU
Edit: If it works, please post a recording of clouds.mid played on the Windows driver.