picovox available now !!
picovox is a sound card for parallel port, that can emulate several sound devices :

• Covox
• Stereo-On-1
• FTL Sound Adapter
• Disney Sound Source
• OPL2LPT
• OPL3LPT
• TNDLPT
• CMSLPT

The picovox project is designed by Jan Samek. 
This serdaco version of the PCB is developed in special agreement with Jan Samek.

picovox PCB specs :

• dimensions :  54mm x 47mm
• parallel port connector
• USB-C power connector
• 3.5mm stereo line out 
• optional 3d printed high quality enclosure

For up to date information, check out the pivocox open source project here

You can select the emulated device using pcvx.com

How do I use it?

You just need to plug your picovox into any LPT port of your computer, plug in the power to the USB-C connector and your favorite pair of speakers into the audio jack. In case of Covox/FTL/DSS/Stereo-On-1 you can use them right out of the box. In case of OPL2LPT, TNDLPT and CMSLPT, you can use them in the same way as the listed devices; either with games with native support, or load their drivers/patches. You can switch between modes via a tool for DOS called pcvx.com :

How to use PCVX.COM ?

You have to copy the pcvx.com file to your DOS computer.

You can download the latest version from RELEASES.

The usage is as follows:

PCVX [PORT] MODE [DEVICE]

PORT

You may specify the port by using LPT1, LPT2, or LPT3, depending on where your picovox is connected. If your picovox is connected to an LPT port at a non-standard address, you can use ADDR0x378 where you replace 0x378 with your base address (where data pins are set). The status register is base + 1, and the control register is base + 2.
 

MODE

DEVICE

Mandatory argument for SET. Specifies the emulated device.

Example usage

PCVX LPT1 SET COVOX – Sets picovox on LPT1 to Covox mode.

PCVX ADDR0x3E8 INIT – Initializes picovox on address 0x3E8.

PCVX STATUS – Shows current status of picovox.

PCVX HELP – Prints help.