WavetablePi is a wavetable module based on the Raspberry Pi Zero 2 W running mt32-pi. It is capable of emulating several midi synthesizers, including mt32, sc55 and general midi with custom sound fonts. For a complete feature list please refer to the mt32-pi project.

For controlling the mt32-pi from DOS, please use mt32-pi-control.

Features

It currently supports two modes of audio: using the raspberry pi's PWM audio out (which is noisy and sounds pretty bad), and an external Hi-Fi PCM5102A based DAC.
You can also attach a 0.91 OLED SSD1306 I2C 128x32 display.

I want to build one myself!

Please note that the current version of the WavetablePi board is quite tall (76mm x 40mm) so please check if it fits your sound card, especially if it needs to be placed perpendicularly to the ISA slots.
Also please make sure that there is enough clearance between the WavetablePi and the sound card. Some cards have large components that may touch the raspberry pi a
A WavetablePi with the DAC or the OLED display takes quite a bit of vertical space, so you will end up wasting one ISA slot! There is just no room for a card right next to the sound card, as the OLED display and the DAC will be in the way.
Finally please check that the PCM5102A HiFi DAC is in the form factor that fits the board. The one I am using is approximately 32mm x 17mm. Also please check that the pinout matches.
For ordering the PCB, you usually just need to upload the zipped gerber files to the fab's website.

Bill of materials

Item	##	Description
Raspberry Pi Zero 2 W	1	The older RPi Zero is not fast enough
40-pin 2x20 male header 2.54mm pitch	1	For attaching the RPi to the board.
26-pin 2x13 female header 2.54mm pitch	1	For attaching the board to the wavetable header
6-pin 2x3 pin male header 2.54mm pitch	1	For the audio select jumpers
Jumper 2.54mm pitch	2	Jumpers for the audio selection header
10uF through-hole ceramic capacitors	2
Resistor 22K Ohm	1
Resistor 10K Ohm	1
0.91 OLED SSD1306 I2C 128x32 module	1	(Optional)
PCM5102A I2S DAC Module	1	(Optional but highly recommended) Please check the PCB for the supported dimensions and form factor!