This is the horizontal version of WavetablePi. It 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.
An assembly guide can be found here.
- 5.25 drive bay faceplates (by Michael Swimm) https://www.thingiverse.com/thing:6652143
- This version also includes headers for the mt32-pi buttons and rotary encoder.
The gerber can be found in the releases
| 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 |
| 2-pin 1x2 pin male header 2.54mm pitch | 4 | (Optional) Headers for mt32-pi buttons |
| 5-pin 1x5 pin male header 2.54mm pitch | 1 | (Optional) Header for mt32-pi rotary encoder |
| Jumper 2.54mm pitch | 2 | Jumpers for the audio selection header |
| Capacitor 10uF through-hole ceramic | 2 | |
| Capacitor 100nF through-hole ceramic | 2 | C3 and C4 which form the PWM audio low-pass filter along with R3 and R4. 100nF is for a 1.6KHz cutoff frequency. Use lower values for higher cutoff |
| Resistor 22K Ohm | 1 | |
| Resistor 10K Ohm | 1 | |
| Resistor 1K Ohm | 2 | R3 and R4, which along with C3 and C4 form a low-pass filter of the PWM audio |
| 0.91 OLED SSD1306 I2C 128x32 module | 1 | (Optional) |
| PCM5102A I2S DAC Module (aka GY PCM5120) | 1 | (Optional but highly recommended) Please check the PCB for the supported dimensions and form factor! |