Imported from GitHub: scrapcomputing/WavetablePiHoriz · commit 02b87b5 · license GPL-2.0

Description

The "horizontal" version of the WavetablePi

README

Horizontal WavetablePi

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.

Assembling the Horizontal WavetablePi (by sweetlilmre)

An assembly guide can be found here.

• 5.25 drive bay faceplates (by Michael Swimm) https://www.thingiverse.com/thing:6652143

New Features

• This version also includes headers for the mt32-pi buttons and rotary encoder.

Bill of materials

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!