ESP OPL

melan
Participants	Melan
Skills	Arduino, Programming, Python
Status	Production
Niche	Music
Purpose	Fun
Tool	No
Location
Cost
Tool category	Electronics

melan

Opl2 board.jpg {{#if:No | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:No | [[Tool Cost::{{{Cost}}} | }}

Intro

I still have a OPL2 board laying around that I wasn't using for anything at all. Dreamer came up with the idea of using it as a theme song player for when members enter the space. Of course, it has to be IoT.

OPL2

The OPL2 is a FM-synthesizer created by Yamaha, and was widely used in a lot of sound cards and several arcade games. It has 9 channels, or 6 channels when you are using the 5 percussion instruments. The chip has a characteristic sound due to how it produces the waveform.

For more information on the chip, check out the Wikipedia article.

Using

• ESP8266 (Wemos D1 mini)
• OPL2 Audio Board

To-do

• Replace the LM386 (op-amp) with a new one as the current one seems to be broken. New ones ordered from France
• Perhaps place everything on a PCB?
• Look into adding a cap between VCC and GND to get rid of some hum
• Write a UDP protocol for directly interfacing with the registers of the synth (So it can actually play DRO)

Code (git)

SOON.