Qwiic WAV Trigger Pro

Jargon buster

Plain-language definitions for the technical terms used above.

active LOW

Active LOW means an input is considered switched on when it is connected to a low voltage or ground. This matters when wiring buttons, switches, or other trigger signals so the board responds in the expected way.

I2C

I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.

line level

Line level is an audio signal strength intended for inputs on mixers, amplifiers, powered speakers, or recording equipment. It is not the same as a speaker output, so you may still need an amplifier to drive passive speakers.

microcontroller

A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.

microSD card

A microSD card is a small removable memory card used to store files such as audio tracks. For this product, the card is where the sound files live, so its capacity and formatting can affect how many sounds you can use.

MIDI

MIDI is a standard way for electronic instruments, controllers, and software to send musical control messages such as notes, velocity, and timing. If a board supports MIDI, it can be triggered from keyboards, drum pads, sequencers, or other music gear rather than only from buttons or code.

polyphonic playback

Polyphonic playback means the board can play more than one sound at the same time. This matters for installations or instruments where sounds may overlap instead of cutting each other off.

PTH

Plated through-hole means the pin holes are metal-lined so solder connects the pad on both sides of the board. It is useful for connectors and headers that need a strong mechanical and electrical connection.

Qwiic

Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.

RMS

RMS is a way of describing the effective level of an AC signal, such as an audio output voltage. It helps compare audio output levels more meaningfully than a peak voltage number.

solder jumper

A solder jumper is a small pair or group of pads on a circuit board that can be bridged or cut with solder to change a hardware setting. It matters because changing modes may require careful soldering rather than just changing software.

STM32

STM32 is a family of microcontroller chips commonly used in embedded electronics. Knowing a product uses an STM32 can help when looking at firmware updates, pin connections, or low-level serial control options.

Tolerance

Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.

trigger latency

Trigger latency is the delay between an input event, such as pressing a button, and the sound actually starting. Low latency is important for musical instruments and interactive exhibits where delayed sound feels unresponsive.

TX/RX pins

TX and RX are the transmit and receive pins used for serial communication between electronic devices. They matter when wiring the board to another controller because TX usually connects to the other device’s RX, and the voltage level must be compatible.

UART

UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.

USB host

A USB host is the side of a USB connection that controls attached devices, like a computer talking to a keyboard or flash drive. This matters because most microcontroller boards are normally USB devices, so adding USB host support lets them use common USB peripherals.

USB MIDI device

A USB MIDI device connects to a computer or USB host and sends or receives MIDI messages over USB. This matters because it lets the board work with music software or a controller setup where another device is in charge.

USB MIDI host

A USB MIDI host is the device that controls a USB MIDI connection, similar to the role a computer normally plays. Host support matters if you want to plug a USB MIDI controller directly into the board without using a computer.

USB-C

A modern reversible USB connector used for power and data connections. On this product it matters because it can connect directly to a computer as well as to a microcontroller project.

WAV file

A WAV file is an audio file format often used for uncompressed, high-quality sound. For a sound trigger board, WAV support affects what audio files you can load and whether they need converting before use.