The NeoTrellis M4 is an all-in-one USB + NeoPixel + Elastomer + Audio board. It’s powered by our new favoritest-chip-in-the-world, the SAMD51, a Cortex M4 core running at 120 MHz. This chip has a speedy core with CircuitPython and Arduino support, hardware DSP/floating point, dual DACs (more on that later!) and all the goodies you expect from normal chips like I2C, ADC, DMA, etc. It has a roomy 512KB of flash and 192KB of SRAM so it’s great for CircuitPython, we added a full 8MB flash chip so tons of space for files and audio clips.
The native USB port can turn it into a MIDI USB device if you like, in both Arduino and CircuitPython. Tether it to a computer or tablet, if you like. Or use it in standalone mode, as long as its powered from a USB power plug, it’ll run whatever firmware is burned into it.

Key Features

ATSAMD51 32-bit Cortex M4 core running at 120 MHz (32-bit, 3.3V logic and power)
Hardware DSP and floating point support
512 KB flash, 192 KB RAM
USB/USB MIDI device
8MB SPI FLASH
4×8 elastomer pads
4×8 NeoPixels for each pad
TRRS Headphone jack with stereo DAC outputs on Left/Right
Built in MAX4466 electret mic amplifier
4-JST hacking port with 3.3V power, ground, and two GPIO that can be I2C/ADC/UART
ADXL343 triple-axis accelerometer
Dimensions: 120.0 x 62.0 x 8.3mm
Weight: 29.3g

Relevant Resources:

User Guide
AdaBox 010
Trellis M4 Expressive MIDI Controller
Star Trek Soundboard with NeoTrellis
Trellis M4 Beat Sequencers
NeoTrellis M4 Animated Dice Roller
NeoTrellis Tabletop RPG Soundboard
What is Web MIDI & BLE MIDI?
Christmas Soundboard with NeoTrellis M4
FlappyBird Game for NeoTrellis M4 in CircuitPython
Launch Deck Trellis M4
NeoTrellis M4 MIDI File Synthesizer
Trellis M4 Audio Filter Visualizer
NeoTrellis M4 Memory Game
Neotrellis M4 Live Launcher

FAQs:
Q: What are the key features of Adafruit NeoTrellis M4?
A: The NeoTrellis M4 features 4×8 pressure-sensitive pads, 32 NeoPixels, stereo audio out with Class D amp, electret mic amp, LIS3DH accelerometer, and more. It is perfect for creating interactive projects with lights, sounds, and touch input.
Q: What is the processor used in Adafruit NeoTrellis M4?
A: It is powered by a powerful ATSAMD51J19 microcontroller, offering ample processing power for complex projects and smooth performance.
Q: What are the connectivity options available?
A: The board offers USB-C connectivity for power and programming, STEMMA QT connector for easy I2C device connection, and castellated pads for soldering headers or wires.
Q: Is it compatible with Arduino and CircuitPython?
A: Yes, the NeoTrellis M4 is compatible with both Arduino and CircuitPython, providing flexibility for users to choose their preferred development environment.
Q: What applications can I create with Adafruit NeoTrellis M4?
A: You can create various interactive projects such as MIDI controllers, musical instruments, sound-reactive installations, games, and much more using this versatile board.