I had posted on Discord and seems lack of communication. This Pimoroi forum seems much better for a faster respond. Here what I have written on Discord.
Few days ago, I entered Adafruit on Discord to ask some questions about Adafruit VS1053B board that might be a solution for my Neotrellis M4 as stand-alone synthesizer or so. It turned out that Adafruit VS1053 is SPI not i2C. Because of neotrellis M4 has a STEMMA port which is SDA, SCL, GND, and VCC. Then, my mind popped up… wait a minute Pimoroni Garden Breakout might be solution to use SD card breakout since it has both SPI and I2C… However, it focuses on Python language which I am more into C /C++ language using Arduino IDE ( well, more likely plug and play person). Anyway, is it possible to use Garden Breakout? Let me know. Do not worry if the answer is not possible won’t discourage me. Just do not want to have a false hope.
I drool on Synthstrom Deluge but the price is spiky. No velocity sensor. Neotrellis M4 is nice size, 32 buttons, accelerometer, and neopixel colorful are sufficient. What the most cool is about this- open source.
If Garden breakout with SPI and i2c is not possible, I have a 3.7 Class D amplifier module by Adafruit that has been left dust for long time- I am going to try hook up and use DIY lipo battery. Shall see what happen. The reason I really like sd card is more storage than rely on internal RAM.
Well, happy Friday and happy hackings