The idea of a board that does the next:

• Microcontroller the same as the Teensy 4.1
  • Its super fast
  • It is compatible with Arduino ecosystem
• Audio codec the same as I used
  • SGTL5000
• SD card
• Same components as the previous design but fixing the errors

BOM:

• MIMXRT1062DVL6B: Microcontroller
• SJ-3524-SMT-TR: Audio connector
• USB4105-GF-A: Connector USB DONE
• JST PH. And also buy the kit
• DM3D-SF: SD Slot
• B3U-1000P: Tactile button
• 0S102011MA1QN1: SPDT
• SGTL5000XNLA3R2: Audio codec
• AP7313-18SRG-7: LDO for audio codec
• MCP73831T-2ACI/OT: Miniature charger

Sources:

• NXP Reference design
• Teensy 4.1 schematic
• Teensy 4.0 schematic

Important disclaimer: Teensy uses an internal microcontroller, as a loader. I would need to prove that i am capable to flash it over JTAG from platformIO.