I decided I want to create my own board for Digital Signal processing. Here are going to be some references of what do I want in my design.

Features:

• ESP32S3 16 Mb RAM
• SGTL5000
• SD
• Microphone pre amplifier
• Line In
• Line Out
• HP out (SGTL)
• MIDI input/output, with Midi connector
• Connector for I2C Expander for lots of Analog/Digital inputs/outputs
  • VCC
  • INT
  • SDA
  • SCL
  • GND
• Battery, with charger
  • BQ25101, its a bit too small
  • MCP73831T-2ACI/OT
  • Connector for battery, compatible with the RS battery

Reference designs:

• Teensy Audio Board

Some references