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HILO edited this page Dec 3, 2023 · 16 revisions

Image of FreeDSP OCTAVIA

Overview

The Octal output features inspired FreeDSP OCTAVIA to its name. This uses Analog Devices ADAU1452 or ADAU1466 DSP for Standalone Audio processing. An USBi-compatible programmer or TCPi via Raspberry-Pi's I2C port path is provided for DSP/EEPROM programming. The Raspberry-Pi is just an option, so if you do not need it, you can leave it and program the DSP/EEPROM via the USBi Connector.

Output Sections:

The output can configure the following types...

  • 8ch Balanced output for XLR-Connector
  • 8ch RCA-pin Differential Output
  • 8ch Unbalanced RCA-pin output

Input section

Various source capabilities are as follows...

  • RCA-pin Analog Input (Unbalanced)
  • Optical(TOSLINK) S/PDIF Digital Audio Input
  • Coaxial S/PDIF Digital Audio Input
  • Amanero Combo384 or compatible USB-I2S Input Slot
  • Raspberry-Pi 40pin I2S Audio and I2C Interface
  • Extra I2S Input header for the future extension

Other Features:

DSP Related Features

  • ADAU1452/1466 DSP for 2 in 8 out Audio Processing
  • 2 LED indicators controlled by MP6 and MP7
  • I2C(0x70) connected USBi Interface with Bus-switch
  • 4 + 1(Master) Rotary Pots for AUX-ADC
  • 4 steps + 1 mute level control Rotary switched Voltage Source for Input source selection
  • LED source position indicator output header
  • DSP Reset button
  • YORK-ready design (from version 1.1)

Power Supply-Related Features

  • Common mode filtered Reverse voltage protection for Burrel DC Input
  • Restart/Shutdown button for Raspberry-Pi
  • Independent Power switch for Raspberry-Pi
  • Mains Power switch linked with Raspberry-Pi
  • R/G/B Power Status indicator LED

USB Input-Related Features

  • DSD protection mute control for Amanero Combo384

Raspberry-pi Related Features

  • On-board power supply for Raspberry-Pi.
  • Automatic enabled power-off delay feature for Raspberry-pi shutdown.
  • IR Remote sensor for Raspberry-Pi
  • I2C pin header for external character display control.
  • FTDI USB-Serial Console Cable header.

Continue to ...
-> Schematic Design Page
-> Custom Enclosure Building
-> Example SigmaStudio Projects
-> Configuring the DSP and EEPROM
-> Board Workarounds
-> Change Order List

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