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FreeDSP OCTAVIA was named comes from the Octal output features. 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 programing. 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.
The output can configure the following types...
- 8ch Balanced output for XLR-Connector
- 8ch RCA-pin Differential Output
- 8ch Unbalanced RCA-pin output
- Duo-Differential Quad DAC Stereo mode
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 Inout header for the future extension
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
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
- IR Remote sensor for Raspberry-Pi
- On-board power supply for Raspberry-Pi with shutdown control