Work in progress...

 

    

 

 

 

Co-project with Alfred Homsma.

8 input channels (relay switched):

  • Channel 1: phono input for MD or MC elements (selectable by jumpers)
  • Channel 2-6: auxiliary inputs
  • Channel 6 can be configured (by jumper) as pre-out for a headphone amplifier
  • Channel 7: connected to internal Bluetooth receiver
  • Channel 8: connected to internal media server (Raspberry Pi)
  • Each input channel can have a preconfigured attenuation (via Raspberry Pi)

3 outputs (relay switched):

  • Channel A or B selectable via InfraRed commands (default channel A is selected)
  • Channel C: always available (e.g. for subwoofer). Can be set to mono by jumpers

Channel selection by push button on front panel or via InfraRed commands

Support for various InfraRed remote controls, e.g. Philips, Sony, NEC.

Volume and attenuation control using XICOR X9514 digital potentiometer with 32 steps

Volume control by rotary encoder or via InfraRed commands

Volume indicator by NeoPixel LED ring (24 LEDs). Volume and channel LED’s are turned off after one minute of inactivity.    

Built-in media server (Raspberry Pi):

  • Logitech Media Server software (or whatever streaming software you want)
  • HifiBerry DAC Pro board; power supply modified to achieve high-end performance
  • Music files stored on 256 Gb internal SD card and optional 256 Gb external USB memory stick
  • Spotify support using Spotty plugin
  • Plugin to allow streaming from Spotify app on smartphone or tablet
  • Internet radio
  • DVD/CD player controlled by Logitech Media Server plugin
  • A LED on the front panel indicates if Raspberry Pi has started

No tone or balance control

Power supply by 5V/3A net adapter


Documentation is in progress and not complete...