Terra-BerryDAC

RaspberryPi and Terra-BerryDAC AK4490 DAC Terra-BerryDAC AK4490 DAC RaspberryPi and Terra-BerryDAC AK4490 DAC

Small High quality RaspberryPi Audio DAC.

Feature

  • Raspberry Pi HAT compatible, GPIO I2S connection
  • Up sampling by AKM AK4137 SRC,I2S DoP support
  • AKM AK4490 DAC PCM:up to 768KH/32bitz, DSD up to 11.2MHz
  • Low jitter Crystal oscillator for MCLK.
  • Automatic MCLK selection by LRCLK frequency.
  • Balance / Unbalance output
  • Independent DAC power in
  • Combo384 support
  • Odoird support
AK4490 and AK4137

General spec.

  • I2S input:PCM up to768KHz, DSD(I2S DoP) up to11.2MHz
  • SRC output(DAC input):
    PCM :705.6KHz/32bit or 768KHz/32bit
    DSD(DoP):DSD11.2MHz
*DoP marker are 0x05,0xFA,0xAA.

Description of Connectors

Connector description

Analog output pins

  1. Unbalance output: Rch out,GND/Rch out,GND
  2. Balance output : L+(HOT), L-(COLD), GND/R+(HOT), R-(COLD), GND

Switch and Indicator pins

I2S inputSW1SW2SRC output
(DAC mode)
LED1
Auto/Manual
LED2
PCM/DSD
Mode selection
PCMOFF--PCMOFFOFFAuto setting
DSD(DoP)OFF--DSDOFFONAuto setting
PCMONOFFPCMONOFFManual setting
PCMONONDSDONONManual setting
DSD(DoP)ONOFFPCMONOFFManual setting
DSD(DoP)ONONDSDONONManual setting
  • SW OFF is open/SW ON is short to GND
  • SW2 is ignored when SW1 is OFF
  • SRC output format

    I2S input Output mode
    (DAC input mode)
    Auto setting
    (SW1=OFF)
    PCM output
    (SW1=ON/SW2=OFF)
    DSD output
    (SW1=ON/SW2=ON)
    PCM 32KHz PCM 768KHz PCM 768KHz OFF
    PCM 44.1KHz PCM 705.6KHz PCM 705.6KHz DSD 5.6MHz
    PCM 48KHz PCM 768KHz PCM 768KHz DSD 6.1MHz
    PCM 88.2KHz PCM 705.6KHz PCM 705.6KHz DSD 5.6MHz
    PCM 192KHz PCM 768KHz PCM 768Hz DSD 12.2MHz
    PCM 384KHz PCM 768KHz PCM 768KHz DSD 12.2MHz
    DSD 2.8MHz
    (DoP 176.4KHz)
    DSD 11.2MHz PCM 705.6KHz DSD 11.2MHz
    DSD 5.6MHz
    (DoP 352.8KHz)
    DSD 11.2MHz PCM 768KHzz DSD 11.2MHz

    This spec depend on AK4137.

    System

    board connection
    Terra-Berry DAC with Raspberry Pi
    Raspberry Pi I2S DAC
    Terra-Berry DAC with Combo384
    Combo384 USB DAC

    Network players

    • volumio-1.55 (Raspberry pi B+, Raspberry pi 2)
      PCM:up to192KHz
      DSD:2.8MHz
    • lightMPD-v1.0.2(Raspberry pi B+Raspberry pi 2)
      PCM:up to192KHz
      DSD:2.8MHz
    • RuneAudio 0.3(Raspberry pi B+)
      PCM:up to192KHz
      DSD:2.8MHz
    • PicoPlayer 2.05(Raspberry pi B+)
      PCM:up to192KHz
    • Pi MusicBox 0.6.0(Raspberry pi B+)
      PCM:up to192KHz
    • volumio 2 RC2(Raspberry pi 3)
      PCM:up to192KHz
    *Pop noise will occur when DSD start play/stop, skip.

    Options

    • RCA connector daughter board
      RCA CN board