Quad PCM1794 DAC mainboard with switchable I2S input source.
This mainboard contains 2 BB PCM1794 DAC chips in NOS mode.
It can be extended with 3 more extra DAC boards to improve the sound quality.
This design contains I out from the DAC

Original design by Doede Douma (DDDAC NOS DAC)
www.dddac.com

improvements:

    Combined MCK and BCK to improve BCK (Reclock this eliminates Jitter).
    Switchable Dual I2S input.
    Isolation between FiFo reclock and DAC boards.
    Low and Ultra low noise onboard powersupplies