CD Player as a DAC

I designed a small SAA7220 adapter board,  it adds a coax digital input on a SAA7220 Chipset CD-player, so it can used as a DAC when the cd player is not playing . When the CD player is started the spdif input is switch off and the cd player is working as normal.The spdif interface is based on a WM8804. and can be used at  32 , 44.1 and 48 kHz.

Idea started on

A small Demo using Raspberry PI with Moodeaudio  – demo_cd_dac

Proof of Concept.

Design a prototype  circuitboard…





Some Measurements Digital input








Digital input in CD 650

Digital input in CD 472


En CD 471

In a CD 670

Just enough room

In a CD 880 photo by Paolo

photo by Paolo

Here in a Cambridge CD 3

Nieuwe Versie ietsje smaller


CD as a DAC in Marantz CD85 , with NOS switch



Here in a CD94  , with little modification