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A universal shifting circuit for interfacing decoder X with converter Y.

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This circuit allows you to directly combine any decoder/receiver with any converter without re-sampling, oversampling or filtering ICs in between. You only have to figure out how much shifting is required for left and right channel DATA.

Below you'll find some examples for Philips I2S signals and for the format that's available from Sony decoders

universal_shifter

Explanations to the circuit

Sig$3:    serial DATA comming from decoder/reciever

Sig$4:    BCK comming from decoder/reciever

Sig$14:  LRCK comming from decoder/reciever

Sig$7:    shifted right channel DATA going to converters

Sig$9:    shifted right channel inverted DATA going to converters

Sig$10:   shifted left channel DATA going to converters

Sig$11:   shifted left channel inverted DATA going to converters

Sig$12:   BCK going to converters

Sig$15:   LRCK going to converters

Sig$5:     shifted right channel DATA coming from shifter

Sig$6:     shifted left channel DATA coming from shifter

Sony decoder

Delay Sig$5 delay Sig$6
16bit DAC 24 IC3 / Q7 48 IC6 / Q7
18bit DAC 22 IC3 / Q5 46 IC6 / Q5
20bit DAC 20 IC3 / Q3 44 IC6 / Q3
24bit DAC 16 IC2 / Q7 40 IC5 / Q7

Philips decoder

Delay Sig$5 delay Sig$6
16bit DAC 15 IC2 / Q6 47 IC6 / Q6
18bit DAC 13 IC2 / Q4 45 IC6 / Q4
20bit DAC 11 IC2 / Q2 43 IC6 / Q2
24bit DAC 7 IC1 / Q6 39 IC5 / Q6
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