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ADSP21469 SPDIF Rx and Tx latency

Thread Summary

The user is measuring a 3.5 sample delay at 48 kHz between two DSPs connected via SPDIF transmitter and receiver. The user has confirmed this latency through impulse response measurements with the SPDIF receiver and transmitter directly connected, and is seeking official documentation or confirmation of this delay. The user aims to minimize latency to synchronize the two DSPs.
AI Generated Content

Hi all,

I can't find any information on the signal delay that the SPDIF receiver and transmitter introduce.

I assume that the transmitter does not generate signal latency at all, however the receiver should.

So, let's assume the following:

DSP 1 generates a master clock, outputs a signal via ADCs and passes this signal via SPDIF transmitter to DSP2

DSP2 uses the recovered clocks and outputs the received signal via ADC.

Currently, I measure a delay of 3.5 samples at 48 kHz between these 2 analog signals.

But there should be any official information about this, shouldn't it?

Best regards,

Rainer