Hi Aleister, thank you for the additional information, it is helpful. I create a separate thread for it because I think it is related but not the exact same issue. From your writing I believe the digital domain adds some delay too. A had a look and it seems that your issue shows some resemblance with the issue @eeck has, refer to Async Issue with all digital inputs, ref#85. Unfortunately he sold his SA30 because of it and I cannot test your use case because I do not own any equipment to connect to the digital and analog input. I’ll ask Arcam to have a look at it, maybe they can assist you in solve the issue.