Finally I got official reply from Singxer. Holo dac 7,9,10 switches ON. See attached pictures for other dacs.

I've tested extensively with both PCM and DSD on Holo Spring 2 (also with 2.20 firmware on SU-1 and latest driver 4.67). Can confirm that the correct dip switches for i2s is 7&9 on all others off. Sound great with 120 hrs burning. To my surprise, it is sound better than my Emm Labs XDS1 v1 +...

The SU-1 dealer wrote to me....."The manufacturer said that you did not pair the I2S. Please refer to the manual for pairing settings. Generally speaking, the machine is ok.". I'm not sure what he is talking about (besides installing latest driver, correct firmware and dip switches setting for...

Thanks. I tried that this morning. Switch 9 swap s PCM channels and probably switch 7 flips DSD channels. So my setting is all switches set to "off" except 7 and 9. My new SU1 comes with 10 switches. Thanks for your suggestion. Appreciated.

Need help. I've Holo Audio Spring 2 feeded by SU-1 via I2S. Sound so sweet but left - right channels are reversed! I've tried 2.00 firmware as well as 2.20 firmware with the latest driver. AES plays left-right channel correctly only i2s that got it reverse. All dip switches are set to off...