I found a solution to DJing with Sonos. The RCA output of the Dj console goes into bluetooth transmitter 5.0 , can use along with Headphone amplifier unit, and the bluetooth receiver , preferably of the same company, takes the spdif output to playbar. I tried this and there is no lag what so ever.
Links of products used are :
2 peices of https://www.amazon.in/gp/aw/d/B0756H84GP?psc=1&ref=ppx_pop_mob_b_asin_image
One piece of https://www.amazon.in/gp/aw/d/B07MV3PLPC?psc=1&ref=ppx_pop_mob_b_asin_image
Two peices of adapter https://www.amazon.in/SeCro-Female-6-35mm-Stereo-Converter/dp/B06XBKV7FS/ref=mp_s_a_1_2?dchild=1&keywords=1%2F4+inch+to+aux+female&qid=1608451750&sr=8-2