I'm not a Logic or recording expert. I'm a composer currently doing chamber style stuff that's trying to get my score played. After researching I decided to go for Elite Strings. I use a M1 Mac 8gb RAM and memory pressure shows Green - I just have 4 instruments. I have had no problems with the violin, Viola and Cello via the Synchron. But the Contrabass continually emits a low frequency sound. It isn't there when it's not playing initially. But as soom as there is sound on the track this low frequency sound starts and never stops and persists even if the track has no information and often even after playback is finished. The Synchron plugin player in Logic also shows that there is a sound as well for the contrabass. Again, this doesn't happen for violin, Viola or Cello. Only for contrabass. If I use Apple's studio strings for Contrabass this doesn't occur, only for Synchron.
My overall process is that I import midi into Logic via my score tool. I then move the imported tracks over to the VSL ones and set up the articulations. My articulation sets are very simple ( just 2 for each instrument - different dynamics depending on a fast or slow section ) since I just wanted prove I could get stuff working with good sound before I created a complex set of articulations. This problem happended right away with the Bass. Appreciate any input.