The board/chip I am using will both receive from and output to the audio adapter. The board has separate grounds for audio and digital separated by ferrite beads. Should I run a separate isolated ground line from the adapter from the audio adapter line in and outs to the analog ground on the second board or have as much of the ground plane as possible be audio ground and isolate digital ground as much as possible? Should the two be tied together at one pin on the teensy? Thanks for any thoughts you may have.