The reason for this is that the LTC generator uses the slave's
resolution as watermark for max-drift, resync. A possible drawback:
session-process will force silent rolls if the delta is larger
than the resolution. LTC has a carrier freq of ~2kHz, choosing
half of that seems a good compromise.
git-svn-id: svn://localhost/ardour2/branches/3.0@13380 d708f5d6-7413-0410-9779-e7cbd77b26cf
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