[LAD] accepted use of sync callback

Hi everybody, I have a question. I'm trying to figure out how to deal with transport locate changes in my arpeggiator "flarps". I am generating MIDI events only when necessary, so I'm not able to rewind the state of the program. I only keep track of Note-off messages, because they can be sent out in the future, to allow overlapping notes. All the MIDI notes are calculated relative to each other. So I keep track of time internally. So I only need to know the first frame of the period, when somebody does a jack_transport_locate, and I need to know when this happens so I can initialize the program state. My question is, if it would be acceptable to use the sync callback to do this, because strictly speaking, my client wouldn't be a slow sync client. Is there a more preferable way to do this, or should I do major redesign, and use the time jack provides with each period directly. I would be very glad with any of your insights or suggestions. greetings, lievenmoors