Midi Merge Technique?

[|||| Philip ||||]

I'm exploring a possible CPU based MIDI knob box project and I would like to
"pass thru and merge" midi data. The box would have a MIDI IN and MIDI OUT.
The incoming midi data from a sequencer or keyboard will pass through and
Midi knob Data from my CPU box will be merged. What is a good technique for
doing this?

Here are two thought I have come up with so far:

1. MIDI IN data is monitored by CPU and CPU waits for a pause before sending
knob data. (when sending, it kills any incoming data from the MIDI in Port)
This method is easy to do but things like midi clk at the midi in  will be a
problem when trying to find a pause or when cutting)

2. MIDI IN Data is monitored by CPU and buffered in memory (FIFO like) The
CPU generated data is then interleaved and transmitted with the fifo buffer.

Thanks again
Philip