-- play.lua : realtime transport playback to keep the DSP host's audio callback
-- alive, so an external script can snapshot memory while ctx fields are live.
local keep_secs = 300

reaper.Main_OnCommand(1007, 0)  -- Transport: Play (realtime audio)
local t0 = reaper.time_precise()
while reaper.time_precise() - t0 < keep_secs do
    reaper.Sleep(200)
end
reaper.OnStopButton()