I have a script which bounce and replace the selected regions without processing (preserving the original audio, without being affected by filters).
-
Case 1: It works fine in normal regions.
-
Case 2: If I add gain by increasing the envelope:
- Case 2-A: If the result peak level doesn’t exceed 0 db, works fine.
- Case 2-B: If the result peak level does exceed 0 db, Ardour crashes.
Is there a way I can limit the maximum peak level, without using processing?
Or tell bounce_range function to ignore the envelope, maybe?
I am using Ardour 7.3 on Ubuntu, btw.
Here is the script:
ardour { ["type"] = "EditorAction", name = "mb:Bounce without Processing + Replace Regions",
license = "MIT",
author = "mb, Ardour Team",
description = [[Bounce selected regions w/o processing and replace region]]
}
function factory (params) return function ()
-- there is currently no direct way to find the track
-- corresponding to a [selected] region
function find_track_for_region (region_id)
for route in Session:get_tracks():iter() do
local track = route:to_track();
local pl = track:playlist ()
if not pl:region_by_id (region_id):isnil () then
return track
end
end
assert (0); -- can't happen, region must be in a playlist
end
-- get selection
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:Selection
local sel = Editor:get_selection ()
-- prepare undo operation
Session:begin_reversible_command ("Bounce+Replace Regions")
local add_undo = false -- keep track if something has changed
local proc = ARDOUR.LuaAPI.nil_proc () -- bounce w/o processing -- mb
local mb_prefix = "mb_bounce_" .. os.time() -- mb
-- Iterate over Regions part of the selection
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:RegionSelection
for r in sel.regions:regionlist ():iter () do
-- each of the items 'r' is a
-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Region
local track = find_track_for_region (r:to_stateful():id())
local playlist = track:playlist ()
-- clear existing changes, prepare "diff" of state for undo
playlist:to_stateful ():clear_changes ()
-- print(r:position(), r:length())
-- bounce the region with processing
-- local region = track:bounce_range (r:position (), r:position() + r:length (), ARDOUR.InterThreadInfo (), track:main_outs (), false);
-- local region = track:bounce_range (r:position (), r:position () + r:length (), ARDOUR.InterThreadInfo (), proc, false, "mb_bounce_");
local gstart = r:position():samples() --r:position ()
local gstop = gstart + r:length():samples() -- r:position () + r:length ()
local region = track:bounce_range (gstart, gstop, ARDOUR.InterThreadInfo (), proc, false, mb_prefix);
-- local region = track:bounce_range (gstart, gstop, ARDOUR.InterThreadInfo (), track:main_outs(), false, mb_prefix); --processing, using track filters
-- local region = track:bounce_range (gstart, gstop, ARDOUR.InterThreadInfo (), proc, true, mb_prefix); --with processing
-- remove old region..
playlist:remove_region (r);
-- ..and add the newly bounced one
-- playlist:add_region (region, r:position (), 1, false, 0, 0)
playlist:add_region (region, r:position (), 1, false, 0, 0, false)
-- create a diff of the performed work, add it to the session's undo stack
-- and check if it is not empty
if not Session:add_stateful_diff_command (playlist:to_statefuldestructible ()):empty () then
add_undo = true
end
end
-- all done, commit the combined Undo Operation
if add_undo then
-- the 'nil' Command here mean to use the collected diffs added above
Session:commit_reversible_command (nil)
else
Session:abort_reversible_command ()
end
end end
function icon (params) return function (ctx, width, height, fg)
local wh = math.min (width, height) * .5
local ar = wh * .2
ctx:set_line_width (1)
function stroke_outline (c)
ctx:set_source_rgba (0, 0, 0, 1)
ctx:stroke_preserve ()
ctx:set_source_rgba (c, c, c, 1)
ctx:fill ()
end
ctx:rectangle (wh - wh * .6, wh - .7 * wh, wh * 1.2, .5 * wh)
stroke_outline (.7)
ctx:rectangle (wh - wh * .6, wh + .1 * wh, wh * 1.2, .5 * wh)
stroke_outline (.9)
-- arrow
ctx:set_source_rgba (0, 1, 0, 1)
ctx:set_line_width (ar * .7)
ctx:move_to (wh, wh - .5 * wh)
ctx:rel_line_to (0, wh)
ctx:stroke ()
ctx:move_to (wh, wh + .5 * wh)
ctx:rel_line_to (-ar, -ar)
ctx:rel_line_to (2 * ar, 0)
ctx:close_path ()
ctx:stroke ()
end end
