More modernizations

Create LICENSE

.python-version

@@ -0,0 +1 @@
+3.11

LICENSE

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2020, Jamie Hardt
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -1,7 +1,16 @@
 # soundobjects Blender Add-On
 
-This add-on adds three operators for working with immersive 3D audio in [Blender][blender], specifically it allows you to create ADM Broadcast
-WAVE files for use with [Dolby Atmos][atmos] or other object-based sound mixing workflows.
+**NOTE**: _Avid made some changes to ADM file import in Pro Tools and it no
+longer accepts ADMs made by this plugin. It may still work with other DAWs._
+
+This add-on adds three operators for working with immersive 3D audio in
+[Blender][blender], specifically it allows you to create ADM Broadcast WAVE
+files for use with [Dolby Atmos][atmos] or other object-based sound mixing
+workflows.
+
+[Here](https://vimeo.com/464569386) you can see a short demo of how to add
+sounds to an animated Blender scene and import the resulting file into Pro
+Tools and then play them into a Dolby DAPS Renderer.
 
 [blender]: https://www.blender.org
 [atmos]: https://www.dolby.com/technologies/dolby-atmos/
@@ -10,25 +19,32 @@ WAVE files for use with [Dolby Atmos][atmos] or other object-based sound mixing
 
 ### `import_test.wav_file_batch`
 
-**Import WAV Files:** This operator allows you to add multiple audio files to a .blend file so they'll be available to
-the *Add Sounds to Meshes* operator.
+**Import WAV Files:** This operator allows you to add multiple audio files to a
+.blend file so they'll be available to the *Add Sounds to Meshes* operator.
 
 ### `object.add_speakers_to_obj`
 
-**Add Sounds to Meshes:** This operator takes all the selected objects in the current scene and attaches a new speaker 
-locked to that object's location throughout the animation. You provide the prefix for the name of a set of sound files
-added with the _Import WAV Files_ operator, and these are added to each selected object randomly. The sounds can be 
-timed to either begin playing at the beginning of the sequence, at a random time, or when the respective object is
+**Add Sounds to Meshes:** This operator takes all the selected objects in the
+current scene and attaches a new speaker locked to that object's location
+throughout the animation. You provide the prefix for the name of a set of sound
+files
+added with the _Import WAV Files_ operator, and these are added to each
+selected object randomly. The sounds can be timed to either begin playing at
+the beginning of the sequence, at a random time, or when the respective object
+is
 closest to the scene's camera.
 
 ### `export.adm_wave_file`
 
-**Export ADM Wave File:** This operator exports all of the speakers in a scene as an ADM Broadcast-WAV file compartible
-with a Dolby Atmos rendering workflow. This produces a multichannel WAV file with embedded ADM metadata the passes
-panning information to the client. (Has been tested and works with Avid Pro Tools 2020).
+**Export ADM Wave File:** This operator exports all of the speakers in a scene
+as an ADM Broadcast-WAV file compartible with a Dolby Atmos rendering workflow.
+This produces a multichannel WAV file with embedded ADM metadata the passes
+panning information to the client. (Has been tested and works with Avid Pro
+Tools 2020).
 
 
-## Important Note
+## Requirements
 
-This add-on requires that the [EBU Audio Renderer](https://github.com/ebu/ebu_adm_renderer) (`ear` v2.0) Python package 
+This add-on requires that the [EBU Audio
+Renderer](https://github.com/ebu/ebu_adm_renderer) (`ear` v2.0) Python package
 be installed to Blender's Python.

__init__.py

@@ -10,13 +10,25 @@ bl_info = {
     "author": "Jamie Hardt",
     "version": (0, 1),
     "warning": "Requires `ear` EBU ADM Renderer package to be installed",
-    "blender": (2, 90, 0),
+    "blender": (2, 93, 1),
     "category": "Import-Export",
     "support": "TESTING",
     "tracker_url": "https://github.com/iluvcapra/soundobjects_blender_addon/issues",
     "wiki_url": ""
 }
 
+# class SoundObjectAttachmentPanel(bpy.types.Panel):
+#    bl_idname = "OBJECT_PT_sound_object_attachment_panel"
+#    bl_space_type = "VIEW_3D"
+#    bl_label = "Attach Sounds"
+#    bl_region_type = "UI"
+#    bl_category = "Tools"
+#    bl_context = "object"
+#    bl_options = {"DEFAULT_CLOSED"}
+
+#    def draw(self, context):
+#        self.layout.label(text="Attach Sounds")
+
 
 def import_wav_menu_callback(self, context):
     self.layout.operator(ImportWav.bl_idname, text="WAV Audio Files (.wav)")
@@ -39,7 +51,7 @@ def register():
     bpy.types.TOPBAR_MT_file_export.append(export_adm_menu_callback)
     bpy.types.VIEW3D_MT_object.append(add_sound_to_mesh_menu_callback)
 
-    bpy.utils.register_class(SoundObjectAttachmentPanel)
+#    bpy.utils.register_class(SoundObjectAttachmentPanel)
     
 
 def unregister():
@@ -51,4 +63,4 @@ def unregister():
     bpy.types.TOPBAR_MT_file_export.remove(export_adm_menu_callback)
     bpy.types.VIEW3D_MT_object.remove(add_sound_to_mesh_menu_callback)
 
-    bpy.utils.unregister_class(SoundObjectAttachmentPanel)
+#    bpy.utils.unregister_class(SoundObjectAttachmentPanel)

intern/add_sound_to_meshes.py

@@ -1,8 +1,10 @@
 import bpy
 from numpy.linalg import norm
+from numpy.typing import ArrayLike
 from random import uniform, gauss
 from math import floor
 from enum import Enum
+from typing import cast
 
 from dataclasses import dataclass
 
@@ -27,7 +29,8 @@ class SpatialEnvelope:
     exits_range: int
 
 
-def sound_camera_spatial_envelope(scene: bpy.types.Scene, speaker_obj, considered_range: float) -> SpatialEnvelope:
+def sound_camera_spatial_envelope(scene: bpy.types.Scene, speaker_obj,
+                                  considered_range: float) -> SpatialEnvelope:
     min_dist = sys.float_info.max
     min_dist_frame = scene.frame_start
     enters_range_frame = None
@@ -35,8 +38,10 @@ def sound_camera_spatial_envelope(scene: bpy.types.Scene, speaker_obj, considere
 
     in_range = False
     for frame in range(scene.frame_start, scene.frame_end + 1):
+        assert scene.camera
         scene.frame_set(frame)
-        rel = speaker_obj.matrix_world.to_translation() - scene.camera.matrix_world.to_translation()
+        rel = speaker_obj.matrix_world.to_translation() \
+            - scene.camera.matrix_world.to_translation()
         dist = norm(rel)
 
         if dist < considered_range and not in_range:
@@ -44,7 +49,7 @@ def sound_camera_spatial_envelope(scene: bpy.types.Scene, speaker_obj, considere
             in_range = True
 
         if dist < min_dist:
-            min_dist = dist
+            min_dist = float(dist)
             min_dist_frame = frame
 
         if dist > considered_range and in_range:
@@ -52,6 +57,9 @@ def sound_camera_spatial_envelope(scene: bpy.types.Scene, speaker_obj, considere
             in_range = False
             break
 
+    assert enters_range_frame
+    assert exits_range_frame
+
     return SpatialEnvelope(considered_range=considered_range,
                            enters_range=enters_range_frame,
                            exits_range=exits_range_frame,
@@ -59,13 +67,20 @@ def sound_camera_spatial_envelope(scene: bpy.types.Scene, speaker_obj, considere
                            min_distance=min_dist)
 
 
-def closest_approach_to_camera(scene, speaker_object):
+def closest_approach_to_camera(scene: bpy.types.Scene, 
+                               speaker_object: bpy.types.Object) -> tuple[float, int]:
+    """
+    Steps through the scene frame-by-frame and returns a tuple of 
+    (minumum_distance, at_frame_index)
+    """
     max_dist = sys.float_info.max
     at_time = scene.frame_start
     for frame in range(scene.frame_start, scene.frame_end + 1):
+        assert scene.camera
         scene.frame_set(frame)
-        rel = speaker_object.matrix_world.to_translation() - scene.camera.matrix_world.to_translation()
-        dist = norm(rel)
+        rel = speaker_object.matrix_world.to_translation() - \
+                scene.camera.matrix_world.to_translation()
+        dist = float(norm(cast(ArrayLike, rel)))
 
         if dist < max_dist:
             max_dist = dist
@@ -74,7 +89,7 @@ def closest_approach_to_camera(scene, speaker_object):
     return (max_dist, at_time)
 
 
-def track_speaker_to_camera(speaker, camera):
+def track_speaker_to_camera(speaker):
     camera_lock = speaker.constraints.new('TRACK_TO')
     camera_lock.target = bpy.context.scene.camera
     camera_lock.use_target_z = True
@@ -89,7 +104,8 @@ def spot_audio(context, speaker, trigger_mode, sync_peak, sound_peak, sound_leng
         audio_scene_in = envelope.closest_range
 
     elif trigger_mode == TriggerMode.RANDOM:
-        audio_scene_in = floor(uniform(context.scene.frame_start, context.scene.frame_end))
+        audio_scene_in = floor(
+            uniform(context.scene.frame_start, context.scene.frame_end))
     elif trigger_mode == TriggerMode.RANDOM_GAUSSIAN:
         mean = (context.scene.frame_end - context.scene.frame_start) / 2
         audio_scene_in = floor(gauss(mean, gaussian_stddev))
@@ -127,11 +143,6 @@ def constrain_speaker_to_mesh(speaker_obj, mesh):
     location_loc.target = mesh
     location_loc.target = mesh
 
-
-def apply_gain_envelope(speaker_obj, envelope):
-    pass
-
-
 def add_speakers_to_meshes(meshes, context, sound=None,
                            sound_name_prefix=None,
                            sync_peak=False,
@@ -146,7 +157,8 @@ def add_speakers_to_meshes(meshes, context, sound=None,
             print("object is not mesh")
             continue
 
-        envelope = sound_camera_spatial_envelope(context.scene, mesh, considered_range=5.)
+        envelope = sound_camera_spatial_envelope(
+            context.scene, mesh, considered_range=5.)
 
         speaker_obj = next((spk for spk in context.scene.objects
                             if spk.type == 'SPEAKER' and spk.constraints['Copy Location'].target == mesh), None)
@@ -156,7 +168,7 @@ def add_speakers_to_meshes(meshes, context, sound=None,
             speaker_obj = context.selected_objects[0]
 
         constrain_speaker_to_mesh(speaker_obj, mesh)
-        track_speaker_to_camera(speaker_obj, context.scene.camera)
+        track_speaker_to_camera(speaker_obj)
 
         if sound_name_prefix is not None:
             sound = sound_bank.random_sound()
@@ -170,6 +182,4 @@ def add_speakers_to_meshes(meshes, context, sound=None,
                        gaussian_stddev=gaussian_stddev,
                        sound_bank=sound_bank, envelope=envelope)
 
-            apply_gain_envelope(speaker_obj, envelope)
-
         speaker_obj.data.update_tag()

intern/generate_adm.py

@@ -1,7 +1,5 @@
 import bpy
 
-from contextlib import contextmanager
-
 import lxml
 import uuid
 from fractions import Fraction
@@ -27,12 +25,24 @@ from .geom_utils import (speaker_active_time_range,
                          speakers_by_min_distance,
                          speakers_by_start_time)
 
-from .object_mix import (ObjectMix, ObjectMixPool, object_mixes_from_source_groups)
+from .object_mix import (ObjectMix, ObjectMixPool,
+                         object_mixes_from_source_groups)
 
 from .speaker_utils import (all_speakers)
 
 
 def group_speakers(speakers, scene) -> List[List[bpy.types.Object]]:
+    """
+    Accepts a list of speakers and a scene, and returns a list of lists.
+
+    Each list contains a list of speakers which are guaranteed to not have
+    overlapping sounds. Each of the child lists contains a list of speaker
+    objects in ascending order by start time.
+
+    Speakers are allocated to lists on the basis of their minimum distance to
+    the camera according to `speakers_by_min_distance`. Closer sounds will 
+    appear on the earliest list if there is no overlap.
+    """
     def list_can_accept_speaker(speaker_list, speaker_to_test):
         test_range = speaker_active_time_range(speaker_to_test)
 
@@ -62,7 +72,8 @@ def group_speakers(speakers, scene) -> List[List[bpy.types.Object]]:
     return ret_val
 
 
-def adm_for_object(scene, sound_object: ObjectMix, room_size, adm_builder, object_index):
+def adm_for_object(scene: bpy.types.Scene, sound_object: ObjectMix, room_size,
+                   adm_builder, object_index):
     fps = scene.render.fps
     frame_start = scene.frame_start
     frame_end = scene.frame_end
@@ -79,7 +90,8 @@ def adm_for_object(scene, sound_object: ObjectMix, room_size, adm_builder, objec
     created.track_uid.bitDepth = sound_object.bits_per_sample
 
 
-def adm_for_scene(scene, sound_objects: List[ObjectMix], room_size):
+def adm_for_scene(scene: bpy.types.Scene, sound_object_mixes: List[ObjectMix],
+                  room_size):
     adm_builder = ADMBuilder()
 
     frame_start = scene.frame_start
@@ -92,8 +104,9 @@ def adm_for_scene(scene, sound_objects: List[ObjectMix], room_size):
 
     adm_builder.create_content(audioContentName="Objects")
 
-    for object_index, sound_object in enumerate(sound_objects):
-        adm_for_object(scene, sound_object, room_size, adm_builder, object_index)
+    for object_index, sound_object in enumerate(sound_object_mixes):
+        adm_for_object(scene, sound_object, room_size,
+                       adm_builder, object_index)
 
     adm = adm_builder.adm
 
@@ -105,23 +118,28 @@ def adm_for_scene(scene, sound_objects: List[ObjectMix], room_size):
 
 
 def bext_data(scene, sample_rate, room_size):
-    description = "SCENE={};ROOM_SIZE={}\n".format(scene.name, room_size).encode("ascii")
-    originator_name = "Blender {}".format(bpy.app.version_string).encode("ascii")
+    description = "SCENE={};ROOM_SIZE={}\n".format(
+        scene.name, room_size).encode("ascii")
+    originator_name = "Blender {}".format(
+        bpy.app.version_string).encode("ascii")
     originator_ref = uuid.uuid1().hex.encode("ascii")
     date10 = strftime("%Y-%m-%d").encode("ascii")
     time8 = strftime("%H:%M:%S").encode("ascii")
-    timeref = int(float(scene.frame_start) * sample_rate / float(scene.render.fps))
+    timeref = int(float(scene.frame_start) *
+                  sample_rate / float(scene.render.fps))
     version = 0
     umid = b"\0" * 64
     pad = b"\0" * 190
 
-    data = struct.pack("<256s32s32s10s8sQH64s190s", description, originator_name,
-                       originator_ref, date10, time8, timeref, version, umid, pad)
+    data = struct.pack("<256s32s32s10s8sQH64s190s", description,
+                       originator_name, originator_ref, date10, time8, timeref,
+                       version, umid, pad)
 
     return data
 
 
-def attach_outfile_metadata(out_format, outfile, room_size, scene, sound_objects):
+def attach_outfile_metadata(out_format, outfile, room_size, scene,
+                            sound_objects):
     adm, chna = adm_for_scene(scene, sound_objects, room_size=room_size)
     outfile.axml = lxml.etree.tostring(adm, pretty_print=True)
     outfile.chna = chna
@@ -150,13 +168,16 @@ def write_outfile_audio_data(outfile, shortest_file, sound_objects):
         cursor = cursor + to_read
 
 
-def write_muxed_wav(mix_pool: ObjectMixPool, scene, out_format, room_size, outfile, shortest_file):
+def write_muxed_wav(mix_pool: ObjectMixPool, scene, out_format, room_size,
+                    outfile, shortest_file):
     sound_objects = mix_pool.object_mixes
-    attach_outfile_metadata(out_format, outfile, room_size, scene, sound_objects)
+    attach_outfile_metadata(out_format, outfile,
+                            room_size, scene, sound_objects)
     write_outfile_audio_data(outfile, shortest_file, sound_objects)
 
 
-def mux_adm_from_object_mix_pool(scene, mix_pool: ObjectMixPool, output_filename, room_size=1.):
+def mux_adm_from_object_mix_pool(scene, mix_pool: ObjectMixPool,
+                                 output_filename, room_size=1.):
     object_count = len(mix_pool.object_mixes)
     assert object_count > 0
 
@@ -178,11 +199,19 @@ def print_partition_results(object_groups, sound_sources, too_far_speakers):
             print(" - %s" % source.name)
 
 
-def partition_sounds_to_objects(scene, max_objects):
+def partition_sounds_to_objects(scene, max_objects) -> \
+        tuple[list[list[bpy.types.Object]], list[list[bpy.types.Object]]]:
+    """
+    Allocates sounds in the scene into non-overlapping lists of sounds. The
+    second return value is the list of sounds that could not be allocated
+    because the max_objects limit was exceeded.
+
+    Sounds are allocated to lists according to `group_speakers`.
+    """
     sound_sources = all_speakers(scene)
 
     if len(sound_sources) == 0:
-        return []
+        return [], []
 
     object_groups = group_speakers(sound_sources, scene)
     too_far_speakers = []
@@ -196,7 +225,8 @@ def partition_sounds_to_objects(scene, max_objects):
     return object_groups, too_far_speakers
 
 
-def generate_adm(context: bpy.types.Context, filepath: str, room_size: float, max_objects: int):
+def generate_adm(context: bpy.types.Context, filepath: str, room_size: float,
+                 max_objects: int) -> set[str]:
     scene = context.scene
 
     object_groups, _ = partition_sounds_to_objects(scene, max_objects)

intern/geom_utils.py

@@ -8,12 +8,13 @@ from numpy.linalg import norm
 
 from mathutils import Vector, Quaternion
 
+
 class FrameInterval:
     def __init__(self, start_frame, end_frame):
         self.start_frame = int(start_frame)
         self.end_frame = int(end_frame)
 
-    def overlaps(self, other : 'FrameInterval') -> bool:
+    def overlaps(self, other: 'FrameInterval') -> bool:
         return self.start_frame <= other.start_frame <= self.end_frame or \
             other.start_frame <= self.start_frame <= other.end_frame
 
@@ -33,7 +34,7 @@ def compute_relative_vector(camera: bpy.types.Camera, target: bpy.types.Object):
 
     # The camera's worldvector is norm to the horizon, we want a vector
     # down the barrel.
-    camera_correction = Quaternion( ( sqrt(2.) / 2. , sqrt(2.) / 2. , 0. , 0.) )
+    camera_correction = Quaternion((sqrt(2.) / 2., sqrt(2.) / 2., 0., 0.))
     relative_vector.rotate(camera_correction)
 
     return relative_vector
@@ -51,11 +52,11 @@ def room_norm_vector(vec, room_size=1.) -> Vector:
     The Pro Tools/Dolby Atmos workflow I am targeting uses "Room Centric" panner coordinates
     ("cartesian allocentric coordinates" in ADM speak) and this process seems to yield good
     results.
-    
+
     I also experimented with using normalized camera frame coordinates from the 
     bpy_extras.object_utils.world_to_camera_view method and this gives very good results as
     long as the object is on-screen; coordinates for objects off the screen are unusable.
-    
+
     In the future it would be worth exploring wether there's a way to produce ADM 
     coordinates that are "Screen-accurate" while the object is on-screen, but still gives
     sensible results when the object is off-screen as well.
@@ -67,19 +68,20 @@ def room_norm_vector(vec, room_size=1.) -> Vector:
         return vec / chebyshev
 
 
-def closest_approach_to_camera(scene, speaker_object) -> (float, int):
+def closest_approach_to_camera(scene, speaker_object) -> tuple[float, int]:
     """
     The distance and frame number of `speaker_object`s closest point to
     the scene's camera.
-    
+
     (Works for any object, not just speakers.)
     """
     max_dist = sys.float_info.max
     at_time = scene.frame_start
     for frame in range(scene.frame_start, scene.frame_end + 1):
         scene.frame_set(frame)
-        rel = speaker_object.matrix_world.to_translation() - scene.camera.matrix_world.to_translation()
-        dist = norm(rel)
+        rel = speaker_object.matrix_world.to_translation() - \
+            scene.camera.matrix_world.to_translation()
+        dist = float(norm(rel))
 
         if dist < max_dist:
             max_dist = dist
@@ -105,6 +107,10 @@ def speaker_active_time_range(speaker) -> FrameInterval:
 
 
 def speakers_by_min_distance(scene, speakers):
+    """
+    Sorts a list of speaker objects in ascending order by their closest
+    approach to the camera. Objects that approach closest are sorted highest.
+    """
     def min_distance(speaker):
         return closest_approach_to_camera(scene, speaker)[0]
 

intern/object_mix.py

@@ -31,7 +31,7 @@ def adm_object_rendering_context(scene: bpy.types.Scene):
 
 
 class ObjectMix:
-    def __init__(self, sources: List[bpy.types.Speaker],
+    def __init__(self, sources: List[bpy.types.Object],
                  scene: bpy.types.Scene, base_dir: str):
         self.sources = sources
         self.intermediate_filename = None
@@ -65,6 +65,7 @@ class ObjectMix:
 
     @property
     def mixdown_file_handle(self):
+        assert self.mixdown_filename
         if self._mixdown_file_handle is None:
             self._mixdown_file_handle = open(self.mixdown_filename, 'rb')
 
@@ -146,7 +147,7 @@ class ObjectMixPool:
     def __enter__(self):
         return self
 
-    def __exit__(self, exc_type, exc_val, exc_tb):
+    def __exit__(self, _exc_type, _exc_val, _exc_tb):
         for mix in self.object_mixes:
             mix.rm_mixdown()
 
@@ -156,7 +157,8 @@ class ObjectMixPool:
         return min(lengths)
 
 
-def object_mixes_from_source_groups(groups: List[List[bpy.types.Speaker]], scene, base_dir):
+def object_mixes_from_source_groups(groups: List[List[bpy.types.Object]], 
+                                    scene: bpy.types.Scene, base_dir: str):
     mixes = []
     for group in groups:
         mixes.append(ObjectMix(sources=group, scene=scene, base_dir=base_dir))

intern/speaker_utils.py

@@ -1,9 +1,12 @@
-def all_speakers(scene):
+import bpy 
+
+def all_speakers(scene: bpy.types.Scene) -> list[bpy.types.Object]:
     return [obj for obj in scene.objects if obj.type == 'SPEAKER']
 
 
-def solo_speakers(scene, solo_group):
+def solo_speakers(scene: bpy.types.Scene, solo_group: list[bpy.types.Object]):
     for speaker in all_speakers(scene):
+        assert type(speaker.data) is bpy.types.Speaker
         if speaker in solo_group:
             speaker.data.muted = False
         else:
@@ -14,5 +17,6 @@ def solo_speakers(scene, solo_group):
 
 def unmute_all_speakers(scene):
     for speaker in all_speakers(scene):
+        assert type(speaker.data) is bpy.types.Speaker
         speaker.data.muted = False
         speaker.data.update_tag()

operator_convert_particles_to_speakers.py

@@ -0,0 +1,86 @@
+## This is copied from
+## https://blender.stackexchange.com/questions/4956/convert-particle-system-to-animated-meshes?answertab=active#tab-top
+#
+# And needs to be adapted
+
+import bpy
+
+# Set these to False if you don't want to key that property.
+KEYFRAME_LOCATION = True
+KEYFRAME_ROTATION = True
+KEYFRAME_SCALE = True
+KEYFRAME_VISIBILITY = True  # Viewport and render visibility.
+
+def create_objects_for_particles(ps, obj):
+    # Duplicate the given object for every particle and return the duplicates.
+    # Use instances instead of full copies.
+    obj_list = []
+    mesh = obj.data
+    particles_coll = bpy.data.collections.new(name="particles")
+    bpy.context.scene.collection.children.link(particles_coll)
+
+    for i, _ in enumerate(ps.particles):
+        dupli = bpy.data.objects.new(
+                    name="particle.{:03d}".format(i),
+                    object_data=mesh)
+        particles_coll.objects.link(dupli)
+        obj_list.append(dupli)
+    return obj_list
+
+def match_and_keyframe_objects(ps, obj_list, start_frame, end_frame):
+    # Match and keyframe the objects to the particles for every frame in the
+    # given range.
+    for frame in range(start_frame, end_frame + 1):
+        print("frame {} processed".format(frame))
+        bpy.context.scene.frame_set(frame)
+        for p, obj in zip(ps.particles, obj_list):
+            match_object_to_particle(p, obj)
+            keyframe_obj(obj)
+
+def match_object_to_particle(p, obj):
+    # Match the location, rotation, scale and visibility of the object to
+    # the particle.
+    loc = p.location
+    rot = p.rotation
+    size = p.size
+    if p.alive_state == 'ALIVE':
+        vis = True
+    else:
+        vis = False
+    obj.location = loc
+    # Set rotation mode to quaternion to match particle rotation.
+    obj.rotation_mode = 'QUATERNION'
+    obj.rotation_quaternion = rot
+    obj.scale = (size, size, size)
+    obj.hide_viewport = not(vis) # <<<-- this was called "hide" in <= 2.79
+    obj.hide_render = not(vis)
+
+def keyframe_obj(obj):
+    # Keyframe location, rotation, scale and visibility if specified.
+    if KEYFRAME_LOCATION:
+        obj.keyframe_insert("location")
+    if KEYFRAME_ROTATION:
+        obj.keyframe_insert("rotation_quaternion")
+    if KEYFRAME_SCALE:
+        obj.keyframe_insert("scale")
+    if KEYFRAME_VISIBILITY:
+        obj.keyframe_insert("hide_viewport") # <<<-- this was called "hide" in <= 2.79
+        obj.keyframe_insert("hide_render")
+
+def main():
+    #in 2.8 you need to evaluate the Dependency graph in order to get data from animation, modifiers, etc
+    depsgraph = bpy.context.evaluated_depsgraph_get()
+
+    # Assume only 2 objects are selected.
+    # The active object should be the one with the particle system.
+    ps_obj = bpy.context.object
+    ps_obj_evaluated = depsgraph.objects[ ps_obj.name ]
+    obj = [obj for obj in bpy.context.selected_objects if obj != ps_obj][0]
+    ps = ps_obj_evaluated.particle_systems[0]  # Assume only 1 particle system is present.
+    start_frame = bpy.context.scene.frame_start
+    end_frame = bpy.context.scene.frame_end
+    obj_list = create_objects_for_particles(ps, obj)
+    match_and_keyframe_objects(ps, obj_list, start_frame, end_frame)
+
+if __name__ == '__main__':
+    main()

requirements_dev.txt

@@ -0,0 +1,40 @@
+asttokens==3.0.0
+attrs==21.4.0
+certifi==2025.10.5
+charset-normalizer==3.4.4
+cython==3.2.0
+decorator==5.2.1
+ear==2.1.0
+executing==2.2.1
+fake-bpy-module-4-3==20250130
+idna==3.11
+ipython==9.7.0
+ipython-pygments-lexers==1.1.1
+jedi==0.19.2
+lxml==4.9.4
+mathutils==3.3.0
+matplotlib-inline==0.2.1
+multipledispatch==0.6.0
+mypy==1.18.2
+mypy-extensions==1.1.0
+numpy==1.26.4
+parso==0.8.5
+pathspec==0.12.1
+pexpect==4.9.0
+pip==25.0.1
+prompt-toolkit==3.0.52
+ptyprocess==0.7.0
+pure-eval==0.2.3
+pygments==2.19.2
+requests==2.32.5
+ruamel-yaml==0.18.16
+ruamel-yaml-clib==0.2.14
+scipy==1.16.3
+setuptools==78.1.0
+six==1.17.0
+stack-data==0.6.3
+traitlets==5.14.3
+typing-extensions==4.15.0
+urllib3==2.5.0
+wcwidth==0.2.14
+zstandard==0.25.0