+ _sound_asset.reset (new libdcp::SoundAsset (_film->dir (_film->dcp_name()), _film->audio_mxf_filename ()));
+ _sound_asset->set_edit_rate (_film->video_frame_rate ());
+ _sound_asset->set_channels (_film->audio_channels ());
+ _sound_asset->set_sampling_rate (_film->audio_frame_rate ());
+
+ if (_film->encrypted ()) {
+ _sound_asset->set_key (_film->key ());
+ }
+
+ _sound_asset_writer = _sound_asset->start_write ();