カットシーンでキャラクターボイスだけが異常に小さくなる

発生日時：2017.10.10
発生頻度：4.1以降いつでも、紀行録でも同じ
パーティメンバーの有無：無
手順：
メイン進行中のカットシーンボイス全て。（イヤホンだと微かに聞こえる）
紀行録で新生時のを再生しても同じ現象が起きる。
ボイスのボリュームは１００．その他の音は普通に聞こえる。
PC環境
-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

SYSTEM_OS Windows 10 Pro 64 ビット (6.2, ビルド 9200) (15063.rs2_release.170317-1834)
SYSTEM_CPU Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (8 CPUs), ~4.0GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 8 SYSTEM_CORE_PHYSICS 4
SYSTEM_BIOS BIOS Date: 09/19/16 21:22:54 Ver: 05.0000B
SYSTEM_LANGUAGE 日本語 (地域設定: 日本語)
SYSTEM_MEMORY 32686.137MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 37550.137MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 488.071GB SYSTEM_FREEDISC_SPACE 382.383GB
SYSTEM_STORAGE D:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 488.280GB SYSTEM_FREEDISC_SPACE 413.718GB
SYSTEM_STORAGE E:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1374.732GB SYSTEM_FREEDISC_SPACE 311.300GB
SYSTEM_STORAGE F:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1863.015GB SYSTEM_FREEDISC_SPACE 1860.806GB
SYSTEM_STORAGE G:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1397.263GB SYSTEM_FREEDISC_SPACE 758.229GB
SYSTEM_STORAGE H:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 2794.487GB SYSTEM_FREEDISC_SPACE 2216.525GB
SYSTEM_STORAGE I:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 3725.990GB SYSTEM_FREEDISC_SPACE 499.721GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1080
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 1080
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 8110.688 MB
SYSTEM_GRAPHICS_SHARED_VRAM 16343.068 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 2560 x 1440 (32 bit) (59Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 22.21.0013.8253
SYSTEM_GRAPHICS_DRIVER_DATE 6/7/2017 09:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE 英語
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1080
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY2
SYSTEM_GRAPHICS_CHIP GeForce GTX 1080
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 8110.688 MB
SYSTEM_GRAPHICS_SHARED_VRAM 16343.068 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_2d81f3535ced17c6\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 22.21.0013.8253
SYSTEM_GRAPHICS_DRIVER_DATE 6/7/2017 09:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE 英語
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND スピーカー (Logicool G633 Gaming Headset)
SYSTEM_SOUND_DEVICE_ID {71D0E437-EB64-4599-A319-191D4973FE6F}
SYSTEM_SOUND_DEVICE_NAME USBAUDIO.sys
SYSTEM_SOUND_DRIVER_VERSION 6.02.15063.0000
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 12/8/2016 00:00:00
SYSTEM_SOUND Realtek Digital Output(Optical) (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {2B36B1C9-6D3D-44E1-A6E2-5C20A5FE6E10}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.7727
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 1/22/2016 00:00:00
SYSTEM_SOUND Realtek Digital Output (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {2F5FD85E-00BE-401B-BB81-A60F6ECF2C02}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.7727
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 1/22/2016 00:00:00
SYSTEM_SOUND スピーカー (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {EF14C3B6-464B-4EC7-9713-F0B3A8A11F2F}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.7727
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 1/22/2016 00:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME マウス
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 8 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME キーボード
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 109 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {97D9F4D0-CEA8-11E6-8001444553540000}
SYSTEM_INPUT_NAME Microsoft Internet Keyboard Pro Hot Keys
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {97DA1BE0-CEA8-11E6-8003444553540000}
SYSTEM_INPUT_NAME EIZO USB HID Monitor
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {FE3DA5E0-2E94-11E7-8001444553540000}
SYSTEM_INPUT_NAME Logitech G633 Gaming Headset
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 2 SYSTEM_GAMEPAD_BUTTON 9 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {FE3DCCF0-2E94-11E7-8002444553540000}
SYSTEM_INPUT_NAME Logitech G633 Gaming Headset
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {FE3DCCF0-2E94-11E7-8003444553540000}
SYSTEM_INPUT_NAME Logitech G633 Gaming Headset
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {43A0DFF0-54E5-11E7-8002444553540000}
SYSTEM_INPUT_NAME JC-P301U
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 5 SYSTEM_GAMEPAD_BUTTON 12 SYSTEM_GAMEPAD_FOV 1
SYSTEM_INPUT {97DF7310-CEA8-11E6-8007444553540000}
SYSTEM_INPUT_NAME Microsoft Internet Keyboard Pro Hot Keys
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 573 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {28C25480-94C2-11E7-8001444553540000}
SYSTEM_INPUT_NAME G500
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 652 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {28C25480-94C2-11E7-8002444553540000}
SYSTEM_INPUT_NAME G500
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {28C27B90-94C2-11E7-8003444553540000}
SYSTEM_INPUT_NAME G500
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0

こちらも同じ状況になりました。
共通点としてはロジクールのサラウンドヘッドセットを使ってるという点ですか。
こちらはG35ヘッドセット、ゲームソフトウェアのバージョンは8.96.81です。

-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

SYSTEM_OS Windows 10 Pro 64 ビット (6.2, ビルド 9200) (15063.rs2_release.170317-1834)
SYSTEM_CPU Intel(R) Core(TM) i5-4690 CPU @ 3.50GHz (4 CPUs), ~3.5GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 4 SYSTEM_CORE_PHYSICS 4
SYSTEM_BIOS F7
SYSTEM_LANGUAGE 日本語 (地域設定: 日本語)
SYSTEM_MEMORY 24515.152MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 25315.152MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 463.860GB SYSTEM_FREEDISC_SPACE 343.345GB
SYSTEM_STORAGE D:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1758.367GB SYSTEM_FREEDISC_SPACE 1258.440GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce GTX 960
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 960
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 2016.688 MB
SYSTEM_GRAPHICS_SHARED_VRAM 12257.576 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_d0a31ff5946203b6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_d0a31ff5946203b6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_d0a31ff5946203b6\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_d0a31ff5946203b6\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 23.21.0013.8792
SYSTEM_GRAPHICS_DRIVER_DATE 10/6/2017 09:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE 英語
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND スピーカー (Logicool G35 Gaming Headset)
SYSTEM_SOUND_DEVICE_ID {EEDDFB68-231A-490F-A43A-D60747D52B2C}
SYSTEM_SOUND_DEVICE_NAME USBAUDIO.sys
SYSTEM_SOUND_DRIVER_VERSION 6.02.15063.0000
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 4/28/2017 00:00:00
SYSTEM_SOUND スピーカー (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {9AD9E32C-9924-48A5-8FBE-61DB4504F9A7}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.7256
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 5/28/2014 00:00:00
SYSTEM_SOUND Realtek Digital Output (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {C436E53F-F650-4E46-8AF3-8E6C842CA3CA}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.7256
SYSTEM_SOUND_DRIVER_LANGUAGE 英語
SYSTEM_SOUND_DRIVER_DATE 5/28/2014 00:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME マウス
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 8 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME キーボード
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 109 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {C1EBC2E0-F5FE-11E5-8001444553540000}
SYSTEM_INPUT_NAME G13
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {750A6E70-9F0C-11E5-8001444553540000}
SYSTEM_INPUT_NAME Logitech G710 Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 7 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {A3B08740-A304-11E5-8001444553540000}
SYSTEM_INPUT_NAME Gaming Mouse G600
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {750A9580-9F0C-11E5-8002444553540000}
SYSTEM_INPUT_NAME HID 準拠ベンダー定義デバイス
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {C1EC3810-F5FE-11E5-8002444553540000}
SYSTEM_INPUT_NAME Logicool G13 Joystick
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 2 SYSTEM_GAMEPAD_BUTTON 1 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {C9C17000-C218-11E6-8003444553540000}
SYSTEM_INPUT_NAME Logicool Dual Action USB
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 4 SYSTEM_GAMEPAD_BUTTON 12 SYSTEM_GAMEPAD_FOV 1
SYSTEM_INPUT {F03D9E50-54FC-11E5-800F444553540000}
SYSTEM_INPUT_NAME Logicool G35 Headset
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 5 SYSTEM_GAMEPAD_FOV 0