さて、話はこれです。私は JDS Lab. C5D USB DAC を 1 年ほど所有していますが、昨日 Ubuntu 14.04 を試してみたくなりました。そこで、Ubuntu をインストールし、いくつかのアップデートを行って、DAC を接続しました (sudo alsa reloadおよびkillall pulseaudioコマンドを使用しました)。
「サウンド設定「メニューを開いてC5Dのアナログ出力を選択し、テストサウンドを試してみました。」左前" そして "右前方「音は次のように生成される」うーん、うーん" そして "うーん、うーん「音楽やビデオを再生してみましたが、結果は同じでした。」
DAC の問題でしょうか? Windows をロードしてから Kali Linux をロードしたところ、両方で完璧に動作しました。
Ubuntu に戻った後、システムが DAC を正しく認識しているかどうかを確認しようとしていたところ、いくつかのコマンドの出力は次のようになりました。
$ lsusb
Bus 002 Device 004: ID 1532:010d Razer USA, Ltd
Bus 002 Device 008: ID 262a:1120 <-------------THIS IS C5D
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
Bus 001 Device 004: ID 0480:a207 Toshiba America Info. Systems, Inc.
Bus 001 Device 003: ID 1038:1369 Ideazon, Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: DS [Xonar DS], device 0: Multichannel [Multichannel]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: DS [Xonar DS], device 1: Digital [Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC889 Analog [ALC889 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 1: ALC889 Digital [ALC889 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: DAC [C5D Amp DAC], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ aplay -L
default
Playback/recording through the PulseAudio sound server
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
sysdefault:CARD=DS
Xonar DS, Multichannel
Default Audio Device
front:CARD=DS,DEV=0
Xonar DS, Multichannel
Front speakers
surround40:CARD=DS,DEV=0
Xonar DS, Multichannel
4.0 Surround output to Front and Rear speakers
surround41:CARD=DS,DEV=0
Xonar DS, Multichannel
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DS,DEV=0
Xonar DS, Multichannel
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DS,DEV=0
Xonar DS, Multichannel
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DS,DEV=0
Xonar DS, Multichannel
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DS,DEV=0
Xonar DS, Multichannel
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=DS,DEV=0
Xonar DS, Multichannel
Direct sample mixing device
dmix:CARD=DS,DEV=1
Xonar DS, Digital
Direct sample mixing device
dsnoop:CARD=DS,DEV=0
Xonar DS, Multichannel
Direct sample snooping device
dsnoop:CARD=DS,DEV=1
Xonar DS, Digital
Direct sample snooping device
hw:CARD=DS,DEV=0
Xonar DS, Multichannel
Direct hardware device without any conversions
hw:CARD=DS,DEV=1
Xonar DS, Digital
Direct hardware device without any conversions
plughw:CARD=DS,DEV=0
Xonar DS, Multichannel
Hardware device with all software conversions
plughw:CARD=DS,DEV=1
Xonar DS, Digital
Hardware device with all software conversions
sysdefault:CARD=PCH
HDA Intel PCH, ALC889 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
Front speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Digital
IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=PCH,DEV=0
HDA Intel PCH, HDMI 0
HDMI Audio Output
dmix:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
Direct sample mixing device
dmix:CARD=PCH,DEV=1
HDA Intel PCH, ALC889 Digital
Direct sample mixing device
dmix:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
Direct sample snooping device
dsnoop:CARD=PCH,DEV=1
HDA Intel PCH, ALC889 Digital
Direct sample snooping device
dsnoop:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Direct sample snooping device
hw:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
Direct hardware device without any conversions
hw:CARD=PCH,DEV=1
HDA Intel PCH, ALC889 Digital
Direct hardware device without any conversions
hw:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
HDA Intel PCH, ALC889 Analog
Hardware device with all software conversions
plughw:CARD=PCH,DEV=1
HDA Intel PCH, ALC889 Digital
Hardware device with all software conversions
plughw:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Hardware device with all software conversions
hdmi:CARD=NVidia,DEV=0
HDA NVidia, HDMI 0
HDMI Audio Output
hdmi:CARD=NVidia,DEV=1
HDA NVidia, HDMI 0
HDMI Audio Output
hdmi:CARD=NVidia,DEV=2
HDA NVidia, HDMI 0
HDMI Audio Output
hdmi:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
HDMI Audio Output
dmix:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct sample mixing device
dmix:CARD=NVidia,DEV=7
HDA NVidia, HDMI 0
Direct sample mixing device
dmix:CARD=NVidia,DEV=8
HDA NVidia, HDMI 0
Direct sample mixing device
dmix:CARD=NVidia,DEV=9
HDA NVidia, HDMI 0
Direct sample mixing device
dsnoop:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct sample snooping device
dsnoop:CARD=NVidia,DEV=7
HDA NVidia, HDMI 0
Direct sample snooping device
dsnoop:CARD=NVidia,DEV=8
HDA NVidia, HDMI 0
Direct sample snooping device
dsnoop:CARD=NVidia,DEV=9
HDA NVidia, HDMI 0
Direct sample snooping device
hw:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct hardware device without any conversions
hw:CARD=NVidia,DEV=7
HDA NVidia, HDMI 0
Direct hardware device without any conversions
hw:CARD=NVidia,DEV=8
HDA NVidia, HDMI 0
Direct hardware device without any conversions
hw:CARD=NVidia,DEV=9
HDA NVidia, HDMI 0
Direct hardware device without any conversions
plughw:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Hardware device with all software conversions
plughw:CARD=NVidia,DEV=7
HDA NVidia, HDMI 0
Hardware device with all software conversions
plughw:CARD=NVidia,DEV=8
HDA NVidia, HDMI 0
Hardware device with all software conversions
plughw:CARD=NVidia,DEV=9
HDA NVidia, HDMI 0
Hardware device with all software conversions
sysdefault:CARD=DAC
C5D Amp DAC, USB Audio
Default Audio Device
front:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
Front speakers
surround40:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
Direct sample mixing device
dsnoop:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
Direct sample snooping device
hw:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
Direct hardware device without any conversions
plughw:CARD=DAC,DEV=0
C5D Amp DAC, USB Audio
Hardware device with all software conversions
DACは正常に認識されました。
何か提案はありますか？私の英語が下手ですみません ;)
答え1
Ubuntu 14.04 では C5D に問題はありません。PulseAudio にはdaemon.conf次の変更が加えられています。試してみて、問題が解決するかどうかを確認してください。
default-sample-format = s24le
default-sample-rate = 48000