USB DAC에서 약간의 딸깍거리는 소음이 발생합니다.

USB DAC에서 약간의 딸깍거리는 소음이 발생합니다.

좋아요, 이야기는 이렇습니다. JDS 연구소가 있습니다. C5D USB DAC를 1년 정도 사용했는데, 어제는 Ubuntu 14.04를 사용해 보고 싶었습니다. 그래서 Ubuntu를 설치하고 일부 업데이트를 수행했으며 DAC를 연결했습니다( sudo alsa reloadkillall pulseaudio명령이 사용되었습니다).

"에 들어간 후사운드 설정" 메뉴에서 C5D용 Analog Output을 선택하고 사운드 테스트를 해보았습니다. "왼쪽 앞" 그리고 "오른쪽 앞" 소리는 다음과 같이 생성됩니다 "으르르르르르르" 그리고 "으르르르르르르르". 심지어 음악과 비디오를 재생해 보았지만 결과는 같았습니다.

어쩌면 DAC 문제일까요? 그래서 Windows를 로드한 다음 Kali Linux를 로드했는데 둘 다 완벽하게 작동했습니다.

Ubuntu로 돌아온 후 시스템이 DAC를 올바르게 인식하는지 확인하려고 했기 때문에 일부 명령에 대한 출력은 다음과 같습니다.

$ 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

그러면 DAC가 제대로 인식됩니다.

어떤 제안 친구? 그리고 내 영어가 서툴러서 미안해요 ;)

답변1

Ubuntu 14.04의 C5D에는 문제가 없습니다. 내 PulseAudio daemon.conf에는 다음과 같은 변경 사항이 있습니다. 이를 통해 문제가 해결되는지 확인할 수 있습니다.

default-sample-format = s24le
default-sample-rate = 48000

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