Comment 13 for bug 1716654

Revision history for this message
Henk717 (henk717) wrote :

Having the same issue on the MSI X370 Gaming Pro Carbon, audio is fine but the microphone is having weird behavior that differs depending on configuration.

When audacity is launched it will trigger the bug that increases the recording speed to be insanely high pitched and fast. Prior to using audacity i will hear a robotic noise while speaking that is also present as a robotic echo.

Making use of the tsched=0 the robotic distortion is gone but replaced with severe crackling that over time becomes less severe but still very notable.

The following is an export of the alsa source.

    index: 1
 name: <alsa_input.pci-0000_21_00.3.analog-stereo>
 driver: <module-alsa-card.c>
 flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
 state: RUNNING
 suspend cause:
 priority: 9039
 volume: front-left: 32768 / 50% / -18,06 dB, front-right: 32768 / 50% / -18,06 dB
         balance 0,00
 base volume: 6554 / 10% / -60,00 dB
 volume steps: 65537
 muted: no
 current latency: 0,22 ms
 max rewind: 0 KiB
 sample spec: s16le 2ch 48000Hz
 channel map: front-left,front-right
              Stereo
 used by: 1
 linked by: 1
 configured latency: 2,50 ms; range is 0,50 .. 1837,33 ms
 card: 1 <alsa_card.pci-0000_21_00.3>
 module: 8
 properties:
  alsa.resolution_bits = "16"
  device.api = "alsa"
  device.class = "sound"
  alsa.class = "generic"
  alsa.subclass = "generic-mix"
  alsa.name = "ALC1220 Analog"
  alsa.id = "ALC1220 Analog"
  alsa.subdevice = "0"
  alsa.subdevice_name = "subdevice #0"
  alsa.device = "0"
  alsa.card = "1"
  alsa.card_name = "HD-Audio Generic"
  alsa.long_card_name = "HD-Audio Generic at 0xfe900000 irq 64"
  alsa.driver_name = "snd_hda_intel"
  device.bus_path = "pci-0000:21:00.3"
  sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:21:00.3/sound/card1"
  device.bus = "pci"
  device.vendor.id = "1022"
  device.vendor.name = "Advanced Micro Devices, Inc. [AMD]"
  device.product.id = "1457"
  device.product.name = "Family 17h (Models 00h-0fh) HD Audio Controller"
  device.string = "front:1"
  device.buffering.buffer_size = "352768"
  device.buffering.fragment_size = "176384"
  device.access_mode = "mmap+timer"
  device.profile.name = "analog-stereo"
  device.profile.description = "Analog Stereo"
  device.description = "Family 17h (Models 00h-0fh) HD Audio Controller Analog Stereo"
  alsa.mixer_name = "Realtek ALC1220"
  alsa.components = "HDA:10ec1220,1462da32,00100003"
  module-udev-detect.discovered = "1"
  device.icon_name = "audio-card-pci"
 ports:
  analog-input-front-mic: Front Microphone (priority 8500, latency offset 0 usec, available: yes)
   properties:
    device.icon_name = "audio-input-microphone"
  analog-input-rear-mic: Rear Microphone (priority 8200, latency offset 0 usec, available: no)
   properties:
    device.icon_name = "audio-input-microphone"
  analog-input-linein: Line In (priority 8100, latency offset 0 usec, available: no)
   properties:

Very notable here is the buffer size which falls short of the required buffer size 44800 while in Windows the card can go up to 24-bit , 192000 without having to resort to a third party driver.