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.
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https://bugs.launchpad.net/bugs/1716654
Title:
[System Product Name, Realtek ALC1220, Pink Mic, Rear] Underruns,
dropouts or crackling sound
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