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My pc is a somewhat old Lenovo Ideacenter K410 tower. It originally came with Win7 preloaded. I updated the OS to Xubuntu 16.04 LTS and have been using that for 2+ years, but have JUST RECENTLY updated to 17.10.1. I tried using a USB audio interface, and each time I plugged it in, it seemed to freeze all audio on my pc. I tried rebooting with the device plugged in and with it unplugged, with the exact same frozen audio result. So I tried the following:

sudo apt-get remove alsa-base pulseaudio

sudo apt-get purge alsa-base pulseaudio

sudo apt-get install alsa-base pulseaudio

sudo start-pulseaudio-x11 start

None of that seemed to fix the audio issues. Now the audio seems to work barely, but with what sounds like Reverb always on, or maybe surround sound always on. I can't hear an mp3 song file fully - I hear the guitars, drums, but the singer sounds like they're on a different channel. Youtube playback sounds like it's underwater, with gurgling water sounds. It's really strange.

Ergo, why I upgraded to Xubuntu 17.10.1, I thought upgrading to a newer version would fix said audio issues. IT DIDN'T. The audio is still acting the same way.

I mostly use a 2-channel headphone plugged into the front, but have 5.1 audio output on the back from the motherboard that I rarely ever use.

Here is the output using the following terminal commands:

$ sudo aplay -l

**** List of PLAYBACK Hardware Devices ****

card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]

  Subdevices: 1/1

  Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]

  Subdevices: 1/1

  Subdevice #0: subdevice #0

---------------------------



$ sudo lspci -v | grep -A7 -i "audio"

00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)

    Subsystem: Lenovo 6 Series/C200 Series Chipset Family High Definition Audio Controller

    Flags: bus master, fast devsel, latency 0, IRQ 30

    Memory at f7d00000 (64-bit, non-prefetchable) [size=16K]

    Capabilities: [50] Power Management version 2

    Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+

    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00

    Capabilities: [100] Virtual Channel

    Capabilities: [130] Root Complex Link

---------------------------



$ cat /proc/asound/version

Advanced Linux Sound Architecture Driver Version k4.13.0-32-generic.

--------------------------



$ cat /proc/asound/card0/codec#* | grep Codec

Codec: Realtek ALC662 rev3

Codec: Intel CougarPoint HDMI

-------------------------



$ cat /proc/asound/cards

 0 [PCH            ]: HDA-Intel - HDA Intel PCH

                      HDA Intel PCH at 0xf7d00000 irq 30

 1 [U0x46d0x9a4    ]: USB-Audio - USB Device 0x46d:0x9a4

                      USB Device 0x46d:0x9a4 at usb-0000:00:1a.0-1.4, high speed

-------------------------



$ lsusb

Bus 002 Device 005: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth

Bus 002 Device 006: ID 0480:0212 Toshiba America Inc 

Bus 002 Device 004: ID 05e3:0608 Genesys Logic, Inc. Hub

Bus 002 Device 003: ID 0bda:0184 Realtek Semiconductor Corp. RTS5182 Card Reader

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 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 004: ID 046d:09a4 Logitech, Inc. QuickCam E 3500

Bus 001 Device 003: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS

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

-------------------------



$ pactl list short sources

0   alsa_input.usb-046d_09a4_1D90F520-02.analog-mono    module-alsa-card.c  s16le 1ch 16000Hz   SUSPENDED

1   alsa_output.pci-0000_00_1b.0.analog-stereo.monitor  module-alsa-card.c  s16le 2ch 44100Hz   SUSPENDED

-------------------------



$ pactl list short sinks

0   alsa_output.pci-0000_00_1b.0.analog-stereo  module-alsa-card.c  s16le 2ch 44100Hz   SUSPENDED

-------------------------



$ pacmd list-sinks

1 sink(s) available.

  * index: 0

    name: <alsa_output.pci-0000_00_1b.0.analog-stereo>

    driver: <module-alsa-card.c>

    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY

    state: SUSPENDED

    suspend cause: IDLE 

    priority: 9959

    volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB

            balance 0.00

    base volume: 65536 / 100% / 0.00 dB

    volume steps: 65537

    muted: no

    current latency: 0.00 ms

    max request: 0 KiB

    max rewind: 0 KiB

    monitor source: 1

    sample spec: s16le 2ch 44100Hz

    channel map: front-left,front-right

                 Stereo

    used by: 0

    linked by: 0

    configured latency: 0.00 ms; range is 0.50 .. 371.52 ms

    card: 1 <alsa_card.pci-0000_00_1b.0>

    module: 7

    properties:

        alsa.resolution_bits = "16"

        device.api = "alsa"

        device.class = "sound"

        alsa.class = "generic"

        alsa.subclass = "generic-mix"

        alsa.name = "ALC662 rev3 Analog"

        alsa.id = "ALC662 rev3 Analog"

        alsa.subdevice = "0"

        alsa.subdevice_name = "subdevice #0"

        alsa.device = "0"

        alsa.card = "0"

        alsa.card_name = "HDA Intel PCH"

        alsa.long_card_name = "HDA Intel PCH at 0xf7d00000 irq 30"

        alsa.driver_name = "snd_hda_intel"

        device.bus_path = "pci-0000:00:1b.0"

        sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"

        device.bus = "pci"

        device.vendor.id = "8086"

        device.vendor.name = "Intel Corporation"

        device.product.id = "1c20"

        device.product.name = "6 Series/C200 Series Chipset Family High Definition Audio Controller"

        device.form_factor = "internal"

        device.string = "front:0"

        device.buffering.buffer_size = "65536"

        device.buffering.fragment_size = "32768"

        device.access_mode = "mmap+timer"

        device.profile.name = "analog-stereo"

        device.profile.description = "Analog Stereo"

        device.description = "Built-in Audio Analog Stereo"

        alsa.mixer_name = "Realtek ALC662 rev3"

        alsa.components = "HDA:10ec0662,17aa3653,00100300 HDA:80862805,80860101,00100000"

        module-udev-detect.discovered = "1"

        device.icon_name = "audio-card-pci"

    ports:

        analog-output-lineout: Line Out (priority 9900, latency offset 0 usec, available: no)

            properties:



        analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: yes)

            properties:

                device.icon_name = "audio-headphones"

    active port: <analog-output-headphones>

---------------------------------

Any help is always graciously & humbly received. Since using Xubuntu exclusively for the past 2+ years, I really couldn't have kept at it without AskUbuntu's help. Thank you all for all the answers over the years.

So. What's up with my audio? Why am I hearing what sounds like Reverb with everything played? I have NOT added any sort of audio effects.

I am considering editing the following file, based on the instructions provided here:
https://ubuntuforums.org/showthread.php?t=1043568

sudo gedit /etc/modprobe.d/alsa-base.conf

# add at the very bottom of the page 

options snd-hda-intel model=lenovo-3000 position_fix=1

I'll post an update if this fixes the problem.

UPDATE (1-2018):

1. I applied the following edit:


2. sudo gedit /etc/modprobe.d/alsa-base.conf


3. << add at the very bottom of the page >>


4. options snd-hda-intel model=lenovo 3stack-6ch-dig position_fix=1

I discovered if I adjust the BALANCE (using GNOME Alsa Mixer or Qasmixer) all the way RIGHT or LEFT, the audio sounds correct & centered, and the reverb & underwater effect goes away, even Youtube videos sound correct.

Not sure if this Update is the proverbial FIX. I mean, why would I need to adjust the BALANCE all the way RIGHT or LEFT?

NEW UPDATE (2-2018):

I just discovered the audio works great with the headphones ONLY, But only the left channel works with the pc speakers. The right channel is completely dead using the pc speakers.

I do not have answer, but just like to know if there any more things to try? I have the same problem with my new laptop today and yes, adjusting balance all the way RIGHT or LEFT fixes it.

so the alternative is to remove the webcam?