Dell Inspiron 3501 Audio crackles on Ubuntu 20.04

[Rahim]

Recently I bought a new Inspiron 3501, and it came pre-installed with Windows 10. I wanted to try Ubuntu linux on it so, I dual-booted Ubuntu 20.04 on it to check if everything is working fine. After installation, everything is working fine except the audio output. The sound kind of crackles. It works perfectly fine on windows though. I tested inbuilt speakers, Bluetooth headset, and output from 3.5 mm audio jack but no difference. I tried youtube videos and local audio and video files but the outcome is the same. I tried many online solutions but without any success. I also installed Ubuntu 21.04, to check if the new kernel brings any improvement but the condition was the same. Don't know how to fix this issue. Any help is appreciated.

Hardware specs:

Processor: 11th Generation Intel Core i5-1135G7
RAM: 16 GB DDR4
Audio: Cirrus Logic CS8409 (CS42L42 + SN005825)
Storage: 256 GB SSD + 1 TB HDD
Display 15.6 Inch 1920x1080 FHD
GPU: Integrated Intel Iris Xe Graphics

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.11
ProcVersionSignature: Ubuntu 5.11.0-37.41~20.04.2-generic 5.11.22
Uname: Linux 5.11.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rahim 1445 F.... pulseaudio
 /dev/snd/pcmC0D0c: rahim 1445 F...m pulseaudio
 /dev/snd/pcmC0D0p: rahim 1445 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 13 15:58:01 2021
InstallationDate: Installed on 2021-10-11 (1 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
SourcePackage: pulseaudio
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_PulseAudioLog:
 Oct 13 15:41:41 rahim-Inspiron-3501 dbus-daemon[758]: [system] Activating via systemd: service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' requested by ':1.28' (uid=125 pid=990 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined")
 Oct 13 15:42:26 rahim-Inspiron-3501 systemd[961]: pulseaudio.service: Succeeded.
 Oct 13 15:42:36 rahim-Inspiron-3501 systemd[961]: pulseaudio.socket: Succeeded.
Symptom_PulsePlaybackTest: PulseAudio playback test failed
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [Inspiron 3501, Cirrus Logic CS8409/CS42L42, Speaker, Internal] Underruns, dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/19/2021
dmi.bios.release: 1.8
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.8.0
dmi.board.name: 0XGX0C
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.8.0:bd07/19/2021:br1.8:svnDellInc.:pnInspiron3501:pvr:sku0A25:rvnDellInc.:rn0XGX0C:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 3501
dmi.product.sku: 0A25
dmi.sys.vendor: Dell Inc.