Question Audio crackling, latency

Sep 6, 2020
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Hello everyone! I recently put together my new pc and I came across audio problems. I updated audio drivers, bios and basically everything.
Here is the latencymon report:
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CONCLUSION
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Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. Also one or more ISR routines that belong to a driver running in your system appear to be executing for too long. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.
LatencyMon has been analyzing your system for 0:00:38 (h🇲🇲ss) on all processors.


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SYSTEM INFORMATION
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Computer name: DESKTOP-JUNJKSR
OS version: Windows 10, 10.0, version 2004, build: 19041 (x64)
Hardware: B365M DS3H, Gigabyte Technology Co., Ltd.
CPU: GenuineIntel Intel(R) Core(TM) i3-9100F CPU @ 3.60GHz
Logical processors: 4
Processor groups: 1
RAM: 8135 MB total


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CPU SPEED
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Reported CPU speed: 360 MHz

Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.


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MEASURED INTERRUPT TO USER PROCESS LATENCIES
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The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.

Highest measured interrupt to process latency (µs): 2526,40
Average measured interrupt to process latency (µs): 5,808576

Highest measured interrupt to DPC latency (µs): 2492,40
Average measured interrupt to DPC latency (µs): 2,827093


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REPORTED ISRs
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Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

Highest ISR routine execution time (µs): 3097,193889
Driver with highest ISR routine execution time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Highest reported total ISR routine time (%): 0,043605
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Total time spent in ISRs (%) 0,078712

ISR count (execution time <250 µs): 14580
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-1000 µs): 0
ISR count (execution time 1000-2000 µs): 0
ISR count (execution time 2000-4000 µs): 3
ISR count (execution time >=4000 µs): 0


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REPORTED DPCs
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DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.

Highest DPC routine execution time (µs): 6179,897778
Driver with highest DPC routine execution time: iaStorAC.sys - Intel(R) Rapid Storage Technology driver - x64, Intel Corporation

Highest reported total DPC routine time (%): 0,095897
Driver with highest DPC total execution time: iaStorAC.sys - Intel(R) Rapid Storage Technology driver - x64, Intel Corporation

Total time spent in DPCs (%) 0,170198

DPC count (execution time <250 µs): 63995
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-10000 µs): 2
DPC count (execution time 1000-2000 µs): 0
DPC count (execution time 2000-4000 µs): 4
DPC count (execution time >=4000 µs): 1


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REPORTED HARD PAGEFAULTS
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Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count: tiworker.exe

Total number of hard pagefaults 593
Hard pagefault count of hardest hit process: 353
Number of processes hit: 7


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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 1,016939
CPU 0 ISR highest execution time (µs): 3097,193889
CPU 0 ISR total execution time (s): 0,119250
CPU 0 ISR count: 14345
CPU 0 DPC highest execution time (µs): 6179,897778
CPU 0 DPC total execution time (s): 0,220970
CPU 0 DPC count: 53395
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CPU 1 Interrupt cycle time (s): 0,156761
CPU 1 ISR highest execution time (µs): 145,299444
CPU 1 ISR total execution time (s): 0,002067
CPU 1 ISR count: 238
CPU 1 DPC highest execution time (µs): 81,240556
CPU 1 DPC total execution time (s): 0,019992
CPU 1 DPC count: 4080
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CPU 2 Interrupt cycle time (s): 0,113823
CPU 2 ISR highest execution time (µs): 0,0
CPU 2 ISR total execution time (s): 0,0
CPU 2 ISR count: 0
CPU 2 DPC highest execution time (µs): 88,584444
CPU 2 DPC total execution time (s): 0,004967
CPU 2 DPC count: 1125
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CPU 3 Interrupt cycle time (s): 0,153152
CPU 3 ISR highest execution time (µs): 0,0
CPU 3 ISR total execution time (s): 0,0
CPU 3 ISR count: 0
CPU 3 DPC highest execution time (µs): 203,971111
CPU 3 DPC total execution time (s): 0,016394
CPU 3 DPC count: 5402
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SteveRX4

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Sep 29, 2020
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It says your biggest latency is 2.5mS.

But it also says your CPU is running at 360Hz. Is it?
If it's going this slow then you'd be bound to have problems.

There doesn't seem to be any info related to audio.
What audio problems are you having?
Your motherboard has - Realtek® ALC887 codec which should be fine.
 

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