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Rze1 Honor Student
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Audio artifacts with apollo thunderbolt

Spectre X360
Microsoft Windows 10 (64-bit)

I bought the spectre x360 13 ae015nd for music production. Now when connecting the x360 through the startech or the apple thunderbolt 3 to 2 adapter(bought both cause I thought the problem might be the adapter) to my UAD Apollo twin duo thunderbolt, all the audio (no matter which program plays the audio) comes through with a lot of clicks pops and artifacts. Ive already tried lowering the buffer size, downloading the latest drivers/bios and switching ports to no avail. The apollo soundcard works flawlessly with my old macbook so the soundcard is not the problem. Can someone help me out? Thnx in advance

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Rze1 Honor Student
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Audio artifacts with apollo thunderbolt

I've been emailing back and forth with UAD, we've tried a lot of things from changing power managment to high performance to installing the latest drivers, running latencymon to see where problem comes from. To no avail. Latencymon says something about the DPC routines causing latency. Can someone help me out please? I just bought this laptop brand new. Here are the latencymon test results. 

 

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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. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results. 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 0:16:34 (h:mm:ss) on all processors.


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SYSTEM INFORMATION
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Computer name: DESKTOP-9EVMJF8
OS version: Windows 10 , 10.0, build: 16299 (x64)
Hardware: HP Spectre x360 Convertible 13-ae0xx, HP, 83B9
CPU: GenuineIntel Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
Logical processors: 8
Processor groups: 1
RAM: 16229 MB total


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CPU SPEED
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Reported CPU speed: 1992 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): 8301,997363
Average measured interrupt to process latency (µs): 15,401201

Highest measured interrupt to DPC latency (µs): 8271,154029
Average measured interrupt to DPC latency (µs): 6,462145


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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): 638,529618
Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation

Highest reported total ISR routine time (%): 0,406288
Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation

Total time spent in ISRs (%) 0,413134

ISR count (execution time <250 µs): 1008727
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 555
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
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): 1547,641566
Driver with highest DPC routine execution time: ACPI.sys - ACPI-stuurprogramma voor NT, Microsoft Corporation

Highest reported total DPC routine time (%): 0,532682
Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation

Total time spent in DPCs (%) 1,058354

DPC count (execution time <250 µs): 4506824
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 45268
DPC count (execution time 1000-1999 µs): 188
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0


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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.


Process with highest pagefault count: none

Total number of hard pagefaults 0
Hard pagefault count of hardest hit process: 0
Highest hard pagefault resolution time (µs): 0,0
Total time spent in hard pagefaults (%): 0,0
Number of processes hit: 0


_________________________________________________________________________________________________________
PER CPU DATA
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CPU 0 Interrupt cycle time (s): 133,736975
CPU 0 ISR highest execution time (µs): 638,529618
CPU 0 ISR total execution time (s): 30,161213
CPU 0 ISR count: 865510
CPU 0 DPC highest execution time (µs): 1543,962349
CPU 0 DPC total execution time (s): 54,811793
CPU 0 DPC count: 3845466
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CPU 1 Interrupt cycle time (s): 72,783278
CPU 1 ISR highest execution time (µs): 581,759538
CPU 1 ISR total execution time (s): 1,465574
CPU 1 ISR count: 78081
CPU 1 DPC highest execution time (µs): 1431,372992
CPU 1 DPC total execution time (s): 15,727673
CPU 1 DPC count: 300754
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CPU 2 Interrupt cycle time (s): 58,075154
CPU 2 ISR highest execution time (µs): 560,495984
CPU 2 ISR total execution time (s): 1,105068
CPU 2 ISR count: 60870
CPU 2 DPC highest execution time (µs): 1396,950301
CPU 2 DPC total execution time (s): 8,686852
CPU 2 DPC count: 143428
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CPU 3 Interrupt cycle time (s): 51,37910
CPU 3 ISR highest execution time (µs): 393,359438
CPU 3 ISR total execution time (s): 0,121847
CPU 3 ISR count: 4738
CPU 3 DPC highest execution time (µs): 1547,641566
CPU 3 DPC total execution time (s): 1,510463
CPU 3 DPC count: 55427
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CPU 4 Interrupt cycle time (s): 42,496025
CPU 4 ISR highest execution time (µs): 163,483936
CPU 4 ISR total execution time (s): 0,002334
CPU 4 ISR count: 83
CPU 4 DPC highest execution time (µs): 975,635040
CPU 4 DPC total execution time (s): 0,953067
CPU 4 DPC count: 64895
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CPU 5 Interrupt cycle time (s): 48,226374
CPU 5 ISR highest execution time (µs): 0,0
CPU 5 ISR total execution time (s): 0,0
CPU 5 ISR count: 0
CPU 5 DPC highest execution time (µs): 889,073293
CPU 5 DPC total execution time (s): 0,523013
CPU 5 DPC count: 33162
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CPU 6 Interrupt cycle time (s): 47,741572
CPU 6 ISR highest execution time (µs): 0,0
CPU 6 ISR total execution time (s): 0,0
CPU 6 ISR count: 0
CPU 6 DPC highest execution time (µs): 1084,379016
CPU 6 DPC total execution time (s): 1,165935
CPU 6 DPC count: 68641
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CPU 7 Interrupt cycle time (s): 51,693593
CPU 7 ISR highest execution time (µs): 0,0
CPU 7 ISR total execution time (s): 0,0
CPU 7 ISR count: 0
CPU 7 DPC highest execution time (µs): 833,456325
CPU 7 DPC total execution time (s): 0,790707
CPU 7 DPC count: 40507
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