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Old 1st January 2018, 02:50 AM   #1
DDF is offline DDF  Canada
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Location: Ottawa
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I recently struggled with a difficult click/pop issue with an external dac, and found a fix (in my case, it required replacing the laptop power supply).

I thought I'd share the results of my investigation here. Hopefully it may help others struggling with similar issues

DPC latency checker DPC Latency Checker
- Look for DPC latency spikes. If they coincide with glitches:
Latency Mon Resplendence Software - LatencyMon: suitability checker for real-time audio and other tasks
- Use it to find drivers that cause excess dpc latency and focus on fixing these: go to drivers tab, sort under highest execution (ms)
- List of common driver issues: https://www.sweetwater.com/sweetcare...atency-issues/

Fixed Windows 7 Sound (Popping, Cracking & Skipping) | Corey DeGrandchamp
- Playback devices-> choose dac-> properties-> enhancements tab->disable all sound effects
- if both the ethernet port and wireless were active at the same time, I would get multiple svchost.exe spikes and the system would skip. I use wireless at my house so I disabled the ethernet port, since then no problems.
- Disabling everything in Network Connections except for the Wi-fi adapter stopped the cracking right off.
- Disable nvidia geforce powerizer

Optimizing Windows for Audio – Ableton
- Update drivers
- Use large audio buffers
- Run->Msconfig->disable unnecessary start up programs
- If graphics problem, Torches utility of PC but: Run-> SystemPropertiesPerformance ->Visual Effects tab->Adjust for best performance
- Turn off internet disable Anti-Virus
- disable Bluetooth
- Power options: Control Panel -> System and Security -> Power Options-> High Performance
- Control Panel ->System and Security ->System -> Device Manager -> Right Click each USB Root Hub->Choose Properties -> Power Management-> Make sure "Allow the computer to turn off this device to save power " is unticked.
- Generally not recommended as it makes PC run hot and fan to spool up, but if cpu is bottleneck: Power Options -> Change Plan Setting -> Change Advanced Plan Setting -> Processor Power Management-> Set Minimum Processor State to 100%.

https://forum.watmm.com/topic/89732-...g-audio-on-pc/
- update bios
- update foobar
- turn off wifi and antivirus
- increase asio/wasapi process priority in foobar
- disable system sounds
- Try Wasapi event

https://www.cantabilesoftware.com/glitchfree/
- More drastic changes that will affect PC operation but may fix issue

Other
- Start > Settings > Control Panel > System > Advanced > Performance Settings > Advanced Tab > Adjust for best performance of Background Services
- Paul McGowan (PS Audio): connect the computer to the Dac through a USB hub, .. offers a degree of isolation between the computer and the DAC, though its not complete
- 3 prong ac brick for laptop may cause ground loops leading to issues. Replace with double insulated power brick

Other resources
https://support.audient.com/hc/en-us...ters-For-Audio
https://www.soundonsound.com/techniq...io-clicks-pops
https://www.soundonsound.com/techniq...udio-interface
https://support.native-instruments.c...dio-Processing
https://www.cambridgeaudio.com/en/te...nd-wasapi-asio
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Old 1st January 2018, 02:55 AM   #2
globalplayer is offline globalplayer  Germany
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This will also help with (audio) latency.

Windows System Timer Tool | vvvv
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