Speaker strange acoustic noise

Discussion in 'Installation and Configuration of Parallels Desktop' started by RachelL1, Jan 23, 2017.

  1. RachelL1

    RachelL1 Member

    Messages:
    34
    Dear All,
    I work with Parallels 12 Pro and Windows 10 on my MacBook Pro, Speaker and sound on the new Mac are great, but when I activate the speakers on Parallels or move the volume, it makes a very strange acoustic noise from the speakers (only in Parallels), does someone know why or from where this can come from? (when I move the volume louder the noise also becomes louder)
    would appreciate your help this is quite unsetting
    thanks in advance
    Regards Rachel
     
    RachelL1, Jan 23, 2017
    #1
  2. Maria@Parallels

    Maria@Parallels Problem solver

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    8,115
    Maria@Parallels, Jan 25, 2017
    #2
  3. Maria@Parallels

    Maria@Parallels Problem solver

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    8,115
    Except for that, did you install any special drivers on the Windows side?
     
    Maria@Parallels, Jan 25, 2017
    #3
  4. RachelL1

    RachelL1 Member

    Messages:
    34
    Dear Maria,
    thank you for your reply, yesterday I have reinstalled the Parallels Tools and played again on the windows side with the Volume or the speakers, then it was fine, but today I have opened AutoCad and now again for a short time this swoosh (difficult to explain)
    for your second question, no I have not installed any drivers.
    any other idea??
     
    RachelL1, Jan 26, 2017
    #4
  5. Maria@Parallels

    Maria@Parallels Problem solver

    Messages:
    8,115
    Thanks a lot or your reply. Does the issue reoccur with AutoCad only?
     
    Maria@Parallels, Jan 26, 2017
    #5
  6. RachelL1

    RachelL1 Member

    Messages:
    34
    Dear Maria,
    Not only with AutoCad I had this also when I added a external drive to move datas. I still try to find out some regularity but since yesterday it not happen any more. difficult to tell, in the parallels properties I have the speakers/sound the output and input as standard is this correct?
     
    RachelL1, Jan 27, 2017
    #6
  7. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

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    3,112
    Hi RacheL1, yes, you are correct. Switch driver mode to WaveCyclic.
    Note: Ensure that snapshot is created (Virtual Machine > Take a snapshot) before the below steps are followed.
    Try one option at a time and check if it resolves the issues:
    Use Boot flag "devices.audio.clock=1" (to check guest time logic):
    - Start Parallels Desktop without starting the virtual machine
    - Go to virtual machine configuration http://kb.parallels.com/en/117287 > Hardware > Boot order
    - In the field Bootflag please type in: "devices.audio.clock=1" (without quotes)
    - Close the configuration window and start the virtual machine
    Change the Windows OS registry:
    - Start the virtual machine
    - Go to Start and type in "regedit"
    - Find the following branch:
    Switch driver mode to WaveCyclic:
    HKLM\SYSTEM\CurrentControlSet\Control\Class{4D36E96C-E325-11CE-BFC1-08002BE10318}\\OverrideCaps\WAVERTMODE = 0_
    Switch driver mode to low-precision position:
    HKLM\SYSTEM\CurrentControlSet\Control\Class{4D36E96C-E325-11CE-BFC1-08002BE10318}\\OverrideCaps\IGNOREPICB = 0x02_
     
    PaulChristopher@Parallels, Jan 27, 2017
    #7
  8. RachelL1

    RachelL1 Member

    Messages:
    34
    Dear Paul Chris,
    Thank you very much for your reply to my question, I need you're help again here, I have made the first step as explained above (notice in Bootflag), this have helped already a lot but since yesterday I noticed that the problem is not 100% solved as it happen again, so I tried to follow the steps on the registry, but here I have a problem as I cannot find HKLM link, I have uploaded a print screen of the registry, I have also tried to search in the registry and also search in the explorer for this file but no luck, I guess something I'm doing wrong maybe you can help me again? thanks in advance, Kind Regards Rachel
     

    Attached Files:

    RachelL1, Mar 5, 2017
    #8
  9. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

    Messages:
    3,112
    HKLM stands for HKEY LOCAL MACHINE. You can find out this option under the registry settings.
     
    PaulChristopher@Parallels, Mar 5, 2017
    #9
  10. RachelL1

    RachelL1 Member

    Messages:
    34
    Dear Paul Chris,
    sorry about this, it is absolutely not my profession ... but I could have searched better.
    Actually I could change the first one WAVERTMODE from 1 to 0 but the second one IGNOREPICB I can't find under Override Caps I have added another print screen to show what I see
    Thanks in advance
    Kind Regards
    Rachel
     

    Attached Files:

    RachelL1, Mar 8, 2017
    #10
  11. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

    Messages:
    3,112
    That's okay. Now, please reinstall Parallels Tools and let us know how it works.
     
    PaulChristopher@Parallels, Mar 9, 2017
    #11
  12. RachelL1

    RachelL1 Member

    Messages:
    34
    OK done, thank you, I will test it and come back with feedback, thanks for your help!!
    Kind Regards
    Rachel
     
    RachelL1, Mar 9, 2017
    #12
  13. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

    Messages:
    3,112
    You are welcome! Let us know once you have tried it, we are here to help.
     
    PaulChristopher@Parallels, Mar 9, 2017
    #13

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