Just thought that I would chime in here and say that this is definitely
a WiFi interference issue.  On my Dell XPS 9550 (bcm20703a1 bluetooth
chipset) I would get really bad choppy, de-synced audio sometimes.  I
finally figured out that whenever it was happening, I was connected to a
2.4 GHz WiFi network.  Connecting to a 5GHz WiFi network solved the
problem.

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1825639

Title:
  Pulseaudio skips some time in the audio buffer, causing a bluetooth
  delay and crackling/clicking sound. [Broadcom Corp. BCM20702 Bluetooth
  4.0]

Status in bluez package in Ubuntu:
  Invalid

Bug description:
  This is the same problem in
  https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294 and
  even though I have pulseaudio 12.2 (on Xubuntu 18.10), this problem
  persists (this T430 laptop has inbuilt Bluetooth).

  This makes listening to music or any audio over Bluetooth almost
  unbearable - while it is temporarily fixed by running `pactl suspend-
  sink 1 && pactl suspend-sink 0` it soon returns. I have even updated
  the BIOS but the problem persists.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: bluez 5.50-0ubuntu1
  ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
  Uname: Linux 4.18.0-11-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.10-0ubuntu13.2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sat Apr 20 13:10:59 2019
  InstallationDate: Installed on 2018-11-26 (144 days ago)
  InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 
(20181017.2)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: LENOVO 2349G4G
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-11-generic 
root=UUID=0e4c79dc-6836-4dcb-a54a-2c5842e1f6c1 ro quiet splash vt.handoff=1
  SourcePackage: bluez
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/19/2019
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G1ETB9WW (2.79 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2349G4G
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrG1ETB9WW(2.79):bd02/19/2019:svnLENOVO:pn2349G4G:pvrThinkPadT430:rvnLENOVO:rn2349G4G:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad T430
  dmi.product.name: 2349G4G
  dmi.product.sku: LENOVO_MT_2349
  dmi.product.version: ThinkPad T430
  dmi.sys.vendor: LENOVO
  hciconfig:
   hci0:        Type: Primary  Bus: USB
        BD Address: 24:FD:52:8C:5D:82  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING PSCAN 
        RX bytes:65823 acl:64 sco:0 events:9052 errors:0
        TX bytes:15368368 acl:17880 sco:0 commands:101 errors:0

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