Hello,

Yes this is probably too little-too late, but maybe someone else can
benefit from it.

I'm not an expert at this and neither a Dev or Programmer, but this is what I 
did to correct my situation here with the audio via HDMI to my TV.
Below I used leafpad for my editor, pick your own poison...
----------------------------
First was default.pa

sudo leafpad /etc/pulse/default.pa

If you are using line numbers it is roughly line 53:

Original line...  
load-module module-udev-detect
Added to the end of this line was tsched=0  
Now...
load-module module-udev-detect tsched=0

So after the first fail which has worked for others, I changed the sample rate 
which apparently was too low for my Visio TV. 
Next was daemon.conf:

sudo leafpad /etc/pulse/daemon.conf

Roughly lines 81 and 82:

Original lines...
default-sample-rate = 41000
alternate-sample-rate = 48000

Changed to...
default-sample-rate = 48000
alternate-sample-rate = 96000

The sample rate change was the charm that worked for my hardware situation.
No more distortion and chopping/clipping sounds during standard vocal or 
incidental music while watching recordings or live streams.

Cheers
G

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https://bugs.launchpad.net/bugs/1340076

Title:
  HDMI audio is severely distorted.

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