Even forced enabled jitter doesn't make asterisk to ignore late arrived 
packets. 
During my tests jb was always enabled (forced).
I made also tests without delay, only with drops - quality of Digium Opus not 
acceptable for voice conversation anyway.
The fact is open source opus handles better dropped packets.
You can't disagree with quality after all,
I can send you recorded samples, you can compare.

Yury


> On 3 Apr 2017, at 21:22, Kevin Harwell <kharw...@digium.com 
> <mailto:kharw...@digium.com>> wrote:
> 
> 
> 
> On Mon, Apr 3, 2017 at 1:28 PM, Yury Tsaregorodtsev <aero.1...@icloud.com 
> <mailto:aero.1...@icloud.com>> wrote:
> <snip> 
> MOS on calls using open source opus higher almost twice.
> Subjective opinion regarding audio quality: using open source codec quality 
> almost same as in example on http://opus-codec.org/examples/ 
> <http://opus-codec.org/examples/> with 30% loss and FEC, acceptable for ears, 
> but
> using digium opus quality is not acceptable, a lot of spikes, interruptions.
> 
> I also double checked the fact before applying ASTERISK-25629 patch asterisk 
> don't drop lately arrived RTP.
> 
> Dropped packets and late arriving packets are two separate issue and are 
> handled as such in Asterisk. The Digium Opus codec can handle dropped packets 
> by enabling FEC. If the problem is late arriving packets than applying a 
> jitter buffer to the audio stream exhibiting the problem should help 
> alleviate that.
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