[App_rpt-users] Audio Delay During Duplex SimpleUSB

[Mike]

Yes, I would just call it a annoyance.

But sometimes it breaks my train of thought in a conversation. 
especially when it gets near 2 seconds. That's what is aggravating for 
me and all the users are quick to say something about it.
It's not hurting anything.

Let me know what you find. I may look at it closer over the holiday & 
weekend.

...mike/kb8jnm

On 11/19/2018 7:26 AM, Ed Wilhelm wrote:
> When I stop and think about it, have never heard myself while using iaxrpt.
> 
> It doesn't really bother me, but is seems to bug some people a lot, so 
> was looking for a fix.
> 
> I'll give the USB Radio a try. Got to admit it may  be awhile. Too lazy 
> to drag service monitor to repeater and re-diddle levels LOL.
> 
> Ed W8VT
> 
> On 11/18/2018 9:13 PM, Mike wrote:
>>
>> Well,
>>
>> I never hear myself 'after I unkey' if using iaxrpt on a dahdi node. 
>> Including on a Pi3
>>
>> But using  one of the radio nodes (with a radio) that use simpleusb on 
>> the same server does create that effect.
>>
>> Perhaps it is not a proper observation for compare since a direct iax 
>> stream is not exactly the same handling/buffering.
>>
>> ...mike/kb8jnm
>>
>> On 11/18/2018 8:00 PM, Tim Sawyer wrote:
>>> Mike,
>>>
>>> The variable audio delay happens with RTCM's too.
>>>
>>> Are you running full duplex DAHDI to a device some how? I don't 
>>> understand how you know that this never happens with the DAHDI driver.
>>>
>>> On Sun, Nov 18, 2018 at 8:30 AM Mike <mm at midnighteng.com 
>>> <mailto:mm at midnighteng.com>> wrote:
>>>
>>>     Ed, ya know I have had the same issue and never had time to fully
>>>     investigate it. Was never a major issue for me, just a annoyance.
>>>
>>>     It seems to vary in it's delay and I was looking for other
>>>     processes in memory slowing it down and found nothing and always
>>>     has plenty of cpu and ram.
>>>
>>>     Nodes with dahdi driver are never a issue on the same server.
>>>
>>>     Could be some interference with cpu time-slice etc ?
>>>
>>>     But,
>>>
>>>     It seems to correspond to me when I did switch to simpleusb this
>>>     year so I would say try it with usbradio if you have the
>>>     additional headroom.
>>>
>>>     Perhaps I will switch back as well. It's worth noting and trying.
>>>
>>>     ...mike/kb8jnm
>>>
>>>     On 11/18/2018 11:11 AM, Ed Wilhelm wrote:
>>>>     Been running SimleUSB on my repeater for sometime. All works
>>>>     well except for the variable audio delay, sometimes will hear
>>>>     the end of my own transmission. Know this issue has been around
>>>>     for awile. Someone said try USBRadio, but would think that would
>>>>     use even more processing and agrevate the situation.
>>>>     This is running latest version of ASL on a Raspberry Pi2.
>>>>     Any input appreciated.
>>>>
>>>>     Ed W8VT
>>>>
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>>> -- 
>>> Tim WD6AWP
>>>
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