Smartsdr for iPad frequently has audio fall outs

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Smartsdr for iPad has audio fade out issue
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James Madden

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Posted 6 months ago

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Ria - N2RJ, Elmer

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A lot of factors could be at play:

Older iPads don't handle it all that well. Consider one of the new iPads or iPad pro

Wifi varies. Try to get 802.11ac with a good signal. Marginal wifi won't cut it. 802.11n will work but if it's weak it won't be reliable.

If you're using SmartLink, consider what router you are using. Some of them increase bufferbloat which can use problems with streaming. Also if you're on a cellular connection it may not work well if you're on a congested cell site or have weak signal.

RIa
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Phil Stephenson

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I'm using an iPad Air 2, and the IOS SmartSDR app performs as expected except when using the iPad 's audio. The iPad audio is intermittent. If I choose any other audio option the audio performs perfectly.

I have plenty of WIFI bandwidth fed by ATT fiber 1000 gb.so I just don't think that bandwidth latency is at issue. No other apps are running and the only resource constraint I could imagine would be the processor but I would think that the heavy lifting would be for the UI logic and not the audio, Is there a configuration parameter I should be looking at? 

TNX,
PS
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Kevin - K4KWB

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Mine had a setting in the router, under the wireless side that caused mine to act that way.
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Charlie Rubenstein KB8CR

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Do you remember what that setting was? 
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Kevin - K4KWB

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I will look when I get home.
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Kevin - K4KWB

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From what i can tell is that i turned the wireless from Mixed mode to G (2.4) and A (5)
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Charlie Rubenstein KB8CR

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Thanks, I tried, but no change. It's better....but still cuts in and out on AF. I tried slowing the waterfall down (I thought selecting "low bandwidth mode" would do that, but it doesn't) and it helped some too.

Thanks again,

Charlie
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Ted VE3TRQ

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Are you in an area where there is any WiFi congestion? And are you using 2.4G or 5G WiFi?

2.4G is especially bad if there is contention of any kind. 5G handles it much better, although signal levels may be lower at distance. Might be an idea to do an RF survey in your WiFi frequencies.
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Phil Stephenson

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I'm three feet from the access point and I tune the 2.4Ghz and 5.0Ghz channels for an optimal reception based on other close access points but at this range, it's not an issue. I am connecting to the 5Ghz radio. I suspect bandwidth would be an issue if I were remote and on a lower bandwidth WIFI connection. I just find it confusing that the app behaves well in all other respects, the panadaptor and waterfall are both smooth and behaving as expected and it tunes well. but the iPad audio is the only issue. I see recommendations to switch to iPad Pro but the app's developer hadn't listed any minimum resource requirements so I still am not sure what minimum memory and processor resources might be required for complete operation of the app. I do understand why bandwidth would be a huge consideration but I really think a lack of bandwidth would more likely manifest itself as overall poor performance and not just audio. I am now concerned about operating remotely in situations where bandwidth is not optimal. 

Thanks for your response - BTW, that's a really cute boy in your avatar photo :)
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Charlie Rubenstein KB8CR

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I'm getting similar results in the same room as my router. (iPhone X) Interestingly, when out in public on LTE, it works great.....but that's not great for the data plan. 
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Manuel Maseda

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I had a similar issue. Turned out it was the Wi-Fi link between my iPad and my wireless router. The problem would come and go. I changed out and relocated the router but I would still occasionally get audio dropouts. I finally just hooked my iPad directly to my router using an Ethernet to Lightning adapter. Performance is significantly better and never had a single dropout.