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Date: Thu, 16 Feb 2017 11:41:23 +0100
From: DK7FC <selberdenken@posteo.de>
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Subject: Re: LF: Raspberry Pi sound interface that works
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...they are available again, 
https://www.amazon.co.uk/gp/product/B01HBC8CJ0/ however that's in UK, i 
didn't find them in amazon.de so far. However i'm waiting for the device 
with 6 inputs anyway :-)

73, Stefan

PS: Jim, i don't think the module will have problems with the RPi3, it's 
just a question of power consumption for a portable or solar supplied 
system. My tree grabber is running on a RPi2B, i need to take care 
saving each mA, otherwise the availability will decrease, especially in 
December! An on-board WLAN may be comfortable for your application, 
crossing a distance of up to 10m. But for my tree, i need a WLAN stick 
with an SMA jack to connect a yagi. The distance is 3.5 km...

Am 16.02.2017 00:45, schrieb hvanesce@comcast.net:
> Paul,
>
> Thanks for posting your findings on this topic.
>
> Plenty of the Audio Injector boards on local Amazon so I bought four in hopes that your tests would prove favorable. Thanks for the favorable results!
>
> I haven’t worked with a Raspberry Pi before but have a new CanaKit RPi 3 and though I would use it with the Audio Injector module. Then I saw your message indicating disinclination toward RPi 3 power dissipation (from unused built-in Bluetooth and WiFi). I had guessed that the RPi would be used to enable a wireless connection between antenna and laptop/PC, which raises a question (if you have a moment): for a backyard-antenna-to-indoor-laptop application or for a portable field-test application, what type of interface would be used between an outdoor RPi 2 and an indoor laptop or portable-field-test laptop?  (or am I on the wrong track; should I be thinking of Audio Injector plus  RPi 2as an unattended datalogger rather than a real-time interface between VLF loop and laptop?)
>
> Thanks,
>
> Jim AA5BW
>
>
>
>
>
> -----Original Message-----
> From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Paul Nicholson
> Sent: Wednesday, February 15, 2017 5:02 PM
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: Raspberry Pi sound interface that works
>
>
> Another update to EbSynth, now at version 0.7a
>
>    http://abelian.org/ebnaut/ebsynth.shtml
>
> Now compensates properly for changing delay of the output buffer as the sample rate wanders.  A temperature change that previously produced a 30 degree output change now only affects the phase by about 0.3 degrees. The residual is a 2nd order effect proportional to the rate of change of sample rate.
>
> I've noticed a couple of sound card input overruns on the RPi when the CPUs are very busy.  0.7a assigns itself a real-time scheduling policy at high priority.  It remains to be seen if that fixes the overruns.
>
> --
> Paul Nicholson
> --
>
>
>