Installation and optimism of “Audiophonics ES9028Q2M”

updated in 24 Dec, 2017


I would not mention much the willing of The ncessity to have a wireless PC-Hifi system. Tough had collected a quantity of CD and LP, I believe the digitization of music library would be indispensable during some special cases.

Though official site of Audiophonics indicates the capability to Volumio (A multi-platform music players), unfortunately, I have encountered much time in the past days and, honestly, got an upsetting experience when piecing together by Audiophonics and Volumio1.

Even, I make much satisfaction with the sound from DietPi, personally, more clear and pure voice, the efficient start time and the design of UI, finally, the stability by comparing to Volumio.

The article aims to provide a reference for serious philharmonicgeek, the who have limitation of expense but the intension of high fidelity “enough” quality.

The General Workflow

The Workflow of Signal Connection

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Setup Ikev2/IPsec VPN based on StrongSwan 5 (compatible with OpenVZ)

  • Updated in Sep 15, 2015
  • Update 2: to make configuration simplifier, please click here.


Since reasons of limitations and disadvantages of PPTP VPN (Low security standards, lower performance on unstable connections, etc.), an indispensable obligation to handle notorious network blockade fact is needed deeply. At this point, not only have configuration should be installed on server side, but also to ensure client be configured scrupulously as well. Following document is intended to give an introduction to users who extend to requirements in need, as a fraction of widely know vast [circumvention projects] or other similar censorship.

Configuration based on StrongSwan 5, the OpenSource IPsec-based VPN Solution.

Certainly, StrongSwan 5 would be available an extremely wide range of platform: Mac OS X, Windows, Linux, iOS, Android and Widows Phone could be good compatible.

All demonstration tested in Debian 7 and ubuntu 14.


firstly, input following:

cat /dev/net/tun

should response as

cat: /dev/net/tun: File descriptor in bad state

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