[colug-432] raspberrypi python audio playback

[Peter Stryjewski]

Rick,

It's another piece, but look up HDMI headless adapter on Amazon.
They are pretty cheap, they emulate a HDMI device.

I've used them for Macs when VNCing to the machine.  It allows full 
1080p display over VNC.  In some cases that will turn on additional 
graphics acceleration.

> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 11 Jun 2017 19:28:21 -0400
> From: Rick Hornsby <richardjhornsby at gmail.com>
> Subject: Re: [colug-432] raspberrypi python audio playback
> To: Central OH Linux User Group - 432xx <colug-432 at colug.net>
> Message-ID:
> <CAP--A0=Atx413+o+Qoj=PJn_5vpVoP+jsLh=1cYFOJw1rhQavg at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Thanks for the feedback and suggestions.
>
> After an Amazon misfire, I ordered a different ($30) HDMI convertor. Bad
> news  - to function, this device needs to sync with something on the HDMI
> OUT side like a TV or monitor. It won't send audio to the 3.5mm or SPDIF
> unless that happens first. After it syncs, you can unplug the HDMI 
> out, but
> that means leaving it plugged into a display all the time so that it
> initializes correctly on power up. That's no good.
>
> I ended up changing the script to use python3, and SimpleAudio (py3 
> only?)
> instead of pygame. It's missing a couple of features I wanted from pygame
> (audio fade), but I made it work anyways. Both SimpleAudio and pygame are
> inherently already threaded and support start/stop methods, so I didn't
> have to worry about that. SimpleAudio, however, seems to honor the amixer
> setting of using the 3.5mm jack.
>
> It's nearly time to figure out how to solder this thing to a permaproto
> board.
>
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