rederikus wrote: 
> PCP 3.02 works really well.  I have upgraded all four of my RPi players
> to 3.02.  Well worth it.  Thanks guys.
> 
> There is something I would love to see on PCP.  It is this.
> 
> Enable three RPi GPIO pins to give these functions:
> 1). Powered on
> 2). Switched on
> 3). Playing music
> 
> The first is easy and already exists. Pins 1 & 2 give +5V when the RPi
> is powered up.  I know #2 can be done because my HiFiBerry has a little
> green LED that switches on (+3.1V) when the LMS On button is pressed and
> it goes out again when I switch Off.  This function works from Port 900
> on the web interface from Windows 10 and from Squeeze Ctrl.   #3 is
> what's missing.  If this could be provided then simply pressing Play
> either in Squeeze Ctrl or in Windows could be mmade to click a relay and
> power up my amplifier.  Equally pausing the music could be arranged,
> after a suitable delay (3 -5 minutes) to drop the relay and power off
> the amps.
> 
> I have already implemented this in hardware
> http://www.schematics.com/site_media/media/project/previews/10108-audio-controlled_switch_2x.png
> and it works tolerably well.  The amp has an annoying tendency to switch
> off in quiet passages of music when playing at low levels.  
> 
> If this could be implemented in PCP, I think it would be really useful.
> 
> Thanks.

hi rederikus,

Here is a thread that does something similar to #3.

http://www.pinkfishmedia.net/forum/showthread.php?t=165465

regards
Greg


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