Yes, that's how the UAC works when triggered from a non-admin account, and (most) installers cause the UAC to come up. If there's only one admin level account it defaults to that one, but I do have to enter the password. I treat it a bit like using "sudo" on a Linux/Unix machine--I don't like staying logged in as an admin account.

I get an Access Denied error on that link.

Since I already use AutoHotkey I used someone's example one-off AutoHotkey script to accomplish the Mute/Unmute, plus Play/Pause, Volume Up/Down, and Skip Forward/Back. I can provide the script and commands if anybody's interested. It can be used to simulate virtually any keyboard key, or even key sequences.

I think I've uncovered another bug. For some reason I'm seeing multiple entries in my command list on the website, even though my commands.json file doesn't have duplicates, and triggering one of the duplicated commands is problematic.

@Russ Not a problem. I wondered if it was something like that, but my attempts to fix it didn't involve recreating the Zap. It was easy to rebuild it from scratch, and I only have the one (so far). Thank you.

My only Zap has been failing for the past few weeks, with this error: "www.triggercmd.com returned (502) Bad Gateway and said nothing"

Any tips on fixing it?

@Nate-Hales You're going beyond what I'm doing with Alexa/TRIGGERcmd/home automation, so I don't know if I could help you much. I hope the tools I posted above can be useful, though.

@Nate-Hales

I just use a passive stereo mixer to allow me to hear my Echo Dot, my TV, my computer, etc. at once. Same concept, basically.

@Nate-Hales

Theoretically, yes, as long as you're willing to go with "canned" messages. Windows 10 (and 8, I'm assuming) has some support for text-to-speech, but it's not very accessible. Somewhere I came across a small vbs that can do short messages on the command line:

say.vbs

set s = CreateObject("SAPI.SpVoice")
s.Speak Wscript.Arguments(0), 3
s.WaitUntilDone(1000)

It's called this way: cscript say.vbs "hello world"

@Nate-Hales

You can't override Alexa's responses, unfortunately. The "voice" part of the configuration for TRIGGERcmd is for what you say to Alexa.

@Nate-Hales

SimKeys.ahk

; By SKAN,  http://goo.gl/JfMNpN,  CD:23/Aug/2014 | MD:24/Aug/2014

#Warn
#SingleInstance, Force

Args( CmdLine := "", Skip := 0 ) {
  Local pArgs := 0, nArgs := 0, A := []
  
  pArgs := DllCall( "Shell32\CommandLineToArgvW", "WStr",CmdLine, "PtrP",nArgs, "Ptr" ) 

  Loop % ( nArgs ) 
     If ( A_Index > Skip ) 
       A[ A_Index - Skip ] := StrGet( NumGet( ( A_Index - 1 ) * A_PtrSize + pArgs ), "UTF-16" )  

  Return A, A[0] := nArgs - Skip, DllCall( "LocalFree", "Ptr", pArgs)  
}

CmdLine := DllCall( "GetCommandLine", "Str" )
Skip    := ( A_IsCompiled ? 1 : 2 )
argv    := Args( CmdLine, Skip )

If ( argv[0] == 1 )
  Send % argv[1]
Else
  Msgbox, , Error, Must provide exactly one argument, 10

;Msgbox % "Count = " argv[0] "`n1=" argv[1] "`n2=" argv[2] "`n3=" argv[3] "`n4=" argv[4] "`n5=" argv[5]

SimKeys.vbs

Dim WshShell
Set WshShell = WScript.CreateObject("WScript.Shell")
WshShell.SendKeys WScript.Arguments(0)

Excerpt from commands.json

{"trigger":"Play", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Media_Play_Pause}", "ground":"foreground", "voice":"play"}, 
{"trigger":"Pause", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Media_Play_Pause}", "ground":"foreground", "voice":"pause"}, 
{"trigger":"Stop", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Media_Stop}", "ground":"foreground", "voice":"stop"}, 
{"trigger":"Previous", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Media_Prev}", "ground":"foreground", "voice":"previous"}, 
{"trigger":"Next", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Media_Next}", "ground":"foreground", "voice":"next"}, 
{"trigger":"Volume Up", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Volume_Up}", "ground":"foreground", "voice":"volume up"}, 
{"trigger":"Volume Down", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Volume_Down}", "ground":"foreground", "voice":"volume down"}, 
{"trigger":"Mute/Unmute", "command":"\"C:\\Program Files\\AutoHotkey\\AutoHotkeyU64\" C: YOUR DIRECTORY \\SimKeys.ahk {Volume_Mute}", "ground":"foreground", "voice":"mute"}, 

Replace "YOUR DIRECTORY" with the proper path to SimKeys.ahk and SimKeys.vbs (both need to be in the same location).

Edit: It appears SimKeys.vbs is not necessary. I don't remember why I have it--possibly because I was trying out an alternate method and forgot to move/remove it. I'm leaving it here just in case.

@Russ No problem. I'm happy to help, especially since this is such a cool skill. Thank you for your efforts.

@Russ No, I wasn't saying "run," but when I do it works.

@Russ Unfortunately I still get the "undefined" response. Also, duplicates still appear on me occasionally--when I notice it I use the rename trick to clear them, but didn't see that one.