VGA connector has sound? Where?
msrobots
Posts: 3,704
in Propeller 2
Just got a new monitor and it provides sound over VGA. How?
I was not aware that this is possible, did I miss some notice?
confused,
Mike
Comments
Hey it's not even April 1st yet in Oz. Or even NZ for that matter.
I know but monitor is just connected with VGA connector and has sound output
Just got it today and have not investigated.
Mike
What is sourcing it, a PC or something else?
Bluetooth speakers in the monitor ?
You didn't say what kind of sound. For example, if VSYNC is amplified, you'll get a noticeable buzz.
-Phil
What is make and model number?
Did you actually produce sound over vga?
I’d guess there’s a hdmi input on it for sound…
There are VGA cables that also include a 3.5mm audio jack circuit in the same cable, which exits from the back of each D15 connector? In between the two ends is a single round cable
If there's no separate jack then it might be doing audio over the I2C interface normally used for DDC somehow
Do you have a monitor make & model for us?
Good to see you in the P2 channels Phil. I can't wait to see what you will do for radio stuff with the new capabilities of the P2.
Thanks,
Doug
VGA doesn’t’ carry sound. Not in standard vga format
You may have a monitor that uses the spare pins on the vga connector at the the monitor to receive sound,. As tubular pointed out.
ASUS VA249HE 23.8" and just connected to outlet and standard VGA Cable to a HP Compaq. And do not see any speaker in the PC either.
I do have a bluetooth mouse, standard Keyboard with USB and nothing else connected.
But clearly have sound on Videos playing in Youtube.
My guess also is that the I2C used for DDC is used but if there is some newer standard to do so we should find out how.
Mike
Try unplugging the monitor from the computer. Do you still have sound?
-Phil
Oh Phil, you got it. I just did that and YES still sound. so it is the PC not the monitor, confusion solved.
It is a weird PC anyways, bought at a discount seller for $234 or something, Intel I5 and 16GB ram and has besides USB still a real serial port and additional PS2 mouse and Keyboard plugs.
And obviously a build in speaker, OH well.
They are sitting next to each other so I could not clearly locate where the sound came from
sorry guys for the stupid question
Mike
Lol Mike.
Like Roger said this is like a good April fools prank, only extended a bit before and after
It does make be wonder how one might do sound over those DDC pins
The P2, with its synchronous I/Os locked to the system clock and lack of individual PLLs, renders it less appropriate for RF stuff than the P1.
Anyway, RF apps are way on the back burner right now. I'm having too much fun with air-quality stuff.
-Phil
Why the DDC pins when you have those wonderful video lines at your fingertips? Hsync happens often enough that you could switch analog audio onto the color pins and have the monitor sample-and-hold it.
Welcome to the club, Mike
I am working in a spare office at a customer's facility. Getting a bit cold but I could hear the fan-heater kicking-in....but only for a second and then off again. That's a bit strange, it was fine yesterday and I haven't touched it
DOH!!! [Homer Simpson style]
I had somehow unplugged it and at the same time, installed a keep-bluetooth-alive app on my phone to keep my bluetooth speaker from shutting down. The app blasts white noise through the speaker every few minutes and it sounds exactly the same as the fan heater
Craig