<![CDATA[ChipMusic.org - Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/topic/8997/prosounding-the-dmg-built-in-jack-with-existing-gnd-or-from-pot/ Sun, 04 Nov 2012 09:00:53 +0000 PunBB <![CDATA[Re: Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/post/140496/#p140496 lastfuture says:

Thanks guys. "Different potentials" was the expression I was looking for. I'll do as you all say and leave the existing ground line connected.
How would I recognize if the ground is at the wrong potential? My gut tells me to look for a DC offset after recording, but I think the daughter board handles DC bias If I understand what this particular tutorial states:

You might be wondering why I chose this spot instead of directly to the jacks. And to answer this question, it's because there are output de-coupling caps on this board which will assure no dc-coupling issues with other gear.

]]> Sun, 04 Nov 2012 09:00:53 +0000 https://chipmusic.org/forums/post/140496/#p140496 <![CDATA[Re: Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/post/140475/#p140475 thursdaycustoms says:

What ASM said but simpler. Just don;t cut the ground wire and you'll be good. No need to solder a new ground.

]]> Sat, 03 Nov 2012 23:56:13 +0000 https://chipmusic.org/forums/post/140475/#p140475 <![CDATA[Re: Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/post/140473/#p140473 Apeshit says:

The question isn't whether ground is present or not in the circuit, but if there's an advantage to using the potentiometer's ground.

You may be aware that ground connections in circuits aren't always universal. "Ground" lines can have have different functions and should remain independent (i.e. analog ground/digital ground). But that isn't the case here. In theory, you may have better results with the potentiometer's ground, as the ground points among the board are at slightly different potentials. With that said, I doubt you'll notice any difference between the two.

]]> Sat, 03 Nov 2012 23:52:11 +0000 https://chipmusic.org/forums/post/140473/#p140473 <![CDATA[Re: Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/post/140466/#p140466 wedanced says:

lets clarify first by saying that no ground is needed. it should already be. unless you cut the ground wire.

]]> Sat, 03 Nov 2012 23:09:42 +0000 https://chipmusic.org/forums/post/140466/#p140466 <![CDATA[Re: Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/post/140313/#p140313 Alley Beach says:

it shouldnt matter, and if you notice there's static or feedback, then use the gnd from the pot. no biggie smile

]]> Fri, 02 Nov 2012 17:29:31 +0000 https://chipmusic.org/forums/post/140313/#p140313 <![CDATA[Prosounding the DMG built in jack with existing gnd or from pot?]]> https://chipmusic.org/forums/post/140311/#p140311 lastfuture says:

Hey,

I want to prosound the existing jack in my DMG but I'm not sure where to take GND from. I want to wire pre-pot L and R to the solder points on the audio daughter board where the 4-wire cable leads, cutting that cable's L and R wires in the process. There is already a GND wire leading to the daughter board. In my logic that should be fine since all GND is ideally the same. I have seen some tutorials however, cutting that existing GND wire from the daughter board and rewiring the GND pin from the volume pot there.

Is that really necessary? Is it different for pre- vs post-pot? Is there a difference? Or do the people instructing me to re-wire GND to the existing jack work off other tutorials for a separate jack and didn't think far enough?

Thanks for any clarifying answers smile

]]> Fri, 02 Nov 2012 17:05:58 +0000 https://chipmusic.org/forums/post/140311/#p140311