#1
Hey guys,
For those who are familiar with wiring and soldiering I need to know how to splice a USB cable with a Guitar Lead.
Like This : http://www.p-buy.com/index.php?route=product/product&product_id=7585&currency=AUD

I know how to cut the leads open and reveal the copper wires and all that, I just need to know what connects to what haha. Any diagrams even if made on like MS paint would be awesome.

And please don't comment "Why don't you just buy one" or "USB guitar leads suck".

Thanks
#2
How is that possible? They must be using a completely different guitar lead cable
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#3
Quote by Kensai
How is that possible? They must be using a completely different guitar lead cable


Do you know much about wiring?
#4
Not really.
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#5
There is some sort of analogue to digital convertor in the end of hence why the usb part is so chunky. A usb port will only recognise binary so just soldering them together wont work.
#6
Quote by suicidalllama
There is some sort of analogue to digital convertor in the end of hence why the usb part is so chunky. A usb port will only recognise binary so just soldering them together wont work.


What have they done to create a USB Guitar Lead
#7
Quote by Grimwade
Hey guys,
For those who are familiar with wiring and soldiering I need to know how to splice a USB cable with a Guitar Lead.
Like This : http://www.p-buy.com/index.php?route=product/product&product_id=7585&currency=AUD

I know how to cut the leads open and reveal the copper wires and all that, I just need to know what connects to what haha. Any diagrams even if made on like MS paint would be awesome.

And please don't comment "Why don't you just buy one" or "USB guitar leads suck".

Thanks




That wont work.

It will have no A/D conversion, Just buy the lead or a soundcard with jack inputs.
Last edited by smokeysteve22 at Oct 8, 2011,
#8
Your guitar jack has 2 leads, one for the "channel" and one for ground.
On the USB you should have 4 leads, 1:Voltage supply; 2ata-In; 3ata-out; 4:Ground.
In my opinion you should use the data-in wire for the the channel and the ground together, though im not sure.
A multimeter should help you identify the correct wire for the USB


Search more "usb pinout" and check for the results

Quote by suicidalllama
There is some sort of analogue to digital convertor in the end of hence why the usb part is so chunky. A usb port will only recognise binary so just soldering them together wont work.

This guy might be right...
Last edited by szekelymihai at Oct 8, 2011,
#9
Quote by szekelymihai
Your guitar jack has 2 leads, one for the "channel" and one for ground.
On the USB you should have 4 leads, 1:Voltage supply; 2ata-In; 3ata-out; 4:Ground.
In my opinion you should use the data-in wire for the the channel and the ground together, though im not sure.
A multimeter should help you identify the correct wire for the USB

. Search more "usb pinout" and check for the results


Wow thanks. Also what is a multimeter.
#10


This is a basic diagram.

Analog signals need to be 'sampled and quantized' into a digital data for that cable to work.



Last edited by smokeysteve22 at Oct 8, 2011,
#11
edit: ^that

Quote by Grimwade
Wow thanks. Also what is a multimeter.

erm as stated before, this won't work. you need A/D convertor (also known as sound card) for this. You can't just plug analog instrument into digital USB (w/o converter). The thing you linked in the beginning has an A/D convertor inside of it. It's practically a external sound card, it's just so small that it fits into the connector (that's why it looks like a plain USB cable, but it isn't).

also multimeter: http://lmgtfy.com/?q=multimeter

To understand better why this simply won't work if you just solder it together you can check for example http://www.wisegeek.com/what-is-the-difference-between-analog-and-digital.htm this link (or http://lmgtfy.com/?q=analog+%26+digital+difference )
#12
Quote by KorYi
edit: ^that


erm as stated before, this won't work. you need A/D convertor (also known as sound card) for this. You can't just plug analog instrument into digital USB (w/o converter). The thing you linked in the beginning has an A/D convertor inside of it. It's practically a external sound card, it's just so small that it fits into the connector (that's why it looks like a plain USB cable, but it isn't).

also multimeter: http://lmgtfy.com/?q=multimeter

To understand better why this simply won't work if you just solder it together you can check for example http://www.wisegeek.com/what-is-the-difference-between-analog-and-digital.htm this link (or http://lmgtfy.com/?q=analog+%26+digital+difference )


Okay thanks
#13
do u have a usb amp?
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Tell me what nation on this earth, was not born of tragedy-Primordial
#15
Quote by Grimwade
Wow thanks. Also what is a multimeter.


Wow, you want to do some intricate wiring and soldering, yet you don't know what a multimeter is? Maybe you should just buy the pre-made cord and hope for the best.

Your major obstacle: guitar is an ANALOG signal. Computer is DIGITAL.

To overcome this: you need to be able to convert A/D.

I doubt you have the necessary skills to do this successfully, maybe I'm wrong.

To fix all: just buy the pre-made cord and be done with it. It's only like $25 or so.

I honestly don't understand how that cable is supposed to work either. It get's powered up via the USB connection right, but the guitar signal is also a power source. The pups generate their own voltage and current flow via inductance. And it ain't much either. How the two get sorted so that the pure signal from the guitar can get into the PC is not at all clear to me without seeing a schematic of all the necessary wiring. My only conclusion is that there's a chip in the USB end of the pre-made cords which is handling the conversion from Analog to Digital. Meaning, without it, you can't just solder the two ends of a couple of old cords together that you have laying around and stripped down. It won't work at the least, and could potentially fry something inside your computer at worst.
#16
Quote by LeftyDave
Wow, you want to do some intricate wiring and soldering, yet you don't know what a multimeter is? Maybe you should just buy the pre-made cord and hope for the best.

Your major obstacle: guitar is an ANALOG signal. Computer is DIGITAL.

To overcome this: you need to be able to convert A/D.

I doubt you have the necessary skills to do this successfully, maybe I'm wrong.

To fix all: just buy the pre-made cord and be done with it. It's only like $25 or so.

I honestly don't understand how that cable is supposed to work either. It get's powered up via the USB connection right, but the guitar signal is also a power source. The pups generate their own voltage and current flow via inductance. And it ain't much either. How the two get sorted so that the pure signal from the guitar can get into the PC is not at all clear to me without seeing a schematic of all the necessary wiring. My only conclusion is that there's a chip in the USB end of the pre-made cords which is handling the conversion from Analog to Digital. Meaning, without it, you can't just solder the two ends of a couple of old cords together that you have laying around and stripped down. It won't work at the least, and could potentially fry something inside your computer at worst.


Yeah, that's about it. TS, unless you're going the Epi Ultra III route and putting an A/D converter INSIDE your guitar, it will end up costing you less in the long run to buy the A/D cable.
#18
You won't be able to connect one directly like that, you need an ADC in between. Just buy a lead, they're not expensive enough to go to the hassle of building yourself.
You're using UG classic, congratulations.
You should be using UG classic.




E-Married to Guitar0Player

http://the llama forum because its gone forever which sucks and I hate it.
#19
Quote by LeftyDave
Wow, you want to do some intricate wiring and soldering, yet you don't know what a multimeter is? Maybe you should just buy the pre-made cord and hope for the best.

Your major obstacle: guitar is an ANALOG signal. Computer is DIGITAL.

To overcome this: you need to be able to convert A/D.

I doubt you have the necessary skills to do this successfully, maybe I'm wrong.

To fix all: just buy the pre-made cord and be done with it. It's only like $25 or so.

I honestly don't understand how that cable is supposed to work either. It get's powered up via the USB connection right, but the guitar signal is also a power source. The pups generate their own voltage and current flow via inductance. And it ain't much either. How the two get sorted so that the pure signal from the guitar can get into the PC is not at all clear to me without seeing a schematic of all the necessary wiring. My only conclusion is that there's a chip in the USB end of the pre-made cords which is handling the conversion from Analog to Digital. Meaning, without it, you can't just solder the two ends of a couple of old cords together that you have laying around and stripped down. It won't work at the least, and could potentially fry something inside your computer at worst.

I work with wiring at my job so if I had the schematics I could most likely do it, but yeah like you said I'm gunna need that A/D chip. So it's probably not worth the hassle.
#20
Go full-out and mod the guitar. Put one of these in it, its basically an A/D chip inside the guitar as an output:
http://www.epiphone.com/U3/

LIFE-O-DIT:

I actually found a project making a USB Guitar

http://machrone.net/usbguitar/
Last edited by L2112Lif at Oct 8, 2011,