I have a copy of native instruments guitar pro 5, and I've been told I need something like this audio interface in order to connect my guitar to my pc, but it's a bit more than I'm willing to spend.

How can I cheaply connect my guitar to my laptop so I can use the guitar-pro software, and still get a 'decent-ish' sound quality?



I've made this

enter image description here

For about $6 total. It's a simple impedance matcher that allows you to use your own sound card. If you feel like tinkering, you can't really get cheaper than this. The quality is okay-ish, and could certainly be improved by fiddling with the capacitance a bit and adding more shielding.

For anything more serious, I'm using a modelling unit; you can buy really nice ones with USB for under $50 nowadays, so it might be worth to save up a bit and go for something like that, used if need be; older models can still work nicely and you can get them for cheap if say a knob is broken, which won't impact your desired use at all.

Here's the forum thread I used as an inspiration.

I used slightly modified1 version of this:

enter image description here

Attribution for the design and picture goes to the DIYStompboxes forum users.

1: I used 2n3819 and added the additional 10kOhm at the end. I don't think it really matters, but I've put 100kOhm at the front (before the transistor, it varied from circuit to circuit). I've attached about 4" cable with male 3.5mm jack from one side, and the 1/4" jack socket at the other.

  • This looks perfect for what I need. Could you please provide a circuit diagram or quick explanation? Also, does this just connect to the microphone (audio-in) port of the PC? And would using this in series with a differential amplifier add any benefit?
    – Blue7
    Dec 19 '14 at 0:36
  • Final Question: If I am using the microphone port instead of the USB, will this still work with the guitar pro 5 software? Thanks.
    – Blue7
    Dec 19 '14 at 0:38
  • USB port can't transmit audio signals "directly". USB devices simply function as soundcards. I'll try to find the circuit diagram I used and send it to you. Dec 19 '14 at 8:23
  • @Blue7 However, could you clarify what you mean by "using Guitar Pro with the guitar"? Dec 19 '14 at 9:55
  • 1
    Ahhh, I meant Guitar Rig 5 Pro. Not Guitar Pro 5.
    – Blue7
    Dec 22 '14 at 13:35

Behringer UCG102 is one of the cheapest guitar interfaces for PC/MAC. It costs a little over £20 but not that much. However I'd advise against buying the cheapest interface. If you can't afford anything better at the moment, than I suggest to save some money and then buy the better interface. Otherwise after playing for couple of weeks it may turn out that the basic interface that you've bought is not enough anymore for what you want to do and you need to replace it.

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