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Old 26th January 2009, 03:21 PM   #1
zobsky is offline zobsky  India
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Default What do I need to run a signal from guitar into a Windows PC Line In

I'd like to play with software effect modeling.

As such, do I need to boost the signal from the guitar pickup before it hits the line-in of my soundblaster audigy 2 sound card? If so, can someone suggest a circuit that does what I ned and nothing more / less. Or even a cheap/readily available device. ... Or can I plug it in via a 1/4" to 1/8" adapter.

I'm probably more proficient at building tube circuits , though SS is okay too.

Thanks.
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Old 26th January 2009, 05:41 PM   #2
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need to find out the signal level of guitars...if the signal level is high u need to use only a couple of resistors + a capacitor..if its low u may play with the software level controls
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Old 26th January 2009, 05:46 PM   #3
zobsky is offline zobsky  India
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Quote:
Originally posted by sivan_and
need to find out the signal level of guitars...if the signal level is high u need to use only a couple of resistors + a capacitor..if its low u may play with the software level controls

Impedance matching is also part of the puzzle.

In short, will a simple preamp stage + low impedance buffer be called for or can I simplify further

Thanks
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Old 26th January 2009, 07:45 PM   #4
mjf is offline mjf  Austria
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hello.
e-guitars usually need a high input impedance,e.g. 1megohm.
a small preamp with a fet can do that...........
Common Source FET buffer
greetings...............
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Old 27th January 2009, 03:09 PM   #5
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In case you haven't noticed, just the previous topic: FET based Acoustic preamp help describes such a preamp. It is designed from an acoustic guitar and a piezo transducer, but it will work correctly with electric guitar.

Mark
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Old 27th January 2009, 03:19 PM   #6
zobsky is offline zobsky  India
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thanks all
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Old 4th February 2009, 03:55 PM   #7
KP11520 is offline KP11520  United States
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Hi,

Rather than build something that will match impedance and add gain, look at a USB or Firewire "Audio Interface".

This is the best way to bring in audio files into software recording and effects packages! They have input(s) for instruments and mics and usually have preamps to add gain and they take care of the impedance problems. They start at $50 USD up to the sky depending on how many channels you want to record on simultaneously and the quality of the ADC and Preamp(s). When you mic an amplifier with an electric guitar, you also get the room ambiance and it sounds more real, so try that with a good mic too.

You will get significantly better results this way, rather than through your soundcard.

Also look at the Line 6 Pods for the Interface. They also have tons of software for modeling.

Good luck!

Regards///Keith
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Old 4th February 2009, 04:17 PM   #8
HK26147 is offline HK26147  United States
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I'm with Keith; In that for not much money, you can get it done, vs fabricating something.
Including:
A D/I box and a mini mixer into the PC soundcard line level input.
Some side benefits: You can mix in other things and do some board EQ etc.
A Behringer X V-AMP Guitar Effects Processor would also do it fairly cheaply, with some added features.
( Used sound equipment is very cheap right now )
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Old 4th February 2009, 04:34 PM   #9
cbdb is offline cbdb  Canada
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Agree with the last 2 posts. Buy a usb audio I/O . There fairly cheap and alot of them include recording software.
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Old 4th February 2009, 04:35 PM   #10
cbdb is offline cbdb  Canada
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Just make sure it has an instrument input.
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