I've been getting many hits on the blog with search terms like "guitar and laptop" so I figured I'd take a few minutes and give the lowdown on my laptop guitar rig... this post will only be of interest to a subsection of guitar & computer geeks. If that ain't you, then read no further my friend.
Several years ago, I sold my racks of guitar effects & processors, convinced that it was redundant (and heavy) to use all of this dedicated hardware to perform functions that my laptop oughtta be able to handle by itself. I've since learned that this is not entirely true, although improving steadily as technology (and market demand for these gadgets) progresses.
I sold my tube pre-amp (an ADA MP-1) and my Rocktron Hush IIcx (guitar noise reduction). I still regret it to this day. I bought them both used, and sold them several years later for what I paid... they retained all their value, and sounded great. Oh well. I've since picked up a tube preamp, and a new guitar (with a humbucker, so I can avoid using my noisy single coil pickups if necessary).
So that's the first lesson... get the guitar signal into the computer using actual tubes. The amp and cabinet simulators are impressive, but still don't cut it (in my opinion). I use Amplitube, and Guitar Rig, but they both sound better when there's a tube in the signal chain before they get any audio. Here's the geeky goodness from the start of my signal chain to the finish:
1. Guitar
I have a heavily customized strat-style guitar. It has three Van Zandt "rock model" single coil pickups. They sound beautiful, but my guitar is very noisy. It doesn't play well with theater lights and clubs that don't have properly grounded outlets. I don't know if that's the pickups or my guitar - it could be that the guitar is not properly insulated and a good guitar tech could make it nice and quiet, but I haven't spent the money to find out. I've also got a custom neck, made by Warmoth. It's the biggest thing they could make for me that would still fit on a strat. I have Gotoh tuners. Recently, I bought a Les Paul "BFG" that has a humbucker and a single coil pickup. The humbucker solves my noise problem.
1b. Distortion pedal
When I'm not too lazy to bring it with me to gigs, I use a Buda tube overdrive pedal. It has two actual tubes in it and it sounds delicious.
2. Preamp
The output of the guitar heads to a PreSonus BlueTube preamp to get some real tube color before I send it into the computer. This is a nice, versatile, piece of gear. I got mine used, and I'm very happy with it. When I'm not using my laptop rig, I use this preamp & my Roland keyboard amp. This thing actually gives me a decent guitar tone through a keyboard amp.
3. Audio Interface
I'm using a PreSonus FirePod to get audio in and out of my laptop. It took me a few weeks to get it working nicely with Windows XP, but now that I have it set up, I'm very happy with it. It sounds nice. I've used it for recording in many different contexts, and it always does the trick. I picked mine up used (thanks Graham!).
When I first set up my laptop rig, I was using an M-Audio MobilPre interface. That thing is a piece of junk. I don't recommend it. The preamps do, in fact boost incoming signals. They do not, however, sound particularly good.
4. Laptop
I have a Sony Vaio with a Pentium 4. I will not buy another Sony laptop. It had a problem with overheating, which caused the CPU to slow down, which caused glitchy audio. Blowing the vents with canned air fixed the problem (for now). I also get some nice noisy interference, even when things are grounded properly. I've tried my audio interface on an old iBook, and there's NO NOISE. So I'm pretty sure the problem is inside the Sony.
5. Software
Once the guitar gets into the laptop, I'm using a variety of things. Mostly, I'm using Audiomulch. This is fabulous software (and cheap!). There's a large, active user community, and it keeps improving. It does lots of things that I don't use, but it makes a great environment for patching together contraptions for signal processing. It hosts VST's, so I can use lots of third-party processing contraptions, and it's very easy to manage signal routing and mixing. In some ways, it's like Max/MSP for guitarists (i.e. idiots). You can't build your own gadgets, but most guitar gizmos have been duplicated as free VST's. Almost all of the VST plugins that I use are available for free. The exceptions being Guitar Rig and Amplitube. Audiomulch is great for real-time processing, and I've been performing with it for several years. It's reliable. Can't say the same for all of those free VST's, so you need to keep an eye out for sloppily coded plugins that can make things unstable.
6. Control Surfaces
Now that all my processing is happening "in the box" I need some knobs and buttons so I can actually perform live and control this stuff. I use two: one UC-33, so I have knobs and faders, and one ART X-15 Ultrafoot. I picked it up used, very cheap, and it seems to be durable. One drawback is that the paint job is so horrifyingly ugly. I solved this with black paint and a paintbrush. I also don't like to have manufacturer's logos visible on stage, so I was happy to paint over that junk anyway. Audiomulch makes it so easy to map MIDI controllers to the software processors, even a guitarist can do it. With these two control surfaces, I have all the knobs, faders, and footswitches I could want, and set up is a piece of cake.
7. Outboard gear
When my laptop was overheating, I didn't trust it to do looping. So I put a Lexicon JamMan in my rack with the FirePod. Since the FirePod has 8 ins and outs, it was very simple within Audiomulch to make an aux send to feed the JamMan, and an aux return to bring it back into the laptop. Now that I have the laptop heat issue resolved, I still use the JamMan just to take that function off my CPU, and leave processor power for other stuff.
8. Amplifier
So, now the laptop has done it's magic and it's time to bring audio out into the real world... I use a pair of Roland KC-150 keyboard amps as a makeshift stereo PA. They are fairly small and lightweight, and versatile. They are transparent sounding, so there's no additional amp color added at this point. I also bought two long (50 foot) cables to go from balanced TRS 1/4" (the output of the FirePod) to XLR, so I can patch into a house PA when I'm playing in places with good sound systems -- and keep a balanced connection.
So I think that's it... that's my laptop guitar rig in a nutshell.