Monthly Archives: November 2014

How To Mic a Guitar Amp

When you hear a memorable guitar riff, you’re probably not thinking of how it was recorded…where the amp sat, was it on a carpeted floor, was the microphone two inches or ten inches away. But it’s these details that contribute to the sound you hear on the recording. So how do you capture the sound of an electric guitar?

First of all, you want to record the amp. While the electric guitar can certainly be recorded directly, there are times when there is simply no substitute for the sound of a real amplifier. Guitar amps have particular gain stages that facilitate the popular “crunch” guitar sound. While digital modeling and processing systems certainly have their place, they may not have the same level of realism as the sound from an amplifier. A small guitar amp can be just as effective for this application as a stack, because you don’t necessarily need to “crank” the volume. Instead, you want to increase the amp’s initial gain to achieve the desired amount of overdrive.

Typically, a guitar amp is close mic’ed to achieve the highest direct sound. Placing the microphone roughly 4 inches from the grill, aimed directly at the center of the loudspeaker will produce the most “edge” to your sound. If you move the mic further away, it takes the edge off the sound. It’ll be a bit mellower.

Now, if you’re going to put a microphone super close to an amp, it better be able to handle some high SPLs (sound pressure levels). It doesn’t necessarily have to be a dynamic mic – a condenser or two can do the job. A good instrument mic can perform well on a variety of instruments, including a guitar cabinet.

Distance from the source isn’t the only thing affecting the sound. By angling the microphone slightly off axis and towards the wall, you can add more “room sound.” Experimentation is a key factor in achieving the sound you are looking for. You might put one mic close to the cabinet and one several inches way. You’ll target the cabinet but you’ll also pick up the cabinet sound as it’s reflected in the room.Diagram of microphone placement

A ribbon mic might also give you the mix of guitar and room sound you’re looking for. The figure eight pattern picks up sound to the front and back of the mic without any creative placement. It’s what ribbon mics are made for.

Placement of the amp is another important factor. If the amplifier sits on a carpeted floor, you are more likely to reduce the amount of brightness in the sound. Similarly, elevating the amplifier off the floor may result in a loss of low-end. If you’re looking for a big reverberant tone, placing the amp and microphone in the bathroom is another popular technique. The hard tiles and other reflective surfaces can do wonders for a dull sound. In this case, move the microphone back a few feet from the loudspeaker and crank it up!

Recording audio is all about getting the sound you want. Garage band or singer/songwriter? Rock anthem or wedding ballad? “Enter the Sandman” or “Faithfully”? Determine your desired sound and then adjust your mic and amp placement until you get it. There’s no wrong answer!

A Group of Dedicated Educators

Media teacher

I was invited to present audio solutions for video to a group of high school and middle school educators this past week. The group, located in Los Angeles, CA, is a consortium comprised mostly of Los Angeles Unified School District media instructors. The group is called MELA (Media Educators of Los Angeles). My contact there is Antonio Manriquez. Antonio serves at the Executive Director, as well as Video Production teacher in the Hollywood High School New Media Academy.

Programs like the one at Hollywood High School are popping up in high schools all over the country, and I suspect the world. I have been meeting with more and more of the instructors of these classes, and some of the students. It is a dedicated and focused group of people working on supplying the world with the latest content, using the latest production techniques.

The thing that impresses me the most about these educators is their level of devotion to the art of content creation, and their commitment to their students. The particular group of educators I met with at the MELA meeting (about 30 of them) battled L.A. traffic, at the height of rush hour (which is world class jam packed) in the afternoon after teaching all day. They came from all over the L.A. basin, driving as much as 30 miles to attend. This is not a paid or required activity. They have taken it upon themselves to belong to this group to further their skills. They review the latest technologies, trends, and products. There is an open discussion about the challenges they are all facing in their classrooms.

In the new world of unlimited access to the public through IPTV, YouTube, and social media sharing, there is an unquenchable appetite for content. This translates directly into jobs and careers which the students can enter if they have the right skills. These young people will shape, and in some cases already are shaping, the new media
landscape. It’s really encouraging to see these teachers helping their students enter this field, giving them the tools they need to be successful.

We all know that information translates into knowledge. And knowledge turns into power. That means that these students have the power to shape their future through video production. At a very early age, they are stepping up to become the media leaders of our world.

I was proud to be invited to speak to this group. They were hungry for new information on products they can take back to their students, to help make the best videos they can. It was a great way to spend my evening. What I learned was that we as a society are in good hands. These students are our future. And to see such hard-working educators guiding their learning activities made me confident that we are going in the right direction.

Technology for the sake of itself is just noise. When you have a dedicated group of people using this technology to bring the world important messages, you have the recipe for a bright future.