Tag: Dynamic Microphone

Make Your Creative Voice Heard With Technical Pro’s PM-21 Podcast Mixer Kit


The PM-21 comes with everything you need to get up and running, including a comprehensive, step-by-step guide that leads you all the way through to hosting your podcast on Podbean.com

This digital, social networking age in which we live has granted us the ability to communicate with each other through a broad variety of mediums. However, since nearly everyone has access to these mediums, now we’re faced with sifting through oceans of piffle to find worthwhile and/or intellectually stimulating content, especially on Twitter and Facebook. With Technical Pro’s PM-21, one faces the question “why not create your own?” Why not, indeed.

PM-21 Box

Now on sale at Sonic Electronix!

In this blogger’s opinion, one of the most thoroughly exciting things about being human, nay about being alive, is our boundless capacity to create. Unfortunately, it seems that many of us forget that due to a wide variety of reasons, but with this all-inclusive podcast mixer kit, you can rediscover your creative voice with greater ease than ever before. As stated in the picture caption above, Technical Pro’s PM-21 comes with a comprehensive, step-by-step guide that leads you from the installation of the software, to the connection and proper setup of all components, to the actual audio recording process and finally through to setting up a free podcast hosting account on Podbean.com

PM-21 Mixer

You'll find you won't need to compromise very much desk space at all with the PM-21's delightfully compact mixer.

If you’ll permit me to get a little “Technical,” I should mention here that this mixer has two gold-plated 1/4″ microphone inputs and two 1/8″ headphone outputs, making it an ideal solution for any talkshow podcast, or any podcast that might feature guests from time to time. The kit also includes a male-to-male 1/8″ cable and the mixer has a standard 1/8″ input, making it fantastically simple to connect in your iPod, iPad, iPhone or any other personal media device and add music to your podcast. You can even fine tune the bass and treble of each input to make your podcast as crisp and professional as possible.

Now, certainly there are countless ways to get yourself properly set up for podcasting. However, I dare say it would be quite difficult to find a collection of quality components like these at the price we’re offering right now. This kit spectacularly defies that negative old adage, “you get what you pay for,” also. If you have something important to say, the Technical Pro PM-21 Podcast Mixer Kit will help you say it well and will help you be heard by audiences all over the world. Inspiring all-in-one packages like these don’t come around very often, so be sure to pick yours up soon before they’re gone!


Demystifying Microphones

Samson Gtrack

An Introduction to TransductionShure SM57

Microphones are how we convert sound into audio, or more specifically electrical impulses that represent sound waves using an analogues wave form where the various peaks and troughs of a sound wave are represented in both frequency and amplitude by an electrical signal.   This process, as well as any process in which one form of energy is converted into another form of energy, is called transduction. In fact this is the exact opposite of how loud speakers work.

Different Kinds of Microphones

The key component of a microphone is the transducer which is commonly referred to as the capsule.   In music production there are two basic microphone designs.  These types are based on the type of capsule they use.

Dynamic MicrophonesDynamic Microphone

Dynamic or moving coil microphones such as the Shure SM57 (pictured above) use electromagnetic induction to recreate the electrical signal interpreted as audio.   Sound Waves from your voice or guitar amp come contact with a mylar diaphragm which is attached to a coil suspended over, on, or around a magnet.    The intended frequency response and polar pattern is the direct result of the size and type of magnet being used being ferrite or neodymium and the orientation of the coil.

Condenser MicrophonesCondenser Microphone

Condenser Microphones condenser mics such as the Audio Technica AT2020 (pictured below) operate a little differently.   Sound waves still contact a diaphragm in the same fashion but instead of being directly attached to a moving coil the diaphragm serves as one of two metallic plates suspended with an electrical charge between them.  The diaphragm plate is free to move in direct correlation with the sound waves that contact it while  the fixed back plate  remains stationary in relation to the diaphragm. Audio Technica AT2020 The electrical charge between the two plates exhibits a variable level of capacitance.  As the plates move closer and further apart with the sound waves, a bias signal directly modulated by the capacitance is interpreted as audio.  Because the transducer as well as the bias signal requires an electrical charge to operate, an external power supply is needed and is most commonly found in the form of Phantom Power.  Phantom Power is +48V of DC power typically supplied by a microphone preamp, although sometimes condenser microphones are powered by internal batteries as well as AC power supplies.

Less physical energy is needed to move the diaphragm of a condenser microphone therefore they can be much more sensitive. For this very reason dynamic microphones are used more frequently in live sound reinforcement as open air monitors tend to cause condenser microphones to feedback. Dynamic microphones are favored on drums as their simpler circuitry results in a faster more articulated response as well as high SPL tolerances.

Be sure to check out Part 2 for further information:
Polar Patterns (Demystifying Microphones, Part 2)