Coffee and Nonsense

thestuntkid: laoy: resourcesnstuff: Le Pater - Alphonse...

Thu, 23 May 2013 18:55:52 -0400

laoy:

resourcesnstuff:

Le Pater - Alphonse Mucha

How we would react to celestial beings

Mr Jake - Slow More

Tue, 14 May 2013 07:37:00 -0400

It has been a long while, I have gone full circle and now I’m back I was finding myself but got lost in between the details. I do have a passion for music all who didn’t know well now you do.

Here is my new monthly cloudcast series its very introspective, It will take all your problems away and leave the music, that is all that matters, its what’s real. I do hope you all get lifted. Without Much Ado I present Episode 1 of the SLOW MORE series.

Slow More (Downtempo Essential Mix) by Mr Jake on Mixcloud

RIP Moebius, one of the greats who died one year ago today. I...

Mon, 11 Mar 2013 13:07:00 -0400

RIP Moebius, one of the greats who died one year ago today.

I got introduced to his work this year! All I can say is unbelievable I wonder what it would be like to vacation in his head

Harry Potter Concept Art: Death Eaters by Rob Bliss ‘I...

Mon, 11 Mar 2013 13:01:59 -0400

Harry Potter Concept Art: Death Eaters by Rob Bliss

‘I don’t Know whether I would be scared or amazed! Too awesome

Microphones - Coursera Peer Review Assignment

Mon, 11 Mar 2013 06:18:00 -0400

INTRODUCTION

Hello I’m Jacob Solomon from Nairobi, Kenya. This lesson is for Week 1 of Introduction To Music Production at Coursera.org. I will be teaching Microphone Basics. The focus is on Microphone Types.

LESSON

A microphone is a transducer that changes air pressure variations into electric variations. Most microphones today use electromagnetic induction this means that a voltage is produced when it is exposed to a varying magnetic field. Remember that through this whole process the signal is still in analog for and needs to be converted to a digital signal.

Microphones are referred to by their transducer principle and their directional characteristics.

DYNAMIC MICROPHONES

These microphones work through electromagnetic induction. a small movable induction coil is placed in the magnetic field of a permanent magnet attached to the diaphragm. When sound enters it moves the diaphragm and the coil. This movement creates a varying current.

Dynamic microphones are useful because they are durable and resistant to moisture and are also quite affordable.

Dynamic mics have an upper frequency response limit of 60kHz this means that they are not designed for high frequency sounds such as cymbals, bells and the upper harmonics of acoustic instruments such as the piano or the guitar. If you do record with them the top end of your recordings will sound transparent and flat.

Dynamic mics have a cardioid pick-up pattern (pick sound better from one-direction). A problem with this is what is known as the ‘proximity effect’, when the mic is close to the sound source the bass end frequencies increase considerably. To stop this the mics have been designed with a low-end roll-off frequency below 100Hz, the outcome is that if the mic is used more than a few inches away from the sound source the bass will be considerably light.

Another issue with dynamic microphones is that due to the coil/diaphragm assembly the signal has to be amplified to make it useful. The more gain you add the more noise you add to to the signal. This is only an issue if you want to record distant sounds.

Dynamic microphones have a restricted sensitivity. Sensitivity is the measure of how much electrical signal comes out of the microphone for a given level of audio input. The less sensitive a mic, the more amplification you need to get it to the right level.

In summary dynamic microphones are most effective when working with relatively loud sound sources that don’t contain a lot of very high-frequency detail.

CONDENSER MICROPHONES

They are also known as capacitor or electrostatic microphones. A condenser microphone is built with a pair of conducting plates, one fixed and the other in the form of a moving diaphragm. When the diaphragm vibrates the capacitance varies, and if an electrical charge is applied to the capacitor an electrical signal is produced that mirrors the diaphragm movement. The diaphragm is very light compared to that of a dynamic mic, that means its more efficient and can capture harmonics beyond the human hearing range. Furthermore when purchasing condenser microphones pay attention to the diaphragm size - a large diameter is chosen for vocals because of the warm sound, while a small diameter is chosen where high accuracy is needed, such as film recordings.

Like dynamic microphones, condenser mics electrical signal needs to be amplified. That is why they have a built in preamplifier, which is a factor to its high cost. Additionally, all capacitor mics need polarizing voltage power (phantom power). It is known as phantom power because the polarizing voltage is supplied via the signal leads of the microphone, no additional cabling needed. It is important to note all phantom powered microphones are balanced. Condenser microphones are generally used in studio settings, where it is quiet, due to its sensitivity. It is used for vocals, but can also be used for drum kit recording for a natural sound especially for jazz music where that is detrimental. Unlike dynamic mics which are humidity resistant, condenser microphones loose sensitivity, have intermittent noise and dulling of the high end frequencies. The only solution is to place the microphone somewhere warm it dries out.

In summary condenser mics work well in most situations and are sensitive enough to pick up quieter or more distant sounds.

Their weakness is the high cost, their reliance on external power and the susceptibility of some models to succumb to condensation

PIEZOELECTRIC/CRYSTAL MICROPHONES

Piezoelectricity means electricity resulting from pressure. It is the accumulation of electrical charge in certain materials in response to applied mechanical stress.

The contact microphone in the image above is made of a thin piezoelectric ceramic round glued to a thin alloy metal disc. the centre disc is positive while the alloy disc is negative. If the centre disc gets scratched it won’t function at optimum sensitivity.

Piezo mics are generally used as contact mics to amplify sound from acoustic instruments. Contact microphones are designed to sense sound vibrations through solid objects. Contact mics are used to record sound in high pressures (underwater). Also most saddle mounted pickups on stringed instruments are piezoelectric devices that contact the strings passing over the saddle.

EXTRA MATERIAL

Experimenting with digital microphones - http://designingsound.org/2013/02/experiments-with-digital-microphones/

How to achieve ‘Million Dollar Sound’ without A Million Dollars - http://designingsound.org/2011/03/ric-viers-special-how-to-achieve-million-dollar-sound-without-a-million-dollars/

Extra Microphone Types - http://www.paformusic.info/mics.htm

REFLECTION

Researching and compiling this lesson was really interesting to me. it was my first time learning it and I hope you learn as much as I did. An issue I had compiling this lesson was to the influx of microphone types. I restricted myself to microphone types used in the music recording process strictly. others such as the Shotgun microphones, used mostly for film were avoided. I also avoided delving into polar patterns as the lesson would not be on microphone types. I have clearly stated merits and demerits as well as application of the microphone types I have covered. as well as explain the key terms. Also if you want more information of what I have missed I have placed links under the ‘Extra Material Section’. I believe my subjective decision on microphone types could have been widened and placed under one page rather than linking away from the work. Furthermore I should have gone deeper into explaining subcategories of dynamic and condenser microphones.

REFERENCES

Articlebase. (2008, June 15). Types of Microphones and their uses. Retrieved March 11, 2013, from Articlesbase: http://www.articlesbase.com/electronics-articles/types-of-microphones-and-their-uses-450020.html

PAforMusic. (2012, April 16). Microphone Types, selections and Use. Retrieved February 10, 2013, from PAforMusic: http://www.paformusic.info/mics.htm#Care of Microphones

SoundonSound. (1995, June). Choosing A Microphone: Types and Uses. Retrieved January 11, 2013, from SoundonSound: http://www.soundonsound.com/sos/1995_articles/jun95/microphones.html

SoundonSound. (1998, April). Mic Types and Characteristics. Retrieved March 11, 2013, from SoundonSound: http://www.soundonsound.com/sos/apr98/articles/mic_types.html

decenthight: She has just entered box!

Sun, 10 Mar 2013 16:39:41 -0400

decenthight:

She has just entered box!

Mean Ice #instabest #arts #artistsontumblr

Wed, 26 Dec 2012 16:06:05 -0500

Mean Ice
#instabest #arts #artistsontumblr

Ever In The Grey: Priceless Paintings

Mon, 19 Nov 2012 14:47:37 -0500

Ever In The Grey: Priceless Paintings:

Beautiful poetry by my Bromie

everinthegrey:

We are all paintings

that have been painted by ourselves

with a limit of canvas as far as our imagination

an expression of ourselves

with different brush strokes on every part

with art as vast as our memories

with mistakes on the canvas that only we can cover up

to create something…

theartofanimation: Ani Reimi-Orsa

Sat, 03 Nov 2012 13:46:24 -0400

theartofanimation:

Ani Reimi-Orsa

theartofanimation: Robson Borges

Sat, 03 Nov 2012 12:25:06 -0400

theartofanimation:

Robson Borges

theartofanimation: Robson Borges

Sat, 03 Nov 2012 12:24:22 -0400

theartofanimation:

Robson Borges

theartofanimation: Robson Borges

Sat, 03 Nov 2012 12:14:32 -0400

theartofanimation:

Robson Borges

And here is part 2 of the story!

Sat, 03 Nov 2012 11:28:00 -0400

And here is part 2 of the story!

Great video and great Dialogue, from the people making Kenya...

Sat, 03 Nov 2012 11:26:00 -0400

Great video and great Dialogue, from the people making Kenya proud ‘Just a band’

Beauty within a synth dream. Music is Life ...

Sat, 27 Oct 2012 19:14:07 -0400

Beauty within a synth dream. Music is Life

www.facebook.com/fishinggg
www.facebook.com/yespleaserecords

‘The only measure between Insanity and Genius is...

Sat, 27 Oct 2012 07:50:12 -0400

‘The only measure between Insanity and Genius is Success’

Enjoy The Video By French Synth Pop Artist DyE.

proactivenoxzemaorphotoshop: sekoi: Novacane ....

Wed, 17 Oct 2012 05:43:43 -0400

proactivenoxzemaorphotoshop:

sekoi:

Novacane .
#naturalhair#locs#dreads (Taken with Instagram)

True Afro beauty speechless! Even more speechless

"All of those platforms — YouTube and Vimeo — are kind of the way we see filmmaking now… It already..."

Tue, 16 Oct 2012 15:56:13 -0400

“All of those platforms — YouTube and Vimeo — are kind of the way we see filmmaking now… It already has changed everything, but now even more so, young actors and young filmmakers can have something on YouTube and when they go in for a job interview, they have actual credits for their resume.”

- Now no one has a reason of not letting the world know and giving a piece of themselves to a moment in History! be out there - create and inspire

For more, read Mashable’s coverage of the Reel Works Gala

(via futureoffilm)

theartofanimation: Lipblue Very beautiful sense of colour and...

Tue, 16 Oct 2012 14:02:27 -0400

theartofanimation:

Lipblue

Very beautiful sense of colour and the compositions just remind me that i am a small piece in the puzzle that is life! definitely something i can stare at for ages at home and just smile

We are creators, creatives. all it takes is a thought and it is...

Tue, 16 Oct 2012 13:56:28 -0400

We are creators, creatives. all it takes is a thought and it is brought to life. Oour work has a meaning transcending the borders of normal understanding. Am I gifted am I wrong? Hold this pen, it is your sword and pierce the uninspired mind. Wake up and smell the coffee!

Jaws Out

Delving into the world of ‘Pixacao’, a politically driven graffiti movement in Sao Paulo, Brazil. The film highlights the extreme measures the artists go to give themselves a voice & above all a purpose. It’s graphic, real + exhilarating. ASOS X PUMA, 2 forward thinking brands come together to explore youth sub cultures around the globe. Both brands are pushing to uncover what inspires young, creative minds.

Directed by Ben Newman.