Building local, regional and global resource centers to facilitate the emerging consciousness of green, sustainability and freedom.
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These are the best educational audio CD's we've produced over the last ten years for your listening pleasure. You'll be inspired and opened to new possibilities for the future!
- The Power and Significance of Communications Networking (CD 10)
- Establishing Global Media Centers (CD 20)
- The Plenum Theory of the Universe with Mark Comings (CD 30)
- Leadership of the Future (CD 40)
- The Future Ain't What it Used to Be (CD 50)
- Freedom Vs. Control (CD 60)
- Five Steps to Effective Social Change with Abigail Lewis (CD 70)
- Prosperity Consciousness with Fredric Lehrman (CD 80)
- What it Means to Be Chief with Fredric Lehrman (CD 100)
- IBC's Vs. Trusts (CD 110)
- Project Development (CD 120)
- Seven Aspects of Sovereignty (CD 200)
- The Essence of Sovereignty (CD 210)
- New Paradigm for Sovereignty (CD 240)
- The Taboo of Sovereignty (CD 260)
Sound recording and reproduction is an electrical or mechanical inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording. Acoustic analog recording is achieved by a small microphone diaphragm that can detect changes in atmospheric pressure (acoustic sound waves) and record them as a graphic representation of the sound waves on a medium such as a phonograph (in which a stylus senses grooves on a record).
In magnetic tape recording, the sound waves vibrate the microphone diaphragm and are converted into a varying electric current, which is then converted to a varying magnetic field by an electromagnet, which makes a representation of the sound as magnetized areas on a plastic tape with a magnetic coating on it. Analog sound reproduction is the reverse process, with a bigger loudspeaker diaphragm causing changes to atmospheric pressure to form acoustic sound waves. Electronically generated sound waves may also be recorded directly from devices such as an electric guitar pickup or a synthesizer, without the use of acoustics in the recording process other than the need for musicians to hear how well they are playing during recording sessions.
Digital recording and reproduction converts the analog sound signal picked up by the microphone to a digital form by a process of digitization, allowing it to be stored and transmitted by a wider variety of media. Digital recording stores audio as a series of binary numbers representing samples of the amplitude of the audio signal at equal time intervals, at a sample rate so fast that the human ear perceives the result as continuous sound.
Digital recordings are considered higher quality than analog recordings not necessarily because they have higher fidelity (wider frequency response ordynamic range), but because the digital format can prevent much loss of quality found in analog recording due to noise and electromagnetic interference in playback, and mechanical deterioration or damage to the storage medium. A digital audio signal must be reconverted to analog form during playback before it is applied to a loudspeaker or earphones.
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