Subtitles of the Movie

Tape based recording is a linear medium, you need to rewind or fast-forward a tape to hear a particular spot in a recording. To rearrange or repeat material in a linear tape based system, you need to re-record it. Hard disk recording is a non-linear or random access medium. You can go immediately to any spot in a recording without having to rewind or fast forward. [00:00:3 0.0] Hard disk editing lets you perform edits on a sound file non-destructively and then you choose from different versions of the same sound file. If you don't like the result of an edit you can undo it, or save it and make edit decisions later. Non-linear systems have other advantages, you can easily rearrange or repeat parts of a recording again. This is done nondestructively, meaning the original recorded material is not altered. Pro Tools is a non-linear recording system that let's you rearrange and mix recorded material non-destructively. In this lesson, we cover some of the terms and concepts that are universal to hard disk recording and audio engineering. The longer you work in this medium, the more you will realize the importance of comprehending the lingo. For instance, understanding the fundamental concepts of frequency will mean that you will be able to produce better mixes through the correct use of equalization. These examples are over-simplified; so it will serve you well to do additional studying Be your own instructor and look for this type of information in books, on the web or in the Pro Tools reference guide. In the VIP folder on this CD I've provided you with a detailed list of reference sources. This is a periodic wave born; it could be your kid sister whistling or it could be Ozzie Osborne yodeling in Tahiti. Whatever it is, our goal in digital recording is to capture that analog signal and bring it into the computer. Amplitude is the maximum value of a periodic waveform; above or below, it's center frequency or Zero crossing. Frequency is the rate of periodic cycles that occur over a 1 second period in a periodic waveform. Frequency is measured in Hertz. When we view waveforms in Pro Tools, we are mostly looking at rapid successions of captured frequencies in milliseconds. Not all waveforms are periodic, such as percussion instruments; but they can still be measured and sampled. The way we capture these precious analog waveforms is through analog to digital or AD converters like the ones on your DG001. The quality of our capture of our analog signal will depend on the quality of our AD converters, the sample rate and the bit depth to which we capture. Sample rate refers to how frequently incoming audio is sampled per second during conversion, from an analog to a digital signal. Bit depth also called bit resolution or bit rate, defines how precisely a sound's dynamic range is represented. Once we have captured our analog signal, it becomes digital audio. Digital audio is a series of binary 1s and 0s captured from an analog signal through sampling and quantization. This is the state of your audio information while it is in the computer. The beauty of digital audio lies in the control we gain once we have it inside the computer, where we can perform countless DSP processes. And we can always change our mind and go back to the original at any time. DSP stands for Digital Signal Processing, and refers to the manipulation of digital audio such as with the execution of audio suite plug-ins. We have huge advantages when learning these concepts in Pro Tools. Many of these concepts can be best understood using the visual aids we have at our disposal when we work in Pro Tools. As an example, let's look at the waves Q10 plug in. Our gain can be adjusted in the range of -18 to +18 decibels and these numbers represent the frequency spectrum, where we have the low end at 16 Hz and the high end at 16k Hz; and here represented in the T-rack CQ. Or precision metering in the waves PAZ frequency meter, which displays real time frequency analysis. We get deep into these concepts and the operation of these tools as we work through this CD. And you will be on the road to creating your own masterpieces in Pro Tools. [Music.]