Share this Page URL

Digital Audio and Reason > Space--The Final Dimension - Pg. 14

2. These bits are essentially binary data comprised of ones and zeros, each one representing "on," and each zero representing "off." Although bits can represent large numbered values, in computer terms these values translate into long strings of ones and zeros. The more bits, the more possible measurements of amplitude. This essentially will mean more volume potential to musicians. The rate at which these bits are captured is described as a frequency measured in kilohertz. This is called the sampling rate. The higher the sampling rate, the better the overall clarity of the captured bits. 3. 4. 5. Earlier in the chapter, I stated that a human ear could detect sounds ranging from 20Hz to 20kHz. Wait a tick, isn't the frequency range of a CD much higher? Yes, this is true, as a CD has a sampling rate of 44.1kHz, which is more than twice the hearing potential of a human ear. Recall, though, that the Nyquist theory that states that a waveform must be sampled twice during each cycle in order to reproduce the waveform accurately. This means that in order to reproduce the waveform clearly, the sampling rate has to be doubled in order to accurately reproduce a waveform, which would give you a potential of around 44.1kHz. Ta-da! BIT DEPTH? If you're just getting into digital audio, you should familiarize yourself with the jargon related to the field. At the top of your list should be bit depth.