uw4

UW Course Outline
Analog and Digital Recorders

A. AUDIO/VIDEO MAGNETIC RECORDING

1. Why do we still need/want analog tape machines?
- personal experiences with Chamberland Berlin Mixes album
- give out records

2. problems associated with analog
- alignment
- noise

3. the ATR as a memory device
- read 1st paragraph, p.180
- basis of tape recording (keep this simple)

4. Magnetic Tape
- makeup of magnetic audio tape
* base material, generally PVC
* magnetic domains
** smallest known permanent magnets
** domain orientation for producing an overall recorded flux, fig. 5.2

5. characteristics of magnetic tape
- dynamic range – noise vs. saturation
* random pickup of individual domains
* saturation, total orientation
- print-through (magnetic leakage to adjacent outer layer)

Questions: Are analog recorders a thing of the past? Why/why not?

B. THE BASICS OF DIGITAL AUDIO

1. The “word”
- letters, alpha “bits”, words
- bits, digital words, analog equivalent (cat)
- digital device can process data (words) very quickly
- binary counting
* 8 bit = 256 steps
* 16 bit = 65,536 steps
* 24 bit = 16,777,216 steps

2. Digital Basics (two components)
- Sampling (frequency)
* sample rate
* Nyquist Theoem

- Quantization (amplitude)
* signal-to-error
* Dither

3. Need for Quality Conversion Techniques
- discussion
- interface vs. external DAC
- need for a stable clock (external clock?)
- Jitter (p. 201 MRT)

4. Workstation choices and types
- Music
- Recording
- Looping software
- Mixing in the box vs. not (your choice)

5. File formats and rates
- AIFF
- WAV (most common)
- FLAC
- 44.1/48/96?
- 16bit/24bit

6. Backup schemes
- At least 3 places (one off site)

7. Hard drives
-

8. Naming schemes
- i.e. “N7_dmh_haida_raven_20_2496_01_scotchbroom17″
- Documentation (Doc directories)

9. Interface choices and types
- Portable
- Multichannel

10. Interface/controller
- hardware
- software app

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