Handbook for Sound Engineers

1052 Chapter 28 yield superior SNR and reductions in amplitude modu- lation noise, the wide tracks can create level stability pr ...

Magnetic Recording and Playback 1053 required to slide the tape up or down is determined by the tape tension and the coefficient ...

1054 Chapter 28 at each wavelength that produces an odd or even number of complete cycles in the gap. The example recorder at 15 ...

Magnetic Recording and Playback 1055 Use of an excessively short gap will cause an addi- tional loss in overall head sensitivity ...

1056 Chapter 28 (28-5) where, x is 2 S× thickness/wavelength. Although this expression yields a drop of 6 dB per octave, as show ...

Magnetic Recording and Playback 1057 that retain the low-frequency output capability of older tapes, but utilize new equalizatio ...

1058 Chapter 28 (76 cm/s). Beware that this level of error will be intro- duced each time the tape is rerecorded during mixdown ...

Magnetic Recording and Playback 1059 (28-8) The previous discussion on the inductive rise of voltage with increasing frequency i ...

1060 Chapter 28 28.3.5.1 Track Width The second factor is the loss in SNR in narrow-track consumer tape formats due to the dissi ...

Magnetic Recording and Playback 1061 28.3.5.4 Magnetostrictive Noise The magnetic core material also exhibits magnetostric- tion ...

1062 Chapter 28 shunted flux raises the efficiency of the head by requiring less drive power. The conductive shim is only effect ...

Magnetic Recording and Playback 1063 Heads with very low inductance typically require a step-up transformer to achieve adequate ...

1064 Chapter 28 flux field. For a tape speed of 30 in/s (76 cm/s) and a typical decay length of the erase head field of 0.005 in ...

Magnetic Recording and Playback 1065 damage the respective electronics but will certainly “peg” any analog meters in the circuit ...

1066 Chapter 28 gradual (hopefully) drop in playback level at the shortest wavelength of interest. When these losses exceed the ...

Magnetic Recording and Playback 1067 28.3.10 Magnetic Performance Curves The input-output relationship for typical magnetic mate ...

1068 Chapter 28 film to align the particles, a technique known as rheo- logical orientation. As a result of these improvements, ...

Magnetic Recording and Playback 1069 In contrast, the graphical data in Fig. 28-33 depicts how the various values change as the ...

1070 Chapter 28 evaluating the distortion, noise, and maximum output levels for each bias setting. There are two common methods ...

Magnetic Recording and Playback 1071 varies greatly with changes in the record head gap length. Table 28-7 illustrates how this ...