p. 8:
Switch the chart headings Open End and Closed End

p. 26:
Following equation 2-14, add:
While the equation to calculate decibels is slightly different for pressure than it is for power and intensity, the adjustment produces a similar change in decibels regardless of whether intensity or pressure is being measured. To understand why, it is helpful to consider how these properties change when the distance of a sound source changes. As the distance from a sound event changes, intensity changes according to the inverse of the relative distance squared (this is called the inverse square law), while pressure changes according to the inverse of the distance. Thus, when the distance from the sound event doubles, the intensity drops by one-quarter, a change of -6 dB of intensity. The pressure level drops by one half, a change of -6 dB of pressure. Similarly, if the distance changes by a factor of one half (the listener is half as close to the event as in the previous example), the intensity changes by one over one-half squared, or by a factor of four. This corresponds to a change of 6 dB of intensity. The pressure changes by a factor of one over one-half, or by a factor of two. This also corresponds to a change of 6 dB of pressure.

p. 16:
Paragraph two, line four should read: "...meaning that the pressure level is increasing..." p. 24:

p. 50:
The second bullet point should read as follows:
Computers represent numbers with a fixed-size group of bits, called a word. The word size or length (often 16, 24, 32, or 64 bits) depends on the computer processor's architecture. A group of eight bits is called a byte.

p. 51:
There are three references to a "hexadecimal bit." This should be "hexadecimal digit."

p. 52:
The comparisons of base 10 and two's complement numbers at the top of the page should be:

For further clarification:
Add the following to the beginning of the next paragraph, following those two equations:
For a two's complement system of n bits, the upper half of the range (MSB=1) represents negative numbers, while the lower half of the range (MSB=0) represents positive numbers. Thus, with 4 bits, the values -8 to +7 may be represented.

For further clarification, add the following (in bold):
Third line of this paragraph:
...A is added to the two's complement representation of the subtrahend, B. If the result requires a 1 to be carried over to a new left-most bit..."

p. 73:
The definition of byte 3 of the Note Off message should be velocity, not status.

p. 77:
In the paragraph below the table, the 14-bit binary value should read as follows:
00000010000010
(remove one of the zeroes between the ones)

p. 106:
Missing verb in the sentene following the aliasing equation. It should read "...that the frequency is phase inverted."

p. 116, first paragraph:
For clarity, add the following after the first sentence:
Feedforward filters are simple in-out devices: a signal goes in, and comes out with its spectrum adjusted by the filter.
After the second sentence, add the following:
A feedback filter recirculates its output back into its input, so that the filter's output is combined with the incoming signal input. This is similar to what happens with a PA system when a microphone is placed too near a loudspeaker, and a loud squeak results as the loudspeaker's output is picked up by the microphone and sent back to the loudspeaker in a recirculating fashion. In the same fashion...

p. 174
Last line on the page should read:
Thus, the walls of the room act as pressure antinodes, and . . .