Lab 5

Note: you must follow the design recipe in developing these functions, with the exception that functions that produce sounds may have comments indicating what they are to produce, rather than check-expects.

• HtDP 2e, exercise 110

• HtDP 2e, exercise 111

• Develop the data definition for list-of-sounds, that contains a list of sounds. Create at least two examples.

• Develop the function third-sound-only, that accepts a list of sounds of length three or more and returns the third sound in the list. Don’t worry about what happens if the list contains two or fewer elements.

• HtDP 2e, exercise 115

• HtDP 2e, exercise 119

• Develop the function soundslen, that accepts a list of sounds and returns the total length (sum) of all the sounds in the list.

• HtDP 2e, exercise 142 (both parts)

• Develop the function tones-list, that accepts a list of frequencies and a volume in the range 0.0 to 1.0, and produces a list of sounds created with make-tone where each tone’s frequency comes from an element of the list, and all tones have the same volume, given by the original volume argument.

• Develop rs-append/l, that accepts a list of sounds and returns a single sound containing all of the given sounds, appended together.