FIG. 1.

A The four location–pitch conditions. Time is represented as distance from the head so that the primer phrase (P) comes first, followed by the two concurrent digit pairs (three and four form the first pair and five and two form the second). Pitch is denoted by font weight, with boldface type representing the primer pitch and light type representing the alternate pitch. B The method of stimulus generation. Each row is a processing channel that is comb filtered and convolved with an HRIR at a certain azimuth. Pitch is denoted by font weight as above. In this example, the correct response when attending location would be [3, 5], and when attending pitch would be [4, 5].