10. The device according to claim 1 , wherein each segment is analyzed in accordance with a plurality of analyses, for each segment, a plurality of emotional states and a plurality of confidence scores of the plurality of emotional states are determined in accordance with the plurality of analyses, and for each segment, the plurality of emotional states and the plurality of confidence scores of the plurality of emotional states are combined for determining the emotional state and the confidence score of the emotional state of the segment.
1. A device, comprising: a processor; and a memory storing instructions that, when executed by the processor, cause the processor to perform operations including: analyzing a plurality of segments of an audio signal based on a lexical evaluation and an acoustic evaluation; determining, for each segment of the plurality of segments, an emotional state from among a plurality of emotional states and a confidence score of the emotional state based on the analyzing of the plurality of segments; tracking a current emotional state of the audio signal for each of the plurality of segments; and determining, for a particular segment of the plurality of segments, whether the current emotional state of the audio signal changes to an other emotional state of the plurality of emotional states based on the emotional state of the particular segment and a comparison of the confidence score of the particular segment to a predetermined threshold.