One or more computing devices for processing digital audio content, the one or more computing devices comprising: hardware logic circuitry, the hardware logic circuitry corresponding to: (a) one or more hardware processors that perform operations by executing machine-readable instructions stored in a memory, and/or (b) one or more other hardware logic components that perform operations using a task-specific collection of logic gates, the operations including: receiving audio content from a source; forming a temporal stream of audio features, in a series of frames, that represents the audio content; generating one or more images based on the stream of audio features using one or more machine-trained models, said generating being based on recognition of: semantic information that conveys one or more semantic topics associated with the audio content; and sentiment information that conveys one or more sentiments associated with the audio content, the sentiment information being identified by converting the stream of audio features into text information and identifying the sentiment information based on the text information and the stream of audio features, the generating said one or more images comprising generating said one or more images based on the text information and the sentiment information; wherein: said generated one or more images are one or more style-enhanced images which are generated by modifying one or more original images into said one or more style-enhanced images based on the sentiment information, wherein said one or more original images are pre-existing images that most closely match the input text information and sentiment information; or said generated one or more images are generated by using a machine-trained generative model to synthesize said one or more images from a combination of the text information and the sentiment information; producing a graphical output presentation that includes said one or more generated images; and providing the output presentation to one or more display devices for display thereat, the output presentation serving as a summary of semantic and sentiment-related characteristics of the audio content. receiving audio content from a source; forming a temporal stream of audio features, in a series of frames, that represents the audio content; generating one or more images based on the stream of audio features using one or more machine-trained models, said generating being based on recognition of: semantic information that conveys one or more semantic topics associated with the audio content; and sentiment information that conveys one or more sentiments associated with the audio content, the sentiment information being identified by converting the stream of audio features into text information and identifying the sentiment information based on the text information and the stream of audio features, the generating said one or more images comprising generating said one or more images based on the text information and the sentiment information; semantic information that conveys one or more semantic topics associated with the audio content; and sentiment information that conveys one or more sentiments associated with the audio content, the sentiment information being identified by converting the stream of audio features into text information and identifying the sentiment information based on the text information and the stream of audio features, the generating said one or more images comprising generating said one or more images based on the text information and the sentiment information; wherein: said generated one or more images are one or more style-enhanced images which are generated by modifying one or more original images into said one or more style-enhanced images based on the sentiment information, wherein said one or more original images are pre-existing images that most closely match the input text information and sentiment information; or said generated one or more images are generated by using a machine-trained generative model to synthesize said one or more images from a combination of the text information and the sentiment information; producing a graphical output presentation that includes said one or more generated images; and providing the output presentation to one or more display devices for display thereat, the output presentation serving as a summary of semantic and sentiment-related characteristics of the audio content.