Dynamically selected background music for personalized audio advertisement

1. A computer-implemented method for providing an audio message with background music, the method comprising:

selecting a vocal message for presentation to a user of a client device playing a stream of audio content;

selecting background music to accompany the vocal message, wherein selecting the background music comprises:

retrieving selection criteria associated with the vocal message, the selection criteria indicating preferences for features of background music to be played with the vocal message;

obtaining content data describing audio content provided to the client device as part of the stream;

obtaining a content reference coordinate representing audio features of the audio content described by the content data;

identifying reference music fulfilling the selection criteria;

obtaining an audio reference coordinate representing audio features of the reference music fulfilling the selection criteria;

determining a combined reference coordinate by combining the content reference coordinate and the audio reference coordinate according relative weights specified by the selection criteria;

selecting the background music from among candidate background music items based on comparisons between the combined reference coordinate and the candidate background music items; and

providing, to the client device, the selected background music and the selected vocal message, the client device configured to play an audio message comprising the background music played concurrently with the vocal message.

2. The method of claim 1 , wherein selecting the background music further comprises:

obtaining a candidate coordinate representing audio features of a candidate background music item;

determining a score for the candidate background music item based on a measure of similarity between the combined reference coordinate and the candidate coordinate; and

selecting the candidate background music item as the background music responsive to the score for the candidate background music item.

3. The method of claim 1 , wherein selecting the background music further comprises:

obtaining a user reference coordinate representing audio features of music preferred by the user of the client device; and

selecting the background music based on comparisons between the combined reference coordinate, the user reference coordinate, and the candidate background music items.

4. A non-transitory computer-readable storage medium comprising computer program instructions executable by a processor, the instructions for:

selecting a vocal message for presentation to a user of a client device playing a stream of audio content;

selecting background music to accompany the vocal message, wherein selecting the background music comprises:

retrieving selection criteria associated with the vocal message, the selection criteria indicating preferences for features of background music to be played with the vocal message;

obtaining content data describing audio content provided to the client device as part of the stream;

obtaining a content reference coordinate representing audio features of the audio content described by the content data;

identifying reference music fulfilling the selection criteria;

obtaining an audio reference coordinate representing audio features of the reference music fulfilling the selection criteria;

determining a combined reference coordinate by combining the content reference coordinate and the audio reference coordinate according relative weights specified by the selection criteria;

selecting the background music from among candidate background music items based on comparisons between the combined reference coordinate and the candidate background music items; and

providing, to the client device, the selected background music and the selected vocal message, the client device configured to play an audio message comprising the background music played concurrently with the vocal message.

5. The computer-readable medium of claim 4 , wherein selecting the background music further comprises:

obtaining a candidate coordinate representing audio features of a candidate background music item;

determining a score for the candidate background music item based on a measure of similarity between the combined reference coordinate and the candidate coordinate; and

selecting the candidate background music item as the background music responsive to the score for the candidate background music item.

6. The computer-readable medium of claim 4 , wherein selecting the background music further comprises:

obtaining a user reference coordinate representing audio features of music preferred by the user of the client device; and

selecting the background music based on comparisons between the combined reference coordinate, the user reference coordinate, and the candidate background music items.

7. A system for generating an audio message with background music, the system comprising:

a processor; and

a non-transitory computer-readable storage medium comprising computer program instructions executable by the processor, the instructions for:

selecting a vocal message for presentation to a user of a client device playing a stream of audio content;

selecting background music to accompany the vocal message, wherein selecting the background music comprises:

retrieving selection criteria associated with the vocal message, the selection criteria indicating preferences for features of background music to be played with the vocal message;

obtaining content data describing audio content provided to the client device as part of the stream;

obtaining a content reference coordinate representing audio features of the audio content described by the content data;

identifying reference music fulfilling the selection criteria;

obtaining an audio reference coordinate representing audio features of the reference music fulfilling the selection criteria;

determining a combined reference coordinate by combining the content reference coordinate and the audio reference coordinate according relative weights specified by the selection criteria;

selecting the background music from among candidate background music items based on comparisons between the combined reference coordinate and the candidate background music items; and

providing, to the client device, the selected background music and the selected vocal message, the client device configured to play an audio message comprising the background music played concurrently with the vocal message.

8. The system of claim 7 , wherein selecting the background music further comprises:

obtaining a candidate coordinate representing audio features of a candidate background music item;

determining a score for the candidate background music item based on a measure of similarity between the combined reference coordinate and the candidate coordinate; and

selecting the candidate background music item as the background music responsive to the score for the candidate background music item.

9. The system of claim 7 , wherein selecting the background music further comprises:

obtaining a user reference coordinate representing audio features of music preferred by the user of the client device; and

selecting the background music based on comparisons between the combined reference coordinate, the user reference coordinate, and the candidate background music.

10. The method of claim 1 , wherein the features of background music to be played with the vocal message comprise audio features.

11. The method of claim 1 , wherein the selection criteria further comprise bibliographic information of the reference music.