Methods, apparatus, systems and articles of manufacture are disclosed to determine tags for unknown media using multiple media features. The methods, apparatus, systems and articles of manufacture for tagging unknown media, extracts audio features from an audio portion of the unknown media. The methods, apparatus, systems and articles of manufacture for tagging unknown media, extracts image features from image portions of the unknown media. The methods, apparatus, systems and articles of manufacture for tagging unknown media, weights the audio features with respect to the image features or weights the image features with respect to the audio features based at least partially on the recognition technology used to extract the feature. The methods, apparatus, systems and articles of manufacture for tagging unknown media, searches a database of pre-tagged media using the weighted features to generate a list of suggested tags for the unknown media. The methods, apparatus, systems and articles of manufacture for tagging unknown media, tags the unknown media with approved tags from the list of suggested tags.