Audiovisual capture and sharing framework with coordinated user-selectable audio and video effects filters

A method comprising:

• capturing coordinated audio and video streams at a portable computing device;
• processing the audio and video streams in respective and coordinated audio and video pipelines, wherein coordination of the respective audio and video pipelines includes either or both of (i) using one or more features extracted in the audio pipeline in the processing by the video pipeline and (ii) using one or more features extracted in the video pipeline in the processing by the audio pipeline;
• and
• on the portable computing device, audiovisually rendering output of the coordinated audio and video pipelines.

A method comprising:

• capturing coordinated audio and video streams using a portable computing device, the captured audio stream including vocals;
• selecting from amongst predefined pairs of coordinated audio and visual effects to be applied in audio and video pipelines of the portable computing device,
• automatically generating musical accompaniment for the vocals based on a selection of chords that are harmonies of melody pitches detected in the vocals and further based on a statistical model of chord progressions;
• and
• audiovisually rendering the audio and video streams with the coordinated audio and visual effects applied.

The method of 45, wherein the audio effects include one or more of:

• a reverb or echo effect;
• a chorus or harmonize effect;
• a band-limited filter evocative of telephone, citizens' band (CB) radio or vintage audio;
• and
• an overlay track.

The method of 45, wherein the video effects include one or more of:

• a chromatic shift;
• a brightness or contrast change;
• a sharpening or blurring;
• and
• a video gating or overlay.