Automated compilation of music
AssigneeHewlett-Packard Company
InventorDavid Trevor Cliff
Life of this patent
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Abstract
During mixing of two musical tracks, the variations in combined output volume are reduced by analysing either the intrinsic amplitude at which each track was mastered or the output amplitude (i.e. subsequent to amplification of the audio signal), and modifying either the intrinsic amplitude or amplification during the mixing phase. Musical clashes during mixing are avoided by analysing intrinsic amplitudes of the two tracks at similar frequencies to detect the likelihood of a clash, and in the event a clash is detected, reducing the output amplitude of one of the tracks at the relevant frequency.
Claims29
A method for the automated mixing of at least two pieces of musical content comprising the steps of:
- selecting first and second sections of first and second tracks respectively, over which transition between playing the first and second tracks will be made;
- analysing intrinsic recorded amplitude of the first and second tracks over the first and second sections respectively;
- simultaneously playing the first and second sections of the first and second tracks;
- effecting transition from playing the first track to playing the second track by reducing output amplitude of the first track over duration of the first section and increasing output amplitude of the second track over duration of the second section;
- and
- using analysis of the intrinsic amplitude of at least one of the first and second tracks to equalise variations in net output volume from the first and second tracks over the duration of the transition.
Wherein equalisation provides a substantially constant net output amplitude over duration of the transition.
Apparatus for equalising output amplitude of first and second sections of musical content intended for simultaneous output, the apparatus comprising:
- first and second audio data sources on which the first and second sections of the musical content are stored;
- first and second music players, adapted to generate first and second audio signals from the first and second audio data sources respectively;
- an amplifier for amplifying the first and second audio signals;
- an analyser, adapted to analyse at least first and second audio signals, and to determine an extent to which combined intrinsic amplitude of the first and second audio signals, resulting from simultaneous playing of the signals, varies from a constant value.
Dependencies are inferred from the claim text.