Method and apparatus for implementing a class D driver and speaker system

A method of operating an audio path, comprising steps of:

• operating a multi-bit sigma-delta converter for converting an N-bit digital input to an n-bit output representing an over-sampled, lower resolution n-bit version of the N-bit digital input;
• converting said n-bit output to an m signal output;
• driving m speakers with m class-D drivers individual ones of which are driven by one of said m output signals;
• and
• reordering the m output signals driving the m class-D drivers for spreading the distortion due at least to driver-speaker pair mismatch to wide band noise.

An audio path, comprising:

• a multi-bit sigma-delta modulator for converting an N-bit digital input to an n-bit output representing an over-sampled, lower resolution n-bit version of the N-bit digital input;
• a formatter for converting said n-bit output to an m signal output;
• an m-by-m switching matrix for receiving said m output signals and for reordering the m output signals;
• m class-D drivers individual ones of which are driven by one of said reordered m output signals for driving one of m speakers;
• and
• a dynamic element matching (DEM) block coupled to said switching matrix for controlling the reordering of the m output signals driving the m class-D drivers for spreading the distortion due at least to driver-speaker pair mismatch to wide band noise comprised of one of white noise or shaped noise.