Channel::setMixMatrix

Sets a 2D pan matrix that maps input channels (columns) to output speakers (rows).

C++ Syntax

FMOD_RESULT Channel::setMixMatrix(
  float *matrix,
  int outchannels,
  int inchannels,
  int inchannel_hop
);

C Syntax

FMOD_RESULT FMOD_Channel_SetMixMatrix(
  FMOD_CHANNEL *channel,
  float *matrix,
  int outchannels,
  int inchannels,
  int inchannel_hop
);

Parameters

matrix: Address of a 2 dimensional array of volume levels in row-major order. Each row represents an output speaker, each column represents an input channel.
outchannels: Number of output channels (rows) in the matrix being passed in, from 0 to 32 inclusive.
inchannels: Number of input channels (columns) in the matrix being passed in, from 0 to 32 inclusive.
inchannel_hop: Width of the memory the matrix is being stored in. Allows the function to skip memory after processing each row. If your inchannels = 2, and the array size is 32, then 32 would be the hop size.

Return Values

If the function succeeds then the return value is FMOD_OK.
If the function fails then the return value will be one of the values defined in the FMOD_RESULT enumeration.

Remarks

Levels can be below 0 to invert a signal and above 1 to amplify the signal. Note that increasing the signal level too far may cause audible distortion.

The matrix size will generally be the size of the number of channels in the current speaker mode. Use System::getSoftwareFormat to determine this.

If a matrix already exists then the matrix passed in will applied over the top of it. The input matrix can be smaller than the existing matrix.

A 'unit' matrix allows a signal to pass through unchanged. For example for a 5.1 matrix a unit matrix would look like this: