12. The system as recited in claim 11 further comprising: means responsive to an absence of a corresponding audio voice for calculating a weighted average of the data in the first I/O instruction and selecting an audio voice as a closest match having a value closest to the weighted average; and, means for transmitting audio data corresponding to the audio voice which is the closest match to the second type of audio card coupled to the computer system and an expected I/O instruction to the audio application.
12. The system as recited in claim 11 further comprising: means responsive to an absence of a corresponding audio voice for calculating a weighted average of the data in the first I/O instruction and selecting an audio voice as a closest match having a value closest to the weighted average; and, means for transmitting audio data corresponding to the audio voice which is the closest match to the second type of audio card coupled to the computer system and an expected I/O instruction to the audio application. 13. The system as recited in claim 12 further comprising: means for determining whether a value of a first audio parameter in each selected set corresponding to each audio voice matches a value of the first audio parameter in the first I/O instruction where there is a single value for the first audio parameter for each audio voice; and, means for discarding any audio voice as a contender for the closest match whose first audio parameter value does not match the first audio parameter value of the first plurality of audio parameters I/O instruction.