| 摘要 |
A sound mixing apparatus includes mixing processing units 1 1 to 1 k provided according to sampling frequencies and speaker detector 400 that selects at least one speaker sound signal out of plural sound signals inputted to mixing processing units 1 1 to 1 k . Each of mixing processing units 1 1 to 1 k adds up speaker sound signals having the same sampling frequency selected by speaker detector 400 to generate a first added-up sound signal, converts the sampling frequency of the first added-up sound signal into a sampling frequency processable by the other mixing processing units, and further adds up the first added-up sound signal and the first added-up sound signal converted into a sampling frequency processable by the processing unit and supplied from the other mixing processing units.
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