| 摘要 |
A game apparatus functioning as a stereo enhancement apparatus includes a CPU, and the CPU generates sound signals of stereo sounds required for the game. The CPU adjusts volumes of stereo sounds simultaneously played from respective sound sources on the basis of pan of the respective sound sources, and mixes the plurality of stereo sounds whose volumes have been adjusted to generate a stereo sound (S5) of two channels. Next, the stereo sound including an L channel sound signal (Lin) and an R channel sound signal (Rin) that have been mixed is divided into two systems (S21), and then, a stereo enhancement signal (Lin-Rin) is generated (S23). Then, the stereo enhancement signal is delayed (S25), an added signal obtained (S27) by adding the delayed stereo enhancement signal to the Lin is generated, and a subtracted signal obtained (S29) by subtracting the delayed stereo enhancement signal from the Rin is generated. Then, the added signal is output (S31) from a speaker for L channel, and the subtracted signal is output from a speaker for R channel.
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