6.3 CD-DA playback

audio data is transferred directly from the CD interface to SCSP and output as audio. Therefore, the main system simply issues a playback request to the CD interface, and there is no need to read data or transfer it to the sound memory. Although it is the least expensive playback method for the main system and the sound system, it occupies the CD continuously during playback. In other words, you will not be able to access the CD other than making sound. However, if that is acceptable, you will be able to achieve the maximum quality of this sound system.
The frequency and data width are fixed to 16 bits of 44.1KHz and are equivalent to the CD standard, and the pitch and tempo cannot be changed during playback. At the same time, a very large amount of audio data is required to achieve this quality, so a CD can only contain about 10 to 20 songs, just like a normal music CD. Actually it contains game programs and image data, so only about 5-6 songs can be entered.