INTRODUCTION
YSS915 (KP2V2) is an LSI for processing Karaoke voice signals. This LSI has an A/D converter (1 channel) for the microphone echo, and a memory for the microphone echo and key control. These features allow achieving the functions needed for the Karaoke system by using only one LSI chip. As for the microphone echoes, many other types of echoes are available in addition to ordinary ones so that YSS915 is applicable to various uses.
In addition to these Karaoke programs, YSS915 is able to provide the Movie & Music programs, with which the surround effect is applied to the movie and music sources for giving the users more enjoyment. YSS915 is pin compatible with and register compatible with YSS903 (KP2V).

FEATURES
[ Fundamental Functions ]
1), Karaoke program
· Key Control (Control by 50 cents in +/- 600 cent range, +/- one octave, etc.)
· Voice Cancel
Microphone Echo
· Normal microphone echo (174 msec or less (fs = 44.1 kHz))
· Stereo-Echo/ Reverb-Echo
· Microphone Key Control (+/- 10 cents, +/- 20 cents, +/- 400 cents, +/- 700 cents and +/- 1 octave)
· Microphone "YMERSION™"
Tone Control
· Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)
Surround
· "YMERSION™" (Yamaha's original wide surround technology)
2), Movie and music program
Surround
· Initial reflection sound synthesizing system
· Yamaha "YMERSION™"
Tone Control
· Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)
[ I/O Interface ]
· Digital signal inputs : 2 channels (16/18/20/24 bits)
· Digital signal outputs : 2 channels (16/18/20/24 bits)
· Analog signal input : 1 channel ( for the microphone )
· Microprocessor interface : Serial four line system
· Through mode : Digital input is outputted without any processing
(Correspond with fs = 96 kHz 24 bit DVD format)
[ Others ]
· Pin/register upper compatible with YSS903 (KP2V)
· Sampling frequency : 32, 37.8, 44.1, 48 kHz or correspond with 96 kHz through mode.
· Package : 28 pin SOP ( YSS915-M )