INTRODUCTION
YSS906 is an LSI for processing signals that uses Yamaha’s original wide surround technology, “YMERSION™”, and the tone control/loudness circuit that is built-in the device.
This LSI has the following features.
1. In addition to normal stereophonic input signal processing function, this LSI uses the pseudo stereophonic sound processing function to give listeners a feeling of extended sound field.
2. Offers the wide surround effect by using “YMERSION™” technology.
3. Use of tone control/loudness function can emphasize specific tones.

FEATURES
• Wide Surround : Surround function through the use of amplitude/phase conversion circuit
• Tone control : Bass (100 Hz +/- 10 dB), Treble (10 kHz +/- 10 dB) (recommended )
• Loudness : -30dB (recommended)
                 Note: Either the tone control or loudness can be selected.
• Other features : Stereophonic/Monaural enabling/disabling switch
                        Wide surround enabling/disabling switch
                        Wide control of wide surround
                        Tone control enabling/disabling switch
                        Bass/Treble tone control
                        Every control is made through the voltage at pins.
• Operating voltage: Wide operating voltage from 3.0 to 5.5 V
• Package : 20SKDIP (YSS906-N)
• Process : Silicon gate CMOS process