Yamaha YMF744B (DS-1S) Manuel D’Utilisation

February 3, 1999

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      LOGOS

1. GM system level 1

GM system level 1 is a world standard format about MIDI synthesizer which provides voice arrangements

and MIDI functions.

2. XG

XG is a format about MIDI synthesizer that is proposed by YAMAHA, and keeps the upper compatibility of

GM system level 1.    The good points are the voice arrangements kept extensively, a large number of the

voices, modification of the voices, 3 kinds of effects, and so on.

3. SONDIUS-XG

Products bearing the SONDIUS-XG logo are licensed under patents of Stanford University and YAMAHA

Corporation as listed on <http://www.sondius-xg.com>.  The SONDIUS-XG produces acoustic sound

outputs by running a virtual simulation of the actual acoustic instrument operation.    Therefore, it provides

much more real-world acoustic sound outputs fundamentally different from the Wavetable sound generator

that simply processes the recorded acoustic sound sources only.    The SONDIUS-XG adds the technology

of virtual acoustic sound to the XG format.

4. Sensaura

Sensaura is a technology which provides 3D positional audio and moving effect by HRTF (Head Related

Transfer Function) with 2 speakers or headphone.    This feature makes it possible to enjoy invariable and

unchangeable sound feelings in all-positional area covering as wide as 360 degrees.

GENERAL MIDI logo is a trademark of Association of Musical Electronics Industry (AMEI),

and indicates GM system level 1 Compliant.

XG logo is a trademark of YAMAHA Corporation.

SONDIUS-XG logo is a trademark that Stanford University in the United States and

YAMAHA Corporation hold jointly.

Sensaura logo is a trademark of Central Research Laboratories Limited.