Yamaha PortaSound PSS-790 Owner's Manual page 3

Congratulations !
Features
Owner's Manual
Thank you for purchasing YAMAHA PortaSound PSS-790. The PSS-
790 is adopted with a unique synthesis "Advanced Wave Memory (AWM)"
so that you can perform with a wide range of natural to hyper-natural
sound qualities.
Additionally, the Vector Synthesizer function enables you to carry out time
variance of a tone with controlling mixing ratio of any 4 AWM Voices you
select.
Furthermore, the Auto Accompianment function supports your
performance on the keyboard with various music styles such as rock 'n'
roll, jazz, latin, funk, and much more. Moreover, you can record and play
back your performance with the Song Memory Function. And other
useful functions are also provided. In order to fully enjoy your lifelong
musical time spent with the PSS-790, please read the instructions in this
Owner's Manual which should provide help and suggestions.
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Built-in Hi-Fi stereo speakers with Ported Bass Boost unit.
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100 pre-set AWM Voices and 50 rhythm patterns (50 styles)
included. (sound reproduction: 28 notes at the same time)
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Vector Synthesizer function offers your original sound creation from
any 4 Voices by mixing them with the Joy Stick.
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Harmony effect gives harmonized notes to a phrase or passage you
play. 6 Harmony Types are provided.
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Auto Accompaniment function allows you to make an ensemble in
any of 50 styles. A "Style" includes total arrangement for a certain
musical style, which consists of rhythm patterns, chords, obbligati,
formation of instruments and so on. You can easily and automatically
incorporate these techniques into your playing which gives you the
characteristics of the style you choose.
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Song Memory function enables 8 track digital recording and
memorization of up to 8 songs.
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8 Drum Pads allow you to manually play up to 8 percussion sounds at
any time. You can also assign to these pads any 8 instrumants you like
from among 50 percussion sounds provided.
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The PSS-790 has MIDI connectors so that you can play it together
with other MIDI-equipped devices. "MIDI" is an abbreviation for "Musical
Instrument Digital Interface " and an international standard for electronic
musical instruments. Furthermore the PSS-790 has the Multi-Timbre :
mode, which allows you to make an ensemble of Multiple Parts just only
with one unit of the PSS-790.