White Paper T610/612
Functions
Full colour support | Yes |
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Certification control of | Yes |
games |
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True sandbox technology | Yes |
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True file support | Yes |
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Sprite detection collision | Yes |
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Yes | |
ing Chinese |
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MIDI - Musical Instrument Digital Interface
The T610/612 contains an advanced MIDI composer that allows the user to compose melodies and ring signals in polyphonic sound. A MIDI signal or file does not contain any music. It contains binary data (information) of how a melody is played and when this data reaches a synthe- sizer, the synthesizer will translate the binary data to music, when connected to an amplifier with speakers so that the sound becomes audible.
The development from the iMelody format to the MIDI format means a revolution to the sound quality. The MIDI files are small, and perfect for mobile devices, which have limited storage capacity.
MIDI is a specification for a communications protocol principally used to control electronic musical instru- ments. MIDI is today a well known standard used by musicians, composers and arrangers.
Polyphonic ring signals
Protocol
The T610/612 has a hardware synthesizer chip, built into the mobile phone. The software controls the MIDI files, and makes sure they fit into the hardware chip. It is pos- sible to modify the dynamics, and it is possible to make the sound escalate, start quietly and grow louder.
The T610/612 Sony Ericsson mobile phone completely supports the MIDI 1.0 detailed specification. Please visit http://www.midi.org/ for more information.
The quality of the sound heard from the speakers depends on many different things, for example on the synthesizer, the amplifier, or the speakers. An important factor for sound quality is the number of voices. The human ear cannot separate each voice if the number of voices increases above about 16, then the voices merge together. But the nuances in the music increase, and the music is experienced as more sophisticated if the number of voices increases. Many modern sound modules in syn- thesizers used by musicians have 16, 24 or 32 note polyphony. The number of voices used in the T610/612 is 32, which gives excellent sound quality.
Excellent sound quality – 32voices
The human ear can hear sounds from approximately 20 Hz up to 20 KHz. In most GSM mobile phones, the speech sound range is from 300 Hz to 3400 Hz, which is good enough for speaking, but quite poor for music. The T610/612 can handle up to 15000 Hz, equivalent to an FM stereo radio, which means excellent sound quality.
Wavetable synthesis
Sony Ericsson has chosen to implement the Wavetable synthesis, which consists of sampled real instruments, which gives a much higher quality than the
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