Filter
Top Products
White Paper T610/612
16
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.
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.
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.
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 FM-synthe-
sis. Especially the treble is more distinguished.
Full colour support Yes
Certification control of
games
Yes
True sandbox technology Yes
True file support Yes
Sprite detection collision Yes
Built-in Unicode includ-
ing Chinese
Yes
Functions