Music and Speech:

Music:

The relationship between music and computer has become more and more important especially thanks to development MIDI (musical instrument digital interface). Its important continuous nowadays are within the music industry.

(What is midi): the midi may be a small piece of equipments that plugs directly into port which interfaces between electronic musical instruments and computer. The midi allows the transmission of music fully scale output.

Midi basic concepts:

It is a regular that manufacturers of electronic instrument have specified. it's a collection of specifications they use in building their instruments so the instruments of various manufactures can communicate musical information between each other. A midi interface has two different components:

Hardware:

Concepts the equipments of musical instruments, stipulates that a midi port is made into an instrument, specify the midi cable and deals with signal that are sent over the cable.

Data format:

The data format encodes the knowledge traveling through the hardware. The encoding includes the notion of the start and end of a note, basic frequency, and sound volume. The midi data allowed an encoding of about 10 octaves, which cross ponds to 128 notes. The midi format is digital, grouped into midi messages which communicate one musical event between machines. These musical events are usually the action that a musician performs while playing musical instruments. for instance ten (10) minute music can create 200 KB midi data

Midi devices:

A computer can control output of individual instrument through midi interface. the information are generated with a keyboard and reproduced through a sound generator. A sequencer can stored data and modify the musical data. The sequences are a computer.

The synthesizer is that the heart of midi system. it's sort of a simple clavier with a panel full up buttons. it's the subsequent components:

sound generator

microprocessor

keyboard

control panel

auxiliary controller

memory

Midi messages:

Midi messages transmit information between midi devices and determine what times of musical events are often passed from device to device. The format of midi message consists of the status bytes which describes the type of message and another is that the data byte which is keeps the musical events. The midi messages are divided into two types:

Channel message:èWhich goes only to specify device.

System message:è visit all devices in an exceedingly midi system because the system message doesn't specify any channel numbers.

Speech:

It is an acoustic signal produced by human and machine moreover, may be perceived (accepted), understood by human and machine also.

The human adjusts very efficiently to different speakers and their speech habits. The speech signal of human comprises a subjective lowest spectral component referred to as the pitch, which isn't proportional to frequency. The human ear are often taking 600 Hz to 6000 Hz. Speech signal has two properties, which may be employed in speech processing:

Periodic behaviors

Maxima 3-5 band.