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Istruzioni per l'uso Roland, Modello SC-7

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27). The other Parts, those having a MIDI receive channel from 1 -9 or 11 -16, are known as Standard Parts, and are used for melody or bass, chords, etc. Sound modules such as the SC-7 are multi-timbral, which means they can simultaneously receive data on a multiple number of MIDI channels, and can play the musical data for a number of Parts simultaneously. (2) MIDI Messages Handled by the SC-7 Each of the Parts on the SC-7 is capable of receiving the following MIDI Messages: Note Messages These messages convey what is played on a keyboard or other instrument. The types of Note messages are as follows: Note Number: A number representing the position of a key on a keyboard. Note On: Indicates that a key has been pressed. Note Off: Indicates that a key has been released. Note On Velocity: The strength with which a key has been pressed. Note Numbers range from 0—1 27 and correspond with the positions of keys on a keyboard. Middle C (C4) is number 60. In the Drum Part, a different rhythm or effect sound is assigned to each Note Number. 21 Pitch Bend Change Messages These messages convey the action of the Bender Lever (wheel) that is found on many synthesizers. They allow for smooth changes in the pitch to be made. Aftertouch Messages These messages convey aftertouch (applying pressure to keyboard keys after the notes have been played initially). Many keyboards are equipped with this feature. There are two types of aftertouch; Channel and Polyphonic. Channel aftertouch provides aftertouch control for each MIDI channel, regardless of the pressure applied to individual keys. Polyphonic Aftertouch provides response to the pressure applied to individual keys. Program Change Messages These messages are used for changing sounds. Control Change Messages These messages are used to enhance the expressiveness of a performance, and include Vibrato, Hold, Volume, and Pan. Each function is identified by a Control Number ranging from 0—127, and the functions which can be controlled will vary depending on the MIDI device. • Modulation (Control Number: 1) Adjusts the depth of the vibrato effect. The actual effect obtained is set individually for each sound. •Data Entry (Control Number: 6, 38) Used to supply the value for the parameter selected for NRPN and RPN. • Volume (Control Number: 7) Provides adjustment of the volume for each Part and allows the balance to be controlled. The actual volume level obtained depends on a combination of settings; Volume (Control Number: 7), Expression (Control Number: 11), Master Volume (Exclusive), and the setting of the Volume knob. •Panpot (Control Number: 10) Provides adjustment for the sound location in the stereo field (L/R). Effective only when a stereo output is used. Orientation Left-Center — Right Pan 0 64 127 •Expression (Control Number: 11) Provides adjustment of the volume for each Part and allows the balance to be controlled. The actual volume level obtained depends on a combination of settings; Volume (Control Number: 7), Expression (Control Number: 11), Master Volume (Exclusive), and the setting of the Volume knob. •Hold 1 (Control Number: 64) Allows the sound to be sustained. (Similar to the function of an acoustic piano's damper pedal). 22 •General Purpose Effect 1 (Reverb Send Level) (Control Number: 91) Adjusts the reverb level for each Part. •General Purpose Effect 3 (Chorus Send Lev eh (Control Number: 93) Adjusts the chorus level tor each Part, •NRPN LSB, NRPN MSB (Control Number: 98, 99) •RPN LSB, RPN MSB (Control Number: 100, 101) Provide control over the sound source's parameters. The parameter to be controlled is specified by means of NRPN MSB/LSB and RPN MSB/LSB. The Data Entry message is used to set the value for the selected parameter. * For a list of parameters which can be controlled, refer to the "MIDI IMPLEMENTATION •All Sounds Off (Control Number: 120) Cuts off all sounds. •Reset All Controllers (Control Number: 121) When this message is received, the controllers will be set as follows: Pitch Bend Change +/-0 (median) Channel Pressure 0 (min.) Modulation 0 (min.) Expression 127 (max.) Hold 1 0 (off) NRPN No number selected; no change in internal data RPN No number selected; no change in internal data Active Sensing Messages These messages monitor the integrity of MIDI connections. The reception of Active Sensing messages (at MIDI IN) will cause the SC-7 to switch into a monitor mode where it continually watches for intermittent Active Sensing messages. If an interval of more than 420 milliseconds (on the SC-7) should pass without an Active Sensing message being received, the unit will assume that a cable has been disconnected or damaged. As a result, all sound production will stop, and the unit takes all the measures it normally would upon reception of a Reset All Controllers message. No further monitoring of Active Sensing messages occurs. Exclusive Messages Exclusive messages handle information tha...


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