After using these connectors to link with other units, you will be able to pick a device that you wish to be in control, and use it to control the others. You can then not only get the other equipment to play, you can also cause it to switch through its sounds. About the MIDI Connectors There are three types of MIDI connectors. Each of them functions differently, as explained below. MIDI OUT Connector Transmits to an external unit's MIDI connector all the information originating on this unit (such as data describing what you are playing). MIDI IN Connector Receives the MIDI messages which arrive from an external MIDI device. Whenever a piece of equipment receives MIDI messages in this way, it will comply by playing specific notes, changing to a different sound, or otherwise do whatever it is that the messages request. MIDI THRU Connector Passes on (without change) the same stream of messages that have been flowing in at MIDI IN. The HP 1900G is equipped with two of the above types of MIDI connectors (MIDI IN and MIDI OUT). Look at the example below, then connect MIDI cables between the appropriate MIDI connectors when you want to have this instrument communicate with some other piece of equipment. Other MIDI üevii It is not always necessary to connect two MIDI cables. You should alter the above configuration to match your intentions. Before Connecting with Other MIDI Devices Before using your HP 1900G while connected with other MIDI devices, you need to make sure that it is set properly, as explained in the following. With the wrong settings, you might find that your equipment doesn't provide the expected response, or even that no sound at all is produced. Setting the Computer Switch When you wish to use MIDI to connect with an external device, you first need to set the COMPUTER switch on the rear panel to '"MIDI" (the switch to the right of that can be at any position). ‘ Always make sure to turn OFF the power on your HP 1900G before you change the setting for the COMPUTER switch. Whenever the COMPUTER switch on the rear panel is set to "MIDI/' the display will show what appears below, and you ivill not be able to use the Piano Partner. To use the Piano Partner, set the COMPUTER switch to "INTERNAL." In addition to these settings, you may also need to set the MIDI Transmit Channel or switch Local Control On/Off. Please see page 36. 34 4. About MIDI and the Computer Interface Connecting with a Computer The HP 1900G is equipped with a COMPUTER connector. After connecting a cable between this connector and the serial port on your computer, you will be able to exchange performance information between them. Important Note About Connecting with a Computer When connecting your HP 1900G with a computer, you need to make sure that it is set properly, as explained in the following. If you have it at the wrong settings, your equipment may not provide quite the expected response, or you might not hear any sound. About Computer Cables/Baud Rate You can connect your HP 1900G directly to a computer by connecting the appropriate cable between the COMPUTER connector on the HP 1900G and the serial port on your computer. Also, you need to set the COMPUTER switch on the rear panel to "COMPUTER." UV * Always make sure to turn OFF the power on your HP 1900G before you change the setting for the COMPUTER switch. * Whenever the COMPUTER switch on the rear panel is set to "COMPUTERthe display will show what appears below, and you will not be able to use the Piano Partner contained inside the HP 1900G. To use the Piano Partner, set the COMPUTER switch to "INTERNAL/' Additionally, you will need to select one of the settings explained next so that the baud rate is matched with the computer and software you are using (the baud rate is the speed at which the computer and the HP 1900G will exchange data). Examples: Connecting with a Computer in the Apple Macintosh Family Connect the cable (RSC-15 A PL; optionally available) between the modem (or printer) port on the Apple Macintosh and the COMPUTER connector on the HP 1900G. Also, set the COMPUTER switch at the right to the "MAC" position. Additionally, you should use the "Patch Bay" utility on your Macintosh to set the Interface Type to "1 MHz" (the clock speed of the MIDI interface). Connecting with an IBM PC Connect the cable (RSC-15AT; optionally available) between a serial port (COM 1 or COM 2) on the IBM PC and the COMPUTER connector on the HP 1900G. Also, set the COMPUTER switch at the right to the "PC-2" position. * Refer to the manual for your software for information on other settings (such as for baud rate) that you may need to make. In addition to these settings, you may also need to set the MIDI Transmit Channel, or switch Local Control On/Off. Please see page 36. V _y 35 4. About MIDI and the Computer Interface Settings for the MIDI Channel and Local On/Off You will not be able to use one device to play another, or be able to ch...