Yamaha PSR-2100 Owner's Manual - Page 158

Using Your PSR-2100/1100 with Other Devices • When using a MIDI interface with a Macintosh series computer, connect the RS-422 terminal of the computer (modem or printer terminal) to the MIDI interface, then connect the MIDI OUT terminal on the MIDI interface to the MIDI IN terminal of the PSR2100/1100, as shown in the diagram below. MIDI IN MIDI OUT RS422 MINI DIN 8-pin Now let's examine what happens when we play back a recording. When you playback a music CD (for example, a solo piano recording), you're hearing the actual sound (vibrations in air) of the acoustic instrument. This is called audio data, to distinguish it from MIDI data. Recording and playing back the performance of an acoustic instrument (audio data) Recording Playback • When using a Macintosh series computer, set the MIDI interface clock setting in the application software to match the setting of the MIDI interface you are using. For details, refer to the owner's manual for the particular software you are using. What's MIDI? Let's consider an acoustic piano and a classical guitar as representative acoustic instruments. With the piano, you strike a key, and a hammer inside hits some strings and plays a note. With the guitar, you directly pluck a string and the note sounds. But how does a digital instrument go about playing a note? In the above example, the actual acoustic sounds of the pianist's performance are captured in the recording as audio data, and this is recorded to CD. When you play back that CD on your audio system, you can hear the actual piano performance. The piano itself is not necessary, since the recording contains the actual sounds of the piano, and your speakers reproduce them. Recording and playing back the performance of a digital instrument (MIDI data) Recording Playback Acoustic guitar note production Digital instrument note production Internal amp Internal amp L Tone generator (Electric circuit) R Playing the keyboard Controller (keyboard, etc.) FD Tone generator Sequencer Pluck a string and the body resonates the sound. Based on playing information from the keyboard, a sampled note stored in the tone generator is played through the speakers. As shown in the illustration above, in an electronic instrument, the sampled note (previously recorded note) stored in the tone generator section (electronic circuit) is played based on information received from the keyboard, and output through the speakers. FD In the case of digital instruments, the audio signals are sent through output jacks (such as AUX OUT) on the instrument. 158 PSR-2100/1100