CHAPTER 9: MIDI SUPPLEMENT

(This chapter is adapted with permission from Power Sequencing with Master Tracks Pro/Pro 4 and The Complete Guide to the Alesis HR-16 and MMT-8,copyright 1990 and 1989 respectively by AMSCO Publications.)

9 . 1 MIDI BASICS

Most current electronic instruments, including the SR-16, contain an internal computer. Computers and music have been working together for decades, which is not surprising considering music's mathematical basis (consider frequencies, harmonics, vibrato rates, tunings, etc.). In the mid-70s, microcomputers became inexpensive enough to be built into consumer-priced musical instruments. They were used for everything from sound generation to storing parameters in memory for later recall.

In 1983, the MIDI (Musical Instrument Digital Interface) specification was introduced to better exploit the computers inside these new musical instruments, primarily to insure compatibility with equipment from other manufacturers. MIDI expresses musical events (notes played, vibrato, dynamics, tempo, etc.) as a common "language" consisting of standardized digital data. This data can be understood by MIDI-compatible computers and computer-based musical instruments.

Before electronics, music was expressed exclusively as written symbols. By translating musical parameters into digital data, MIDI can express not only the types of musical events written into sheet music, but other parameters as well (such as amount of pitch bend or degree of vibrato).

9.1A MIDI Hardware

MIDI-compatible devices usually include both MIDI in and MIDI out jacks, which terminate in

5-pin "DIN" connectors. The MIDI out jack transmits MIDI data to another MIDI device. As you play a MIDI controller such as a keyboard, data corresponding to what you play exits the MIDI out jack. Example: if you play middle C, the MIDI out transmits a piece of data that says "middle C is down." If you release that key, the MIDI out transmits another piece of data that says "middle C has been released." If the keyboard responds to the dynamics of your playing, the note data will include dynamics information too. Moving the modulation wheels and pedals attached to many synthesizers will also generate data associated with the wheel or pedal being used.

The MIDI in jack receives data from another MIDI device. In addition to the type of performance data described above, rhythmically-oriented MIDI devices (e.g., drum machines) can often transmit and/or receive additional MIDI timing messages that keep other rhythmically-oriented units in a system synchronized with each other.

An optional MIDI thru jack provides a duplicate of the signal at the MIDI in jack. This is handy if you want to route MIDI data appearing at one device to another device as well. The SR-

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Alesis SR-16 manual Midi Supplement, Midi Basics, 1A Midi Hardware
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SR-16 specifications

The Alesis SR-16 is a legendary drum machine that has carved its niche in the realm of music production since its initial release in the early 1990s. Renowned for its affordability and user-friendly interface, the SR-16 has become a staple for musicians, producers, and composers across various genres. Its robust set of features and reliable performance make it an attractive choice for both beginners and seasoned professionals.

One of the standout features of the Alesis SR-16 is its expansive library of high-quality drum sounds. It houses 233 onboard drum and percussion sounds, encompassing everything from acoustic drum kits to electronic beats. The samples are derived from real instruments and meticulously recorded to provide a rich, authentic sound that can enhance any musical project. Additionally, the SR-16 allows users to layer and mix different sounds, giving them the flexibility to create customized drum tracks.

The SR-16 employs advanced sequencing capabilities, letting users create intricate patterns and beats with ease. It offers 50 preset patterns, spanning multiple musical styles, which can be edited and modified to suit individual needs. Users can also record their own patterns in real-time or step mode, allowing for greater creativity and control over the final output.

Alesis has designed the SR-16 with a user-friendly interface, featuring a backlit LCD screen and intuitive layout that simplifies the programming process. This accessibility makes the drum machine ideal for live performances as well as studio sessions. Furthermore, the SR-16 includes facilities for triggering sounds via MIDI, enabling seamless integration with other hardware and software setups.

Another notable feature is the onboard effects processing, which enhances the sound quality and provides additional sonic possibilities. The SR-16 includes reverb and filter effects, allowing users to manipulate their sounds and create depth within their musical arrangements.

The compact and rugged build of the Alesis SR-16 makes it suitable for musicians on the go. With its substantial battery life and adaptability for power sources, it is a reliable companion for live performances or recording sessions.

In conclusion, the Alesis SR-16 stands out as an essential tool for anyone looking to expand their musical toolkit. With its high-quality sounds, intuitive sequencing, and versatility, it remains a relevant choice decades after its introduction, merging classic design with modern technological advancements. Whether for crafting beats in the studio or performing live, the SR-16 delivers a unique and engaging drumming experience.
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