science

Roland CR-78

Roland CR-78 is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Roland CR-78 rather than just read about it. In short: The Roland CompuRhythm CR-78 is a drum machine released by Roland Corporation in 1978. It was adopted by new wave musicians and by acts including Phil Collins, Hall & Oates, OMD, Tears for Fears, Blondie and Radiohead.

Key takeaways

Roland CR-78 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Roland CR-78 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Roland CR-78 from memory before moving on to harder problems.

Reference excerpt

The Roland CompuRhythm CR-78 is a drum machine released by Roland Corporation in 1978. It was adopted by new wave musicians and by acts including Phil Collins, Hall & Oates, OMD, Tears for Fears, Blondie and Radiohead.

Development In the 1960s, drum machines were most often used to accompany home organs. They did not allow users to program rhythms, but instead offered preset patterns such as bossa nova. By the late 1970s, microprocessors were appearing in instruments such as the Roland MC-8 Microcomposer. The Roland founder, Ikutaro Kakehashi, realized they could be used to program drum machines.

Features

The CR-78 was the first drum machine to use a microprocessor. It was also the first drum machine with which users could write, save and replay their own patterns. It came with 17 preset patterns, including bossa nova, samba, mambo, beguine, rhumba and waltz, each with two variations. Pressing two buttons simultaneously plays a combination of the two patterns. Fills and breaks can also be added. The CR-78 offers 14 sounds, with four-note polyphony (meaning it can produce up to four sounds at the same time). The sounds are generated with analog synthesis, meaning they do not use samples (prerecorded sounds). They include a kick, snare, rimshot, hi-hat, cymbal, and high and low congas and bongos. Roland also released a smaller unit, the CR-68, which could not be programmed.

Legacy The CR-78 was released in 1978 and initially received little attention. According to Gordon Reid of Sound on Sound, it initially seemed similar to other drum machines and its presets made it resemble those built into home organs. The CR-78 has been used in songs including "In the Air Tonight" by Phil Collins, "I Can't Go for That (No Can Do)" by Hall & Oates, "Enola Gay" by OMD, "Mad World" by Tears for Fears, "Heart of Glass" by Blondie, and in live performances by Radiohead. It became popular with new wave musicians in the late 1970s and early 1980s. MusicRadar wrote in 2021 that while the CR-78 did not offer the "floor-shaking rumble" of Roland's later machine, the TR-808, it "pumps and percolates, ticks and snaps in its own special way. The raw analogue drum tones are bursting with character and it can add instant atmosphere to a mix."

References

External links Roland CompuRhythm CR-78 Demo (YouTube video) Polynominal.com CR78 resources: manual, schematics and audio demo

Worked examples

Example 1 — a first encounter with Roland CR-78

Start with the simplest possible case. Write down what Roland CR-78 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Roland CR-78 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Roland CR-78 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Roland CR-78

In research: Roland CR-78 appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Roland CR-78 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Roland CR-78 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Analog drum machines, Drum machines, Japanese inventions, so understanding it makes those chapters shorter.
In everyday life: Look for Roland CR-78 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Roland CR-78 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Roland CR-78 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Roland CR-78 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Roland CR-78 in simple terms?

Why does Roland CR-78 matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Roland CR-78?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Roland CR-78.