science

MPMan

MPMan 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 MPMan rather than just read about it. In short: The MPMan music player, manufactured by the South Korean company SaeHan Information Systems, debuted in Asia in March 1998, and was the first mass-produced portable solid state digital audio player. The internal flash memory could be expanded, but there was no support for external memory.

Key takeaways

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

Reference excerpt

The MPMan music player, manufactured by the South Korean company SaeHan Information Systems, debuted in Asia in March 1998, and was the first mass-produced portable solid state digital audio player. The internal flash memory could be expanded, but there was no support for external memory. It was delivered with a docking station. To put music into the device, the music first had to be encoded in the mp3 format by an encoder provided by the user, and then transferred via the parallel port to the docking station that connected to the portable player device. On 2 May 1998 in Japan the Akihabara "Akibaoo~" stores in Chūō, Tokyo started selling 32 MB and 64 MB models, the prices of which were 39 800 yen (circa 400 USD - today $790.12) and 59 800 yen, respectively. In North America, the South Korean device was first imported for sale by Michael Robertson's Z Company in mid-1998. Around the same time, Eiger Labs, Inc. imported and rebranded the player in two models, the Eiger MPMan F10, and Eiger MPMan F20. Owners could upgrade the memory from 32 MB to 64 MB by sending the player back to Eiger Labs with a cheque for 69 + 7.95 USD shipping. A compact device, it measured 90 mm tall by 70 mm wide by 16.5 mm thick and weighed a little over 65 grams. The US price in 1998 for the F10 model with 32 MB flash memory was circa 200 - 250 USD. The Eiger MPMan F20 was a similar model that used 3.3 V SmartMedia cards for expansion, and ran on a single AA battery, instead of rechargeable NiMH batteries.

Technical data MPMan MP F-10 Player device: Memory: 16/32/64/128 (MP-F60 T12) MB Dimensions: 16.5 mm thick, 70 mm wide, 90 mm tall Weight: 65 grams (without battery) Signal/Noise ratio: 70 dB Distortion rate: 0.1% Maximum output: 5 mW Output Connector: 3.5 mm stereo TRS connector for headphones Frequency response: 20 – 20,000 Hz Power Supply: Rechargeable Battery (gum type DC 1.2V 1000mAh x 2) Power Supply (MP-F60 T12): (Rechargeable) AA Battery DC 1.5V x 1 Available colors: Gold, Pink, Silver, Skeleton black, Blue Docking station: Dimensions: 30 mm thick, 133 mm x 110 mm Weight: 80 grams Power: DC 9V 400mA (AC adapter included)

Technical data MPMan MP-F60 T12 Player device: Memory: 16/32/64/128 MB Dimensions: 16.5 mm thick, 70 mm wide, 90 mm tall Weight: 65 grams (without battery) Signal/Noise ratio: 70 dB Distortion rate: 0.1% Maximum output: 5 mW Output Connector: 4 pin 3.5 mm stereo TRS connector for headphones and wired remote. Frequency response: 20 – 20,000 Hz Power Supply: one DC 1.5V (Rechargeable) AA Battery Available colors: Gold, Pink, Silver, Skeleton black, Blue Audio recording function and AM / FM radio. Memory expansion by Smart Media Cards.

Critical reception The Recording Industry Association of America's (RIAA) Associate Director of Anti-Copyright infringement initially said the MPMan had "no function other than playing material that was stolen from record companies". Nevertheless, he later said it was "a unique device. It's something that we haven't seen on the market before".

References

Illustrations

Worked examples

Example 1 — a first encounter with MPMan

Start with the simplest possible case. Write down what MPMan 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 MPMan 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 MPMan 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 MPMan

In research: MPMan 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 MPMan 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: MPMan is common in secondary-school and first-year university syllabi. It links to neighbouring topics Audiovisual introductions in 1998, Digital audio players, South Korean inventions, so understanding it makes those chapters shorter.
In everyday life: Look for MPMan 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 MPMan in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MPMan 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 MPMan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is MPMan in simple terms?

Why does MPMan 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 MPMan?

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 MPMan.