OPM
E744881
OPM is a Yamaha FM synthesis sound chip, widely used in 1980s arcade machines and computers for generating rich, multi-voice music and sound effects.
All labels observed (1)
| Label | Occurrences |
|---|---|
| OPM canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T8602843 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: OPM Context triple: [Yamaha YM2151, hasAlternativeName, OPM]
-
A.
OPMCE
OPMCE is the acronym for the Office of Portfolio Management and Customer Engagement within the Public Buildings Service, which oversees real estate portfolio strategy and customer relationships for U.S. federal properties.
-
B.
ODPM
ODPM is the commonly used abbreviation for the United Kingdom government department formerly known as the Office of the Deputy Prime Minister, which oversaw local government, housing, and regional policy.
-
C.
EOPSS
EOPSS is the Massachusetts state agency responsible for overseeing public safety, law enforcement, emergency management, and related security functions.
-
D.
OPA
OPA is a U.S. federal law enacted in 1990 that strengthens regulations and liability standards for preventing and responding to oil spills in navigable waters and shorelines.
-
E.
OPA
OPA is a U.S. federal agency within the Department of Health and Human Services that oversees family planning, adolescent health, and related population affairs programs.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: OPM Target entity description: OPM is a Yamaha FM synthesis sound chip, widely used in 1980s arcade machines and computers for generating rich, multi-voice music and sound effects.
-
A.
OPMCE
OPMCE is the acronym for the Office of Portfolio Management and Customer Engagement within the Public Buildings Service, which oversees real estate portfolio strategy and customer relationships for U.S. federal properties.
-
B.
ODPM
ODPM is the commonly used abbreviation for the United Kingdom government department formerly known as the Office of the Deputy Prime Minister, which oversaw local government, housing, and regional policy.
-
C.
EOPSS
EOPSS is the Massachusetts state agency responsible for overseeing public safety, law enforcement, emergency management, and related security functions.
-
D.
OPA
OPA is a U.S. federal law enacted in 1990 that strengthens regulations and liability standards for preventing and responding to oil spills in navigable waters and shorelines.
-
E.
OPA
OPA is a U.S. federal agency within the Department of Health and Human Services that oversees family planning, adolescent health, and related population affairs programs.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Yamaha FM synthesis chip
ⓘ
sound chip ⓘ |
| alsoKnownAs |
YM2151
ⓘ
linked to:
Yamaha YM2151
|
| applicationDomain |
arcade sound systems
ⓘ
video game music ⓘ |
| channelCount | 8 channels ⓘ |
| controlClockInput | external clock required ⓘ |
| controlInterface | memory-mapped registers ⓘ |
| dacType | internal DAC ⓘ |
| envelopeGenerator | ADSR-type envelope ⓘ |
| era | 1980s ⓘ |
| family | Yamaha YM21xx series ⓘ |
| historicalSignificance | one of the most widely used FM chips in 1980s arcades ⓘ |
| intendedUse |
music synthesis
ⓘ
sound effects generation ⓘ |
| introductionPeriod | early 1980s ⓘ |
| lfoSupport | yes ⓘ |
| lfoWaveforms | multiple LFO waveforms ⓘ |
| manufacturer | Yamaha Corporation ⓘ |
| notableFeature |
hardware LFO for vibrato and tremolo
ⓘ
independent envelopes per operator ⓘ programmable FM algorithms ⓘ rich multi-voice music capability ⓘ |
| operatorPerChannelCount | 4 ⓘ |
| operatorType | 4-operator FM ⓘ |
| outputType | analog audio output ⓘ |
| packageType | DIP package ⓘ |
| polyphonyType | 8-voice polyphonic ⓘ |
| powerSupply | +5V logic supply ⓘ |
| registerInterface | 8-bit parallel bus ⓘ |
| soundGenerationMethod | digital FM with analog output stage ⓘ |
| successor | Yamaha YM2164 ⓘ |
| technology | FM synthesis ⓘ |
| timers | 2 hardware timers ⓘ |
| usedFor |
background music in arcade games
ⓘ
sound effects in arcade games ⓘ |
| usedIn |
Japanese computers
ⓘ
X68000 computer series ⓘ
linked to:
Sharp X68000
arcade game hardware ⓘ home computers ⓘ various Capcom arcade boards ⓘ various Konami arcade boards ⓘ various Sega arcade boards ⓘ |
| voiceCount | 8 ⓘ |
| waveformType | sine wave operators ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: OPM Description of subject: OPM is a Yamaha FM synthesis sound chip, widely used in 1980s arcade machines and computers for generating rich, multi-voice music and sound effects.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.