# programmable sound generator

> sound chip that generates audio signals built from one or more basic waveforms

**Wikidata**: [Q1995838](https://www.wikidata.org/wiki/Q1995838)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Programmable_sound_generator)  
**Source**: https://4ort.xyz/entity/programmable-sound-generator

## Summary
A programmable sound generator (PSG) is a sound chip that generates audio signals built from one or more basic waveforms. As a subclass of integrated circuits designed for computer sound, it serves as a foundational component in audio hardware synthesis.

## Key Facts
*   **Definition:** A sound chip that generates audio signals constructed from one or more basic waveforms.
*   **Abbreviation:** Commonly referred to by the alias **PSG**.
*   **Classification:** It is a distinct subclass of **sound chip**.
*   **Historical Examples:** Notable implementations include the **Texas Instruments SN76477** (incepted 1978) and the **Texas Instruments SN76489** (incepted 1979).
*   **Associated Hardware:** The term encompasses or relates to chips such as the **General Instrument AY-3-8910**, **MOS Technology SID**, and **Yamaha YM2203**.
*   **Wikidata ID:** Identified by the Freebase ID `/m/02x02z1`.

## FAQs
### Q: What is the primary function of a programmable sound generator?
A: A programmable sound generator functions as an integrated circuit that creates audio signals using one or more basic waveforms, serving as a core component for sound generation in computers and electronic devices.

### Q: What is the difference between a PSG and a standard sound chip?
A: A PSG is a specific subclass of sound chip defined by its method of generating audio from basic waveforms, whereas "sound chip" is a broader category of integrated circuits for computer sound.

### Q: What are well-known examples of programmable sound generators?
A: Prominent examples include the General Instrument AY-3-8910, the MOS Technology SID, the Ricoh 2A03, and the Texas Instruments SN76489.

## Why It Matters
The programmable sound generator (PSG) represents a critical category in the history of electronic audio hardware. As a subclass of the sound chip, the PSG established the standard method for early computers, gaming consoles, and arcade machines to produce audible feedback and music. By generating audio signals derived from basic waveforms, these chips allowed programmers to synthesize sounds programmatically rather than relying on pre-recorded samples, which was essential during the era of limited hardware resources.

The widespread adoption of PSGs is evidenced by their presence in diverse hardware architectures. Major semiconductor manufacturers like Texas Instruments, General Instrument, Yamaha, and Ricoh developed distinct PSG models—such as the SN76489, AY-3-8910, and 2A03—that powered millions of devices. This technology enabled the distinct, characteristic audio identities of early computing platforms and remains a focal point for the study of chip-tunes and retro-computing audio synthesis.

## Notable For
*   **Waveform Synthesis:** Defined by the generation of audio signals built from one or more basic waveforms.
*   **Hardware Diversity:** Implemented by numerous manufacturers including Yamaha, Texas Instruments, General Instrument, and Ricoh.
*   **Gaming Integration:** Utilized in specific hardware implementations like the Konami SCC and Ricoh 2A03.
*   **Speech Capabilities:** Associated families include digital speech synthesizer circuits like the General Instrument SP0256.

## Body

### Definition and Classification
A **programmable sound generator (PSG)** is a type of integrated circuit categorized as a **sound chip**. Its defining characteristic is the capability to generate audio signals constructed from one or more basic waveforms. It is recognized in knowledge bases (such as Wikidata and Wikipedia) as a distinct subclass of sound chips.

### Notable Implementations and Types
The PSG category encompasses several specific chip families and models developed by various manufacturers:

*   **Texas Instruments:**
    *   **SN76477:** A sound generating integrated circuit incepted in **1978**.
    *   **SN76489:** A programmable sound generator chip incepted in **1979**.
*   **General Instrument:**
    *   **AY-3-8910:** A widely used sound chip.
    *   **SP0256:** A family of digital speech synthesizer circuits incepted in **1980**.
*   **Yamaha:**
    *   **YM2203:** A 6-channel FM soundchip.
    *   **YM2149:** A related sound chip.
*   **Ricoh:**
    *   **2A03:** An 8-bit microprocessor and sound chip.
*   **Konami:**
    *   **SCC:** A sound chip developed by Konami with Yamaha Corporation for the MSX.
    *   **Konami Sound Cartridge:** An associated hardware class.
*   **Other Manufacturers:**
    *   **MOS Technology SID:** A prominent sound chip.
    *   **MSM5232:** A sound chip by Oki Electric Industry.
    *   **Votrax SC-01:** A related speech synthesis IC.

### Data and Identifiers
*   **Common Alias:** PSG
*   **Wikipedia Title:** Programmable sound generator
*   **Commons Category:** Programmable Sound Generators (PSG)
*   **Available Languages:** Arabic, Commons, English, French, Italian, Japanese, Korean, Dutch.

## References

1. Freebase Data Dumps. 2013