---
title: "Sound for the ZX81"
type: "article"
slug: "sound-for-the-zx81"
url: "http://localhost/article/sound-for-the-zx81/"
markdown_url: "http://localhost/article/sound-for-the-zx81.md"
published_at: "2026-03-12T23:48:22+00:00"
modified_at: "2026-03-12T23:48:23+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "A hardware project adding an AY-3-8912 sound chip and joystick port to the ZX81/TS1000 via the expansion bus. Includes BASIC and machine code driver routines (PLAY, MUSIC, SOUND commands via SHREB), schematics, PCB layout, parts list, hex loader, and demo program listing."
category:
  - name: "Sinc-Link"
    slug: "sinc-link"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/sinc-link/"
post_tag:
  - name: "AY-3-8910"
    slug: "ay-3-8910"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ay-3-8910/"
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Rene Bruneau"
    slug: "rene-bruneau"
    taxonomy: "indiv"
    url: "http://localhost/indiv/rene-bruneau/"
genre:
  - name: "Sound"
    slug: "sound"
    taxonomy: "genre"
    url: "http://localhost/type/sound/"
publication_r:
  id: 10240
  title: "Sinc-Link"
  type: "periodical"
  url: "http://localhost/periodical/sinc-link/"
authors_r:
  - name: "Rene Bruneau"
    slug: "rene-bruneau"
    taxonomy: "indiv"
    url: "http://localhost/indiv/rene-bruneau/"
volume: "12"
issue: "4"
issues_articles:
  - id: 27880
    title: "Sinc-Link v12 n4"
    type: "issue"
    url: "http://localhost/issue/sinc-link-v12-n4/"
pages: "5"
pubdate: "July/August 1994"
archive_link: false
---

# Sound for the ZX81

A hardware project adding an AY-3-8912 sound chip and joystick port to the ZX81/TS1000 via the expansion bus. Includes BASIC and machine code driver routines (PLAY, MUSIC, SOUND commands via SHREB), schematics, PCB layout, parts list, hex loader, and demo program listing.