Comments on: My PC speaker PWM story

By: Galas Thierry

Galas Thierry — Fri, 27 May 2022 10:21:32 +0000

For the history: I created a crude blocking procedure to play PCM sound using pulse width modulation on PC at the end of 1988, no interruption, manual adjustment of sampling frequency. I was preparing Phd in LAFORIA a Paris 6 university lab. The piece of software was distributed to master students to allow then to try speech synthesis. Some months later , a russian student, part time hacker demonstrates me a russian game playing some russian music … maybe the start of story …

By: Tomi Engdahl

Tomi Engdahl — Mon, 21 Jun 2021 20:42:10 +0000

Every year in the month of June, someone by the unlikely name of posts a question to the Linux Kernel Mailing List asking whether a Linux kernel module is possible that would blow the PC speaker. It’s fairly obviously a joke, which is why the UK-based anti-virus company Sophos have devoted a light-hearted blog post to it. The post is an interesting diversion into early PC sounds, when the only hardware guaranteed to be present was a small speaker hooked up to a bit on an output port….

https://hackaday.com/2021/06/21/rf-burns-and-exploding-pc-speakers-sophos-looks-at-the-evidence/

By: Tomi Engdahl

Tomi Engdahl — Fri, 05 Jun 2020 08:17:02 +0000

How Did They Get Sampled Sounds From An SN76849 8-bit Sound Chip?
https://hackaday.com/2020/06/05/how-did-they-get-sampled-sounds-from-an-sn76849-8-bit-sound-chip/
So, how can a set of audio tone generators be turned into a sampled audio player, and how can it be done when the CPU is a relatively puny 6502?

Sampled sound 1980s style: from SN76489 square waves to samples
https://scarybeastsecurity.blogspot.com/2020/06/sampled-sound-1980s-style-from-sn76489.html