Ad Lib, Inc. was a Canadian manufacturer of sound cards and other computer equipment founded by Martin Prevel, a former professor of music and vice-dean of the music department at the Université Laval. The company's best known product, the AdLib Music Synthesizer Card (ALMSC), or simply the AdLib as it was called, was the first add-on sound card (on compatibles) to achieve widespread game-developer acceptance, becoming the first de facto standard for audio reproduction.

The AdLib used Yamaha's YM3812 sound chip which produces sound via FM synthesis. The AdLib card consisted of a YM3812 chip with off-the-shelf external glue logic to plug into a standard PC-compatible ISA 8-bit slot.

PC software generated multitimbral music and sound effects through the AdLib card, although the acoustic quality was distinctly synthesized. Digital audio (PCM) was not supported, a key feature supported by later competition (such as the Creative Labs Sound Blaster.)

The engineers who developed sound cards and software libraries for Ad Lib worked at Lyrtech.

It was the first add-on sound card (on compatibles ) to achieve widespread game-developer acceptance, becoming the first de facto  standard for audio-reproduction. PC software generated multitimbral  music and sound effects through the AdLib card, although the acoustic quality was distinctly synthesized. Digital audio (PCM ) was not supported, a key feature supported by later competition (such as the Creative Labs Sound Blaster.)

Our card is version 1.5 and is in pristine condition compete with original packaging, software and manual: User Guide Referend ISBN 2920858033. It is a 34 page illustrated manual.

The identifying codes on the main sound chip (which is a Yamaha YM3812) have been sanded out, as was a somewhat common practice to avoid others simply copying their card. They were not obscured in later versions as by then the chips used had become more commonly known.