Editing Sound card (section)

===Industry adoption===
[[File:Three-isa-audio-cards.jpg|thumb|Three early ISA (16-bit) PC sound cards showing the progression toward integrated chipsets]]

When game company [[Sierra On-Line]] opted to support add-on music hardware in addition to built-in hardware such as the [[PC speaker]] and built-in sound capabilities of the [[IBM PCjr]] and [[Tandy 1000]], what could be done with sound and music on the IBM PC changed dramatically. Two of the companies Sierra partnered with were Roland and AdLib, opting to produce in-game music for [[King's Quest|King's Quest 4]] that supported the MT-32 and AdLib Music Synthesizer. The MT-32 had superior output quality, due in part to its method of sound synthesis as well as built-in reverb. Since it was the most sophisticated synthesizer they supported, Sierra chose to use most of the MT-32's custom features and unconventional instrument patches, producing background sound effects (e.g., chirping birds, clopping horse hooves, etc.) before the Sound Blaster brought digital audio playback to the PC. Many game companies also supported the MT-32, but supported the Adlib card as an alternative because of the latter's higher market base. The adoption of the MT-32 led the way for the creation of the [[MPU-401]], [[Roland Sound Canvas]] and [[General MIDI]] standards as the most common means of playing in-game music until the mid-1990s.