Audio direct digital synthesis
InRoland's D50 synthesizer was released, which combined the already existing sample-based synthesis [note 3] and the onboard audio direct effects while Korg 's even more popular M1 now also heralded the era of the workstation synthesis, based on ROM sample sounds for composing and sequencing whole songs, rather than solely traditional sound synthesis.
The first soundcard solutions were mono. Many Dissertation references page PCI bus cards do not have these limitations and are mostly full-duplex.
Later the group created a solid-state version, the "Synket". In that respect, their role and intended purpose is more similar to a specialized multi-channel data recorder and real-time audio mixer and processor, roles which are possible only to a limited degree with typical consumer soundcards.
A USB audio interface may also describe a device allowing a computer which has a sound-card, yet lacks a standard audio socket, to be connected to an external device which requires such a socket, via its USB socket. There are programs which allow a sound card to be used as an audio-frequency oscilloscope.
Many device manufacturers supply the drivers on their own discs or to Microsoft for inclusion on Windows installation disc. This encouraged a synthesis sentences digital producing music using digital sounds, [note 2] and laid the foundations for the development of the inexpensive digital instruments popular in the next decade see below. Professional soundcards are usually described as "audio thesis of international relations, and sometimes have the form of external rack-mountable units using USBFireWireor an optical interface, to offer sufficient data rates.
The emphasis in these products is, in general, on multiple input and output connectors, direct hardware support for multiple input and output sound channels, as well as higher sampling rates and fidelity as compared to the usual consumer soundcard. When Cardbus interfaces were superseded by Expresscard on computers since aboutmanufacturers followed. Some Roland cards, such as the SCC, and later versions of the MT were made to be less expensive, but their quality was usually drastically poorer than the other Roland cards.