From the original speaker-targeted QSound 3D process used in producer-side applications, QSound Labs developed a suite of positional and enhancement spatial audio technologies, including positional audio for stereo speakers, multi-channel speaker systems and stereo earphones; stereo expansion, and virtual surround, under several technology names. There is no longer any single process now referred to as "QSound."
Although the hardware QSystem(TM) professional mixing processors and plug-in producer-side software tools were significant product offerings in the 1990s, most QSound technology is now incorporated in end-user products (such as video game software, computer sound cards and home entertainment electronics) by means of analog integrated circuits, digital signal processor (DSP) software libraries, host processor software and the like. QSound's iQ(TM) software internet audio enhancement software, their first downloadable, stand-alone consumer product, ultimately spawned a successful product line including the iQFX(TM) series of plug-ins for RealNetwork's RealPlayer.
In addition to spatial audio processing, the company has broadened its product line to include a long list of audio effects and controls such as static equalization, adaptive spectral enhancement, dynamic range controls, reverberation, and many other standard audio effects.
In 2003, QSound added a software MIDI wavetable ringtone synthesizer to its line-up. The effects suite and synthesizer are licensed in the form of software libraries to mobile phone manufacturers and providers of related technology (e.g. DSP's and DSP operating systems), in order to provide polyphonic ringtone rendering and enhanced music or mobile TV playback on hand-held devices.