The AdLib card was usurped in 1989 by Creative's Sound Blaster, which used the same Yamaha FM chip in the AdLib, for compatibility, but also added 8-bit 22.05 kHz (later 44.1 kHz) digital audio recording and playback of a single stereo channel. As an affordable end-user product, the Sound Blaster constituted the core sound technology of the early 1990s; a combination of a simple FM engine that supported MIDI, and a DAC engine of one or more streams. Only a minority of developers ever used Amiga-style tracker formats in commercial PC games, ("Unreal") typically preferring to use the MT-32 or AdLib/SB-compatible devices. As general purpose PCs using x86 became more ubiquitous than the other PC platforms, developers drew their focus towards that platform.