Linear arithmetic synthesis

Tones could be modified using up to three low-frequency oscillators, a pitch envelope, a programmable equalizer, and on-board effects such as reverberation and chorus.

Yamaha's SY77, its rack-mount equivalent TG77, and successor SY99 introduced Advanced Wave Memory 2 (AWM2), enabling playback and digital filtering of samples.

This, like LA, enabled more realistic modeling of physical instruments, and in combination with FM, new possibilities for synthesis.

This was until the Montage in 2016, which combines a later version of AWM2 with FM-X (an offshoot of the FM engine from FS1R, without the latter's Formant Synthesis) - though without letting samples be used as modulators, as the 77/99 series did.

Casio has also developed a similar synthesis system known as Advanced and High Quality Large Waveform, better known as AHL, for use on their portable keyboard line.

Korg's Modwave engine was designed to do both the morphing wavetable and sample synthesis, along with the usage of MS-20 filters due to its slope, which makes it closer to Roland's D-50 / D-550 / D-05 LA synthesizers.