Complex sentence: The term "rompler" is a portmanteau of the terms "ROM" and "sampler", and as with samplers, a rompler can have additional sound editing features, such as layering of several waveforms and modulation with ADSR envelopes and LFOs.
Split into simpler sentences: The term "rompler" is a portmanteau of the terms "ROM" and "sampler". Both may have additional sound editing features, such as layering several waveforms and modulation with ADSR envelopes and LFOs.