Later the e-Synth was introduced: a 128 voice fully expandable EOS sampler which could be expanded to 128 megabytes and had the effects board as standard. It also came with the e-Synth flash ROM, which unfortunately reduced the available sample memory to 64 megabytes. The user could disable the ROM if you needed the full 128. The ROM contained hundreds of pre-made sounds which could be edited like a synthesizer (the same editing features were on the E-IV, e64 and e6400 as well). A number of e-Synth ROMs were made available.