Single power supply can operate from 2.4V to 6.4V (in this range, user can set Rosc as a fixed value). The total voice duration is about 3.5, 7, 14 or 21 seconds those can be partitioned up to 8 voice_sections.Each voice_section length is flexible. Voice length can be individually up to 3.5, 7, 14 or 21 seconds at 6kHz S.R. for each voice_section.Voice+mute length can be individually up to 11, 21, 21 or 21 seconds at 6kHz sample rate for each voice_section. Total 16 voice_steps are available for 2 sub_tables. Each sub_table can only use maximum 8voice_steps. For each voice_step, it can specify one voice_section and IO1 output enable options if IO1is set as an output. Build in oscillator, 15 kinds of playback speed option for internal resistor used : ( 4.0k ~ 18.1kHz)