The M1 was equipped with the ai (advanced integrated) synthesis system that used PCM waveforms and digital effects processor. While many of the preset sounds were based on PCM sounds, they not only possessed the realness of those sounds but also a unique sounding character, which shows us how advanced the KORG voicing technology has always been. In the KORG Collection M1, the PCM data provides the library of the original M1. For the hardware, we analyzed the circuit diagrams of the original design, and completely replicated the circuitry in software down to the last detail. Engineers with an exhaustive knowledge of the M1 made careful adjustments in order to obtain the sound of the original instrument, something that cannot be obtained simply by sampling the original sounds. We’ve also designed the iM1 so that programs and combinations are entirely independent – a capability not possible on the original unit.