The Yamaha SPX900 features 16-bit analog-to-digital and digital-to-analog conversion technology, with sampling at 44.1kHz. The mono input and a stereo output are unbalanced, with a level switch to select either -20 dB or +4 dB nominal level. In addition to the main effects, the SPX900 provides programmable pre and post effects that can be used to refine and polish your sound. Delay time parameters feature independently variable left, right and center channel delays.