It's a String Machine and a Synthesizer and a Bass Synth...

Or it can be the three of them at the same time, which is why it was advertised originally as 'The Analog Orchestra'

Recently a Vintage Analog Human Choir Machine was added (as an alternative oscillator source for the Synthesiser module) and it is also was used to augment the presets of the vintage String Machine model.

The X-505 offers all the layering and tweaking possibilities of its glorious predecessor, including the control of the finely tuned balance between the Strings registers, and for precise balancing of all the inputs of the quadruple (yes four module) BBD Chorus unit.

Many additional parameters are now available, ready to be tweaked, in the user friendly X-505 control panels allowing you to construct an even wider sound palette. A juicy sounding analog Phaser and a vintage Reverb round out this awesome package.