The Casio CT-X5000 showcases the new AiX Sound Source developed from Casios work developing their impressive of digital pianos. Using the AiX technology sounds are produced to a high standard with deep bass notes through to crystal clear high notes. Sounds are reproduced from acoustic instruments with delicate treatment of the notes resonance. The Digital Signal Processor (DSP) employs numerous algorithms to suit the expressiveness of the performer. Powerful sounds are produced from the two 15W speakers whether at home or at a performance venue. The red detailing on the speaker certainly makes this keyboard stand out.