Addictive Keys: Mark One is the electric piano instrument in XLN Audio's Addictive Keys range, and "Mark One" is a direct reference to the Fender Rhodes Mark I — the tine-based electric piano whose bell-like attack, warm sustain, and characteristic bark when played hard defined jazz fusion, 1970s soul, and a large share of subsequent pop and R&B. Two physical details drive the instrument's sound and are worth explaining: a struck metal tine produces a fundamental with a strong inharmonic overtone — the "bell" that gives the Rhodes its brightness — and a passive pickup converts the tine's vibration into signal, so pickup position determines how much of that high content is captured, which is why a Rhodes can be voiced from dark and round to bright and cutting without any electronic processing. Its place in the range is documented: the four Addictive Keys instruments are Studio Grand, Modern Upright, Mark One, and Electric Grand, and Addictive Keys: Complete Collection pairs all 4 pianos at $249 list. The Electric Grand sibling covers the CP-70/CP-80 territory — a real grand piano action with electronic pickups, brighter and more percussive than a Rhodes — so the two electric instruments in the range are not redundant, and a buyer wanting electric piano should choose between the tine character of Mark One and the string-based character of Electric Grand. Requirements are macOS 10.13 or later (64-bit) or Windows 10 and 11 (64-bit) with an internet connection during installation, in VST, AU, AAX (64-bit) plus a standalone application on Windows and macOS, and the product should run on any host supporting 64-bit VST, VST3, AU, or AAX plugins. XLN Audio actively tests on Ableton Live 10 or later, Apple Logic Pro 10 or later, Avid Pro Tools 11 or later, Cakewalk by Bandlab, FL Studio 20 or later, Reason Studios 9.5 or later, Reaper 5 or later, and Steinberg Cubase 10 or later. It suits jazz, fusion, soul, R&B, funk, pop, and hip hop production — and note that AIR's Electric and Velvet 2 and Rhodes' Anthology cover the same territory from other developers, so the catalogue's differentiation should rest on the Addictive Keys engine's multi-perspective sampling and lightweight footprint rather than on the instrument itself. #AddictiveKeysMarkOne #MarkOne #AddictiveKeys #XLNAudio #ElectricPiano #Rhodes #FenderRhodes #MarkI #Tine #Pickup #CompleteCollection #StudioGrand #ModernUpright #ElectricGrand #Jazz #Fusion #Soul #RandB #Funk #Pop #HipHop #MusicProduction #VST #AU #AAX #Standalone #FLStudio #AbletonLive #LogicPro #Cubase #StudioOne