Kelfar AK-2 Pro World Scale Tuner, works
I really don't know much about it, it's kind of above my pay grade as a guitar player. I know nothing about it, but I plugged it in and it all lights up, and it's in good physical condition, And I was told it works. Please write with any questions you may have.
Since I don't know that much about this, my answer is probably going to be. But you're welcome to ask anyway. Thanks very much for looking at this listing. Here's some details, copied from the internet. AK-2 Pro World Scale Tuning is a MIDI device that converts a wide range of synthesizers to a specific Scale Tuning.It can adjust the pitch of each note in the octave (C to B) to -64 to +63 cents. AK-2 Pro can be connected simultaneously to two synthesizers via the two MIDI_OUTS (Primary and Secondary).
AK-2 Pro works on most MIDI synthesizers i. Yamaha, Roland, Korg, Ketron, and Kurzweil. AK-2 Pro works on most Midi synthesizers that support Pitch Bend midi data Monophonic and Polyphonic (NEW FEATURE). Transpose buttons for Korg Triton series, Fantom x, Korg Pa series, Ketron, Yamaha, and Keyboards with GM/GM2/XG logo. Supported Instruments/Models (FIRMWARE VERSION 2.8). Korg Pa80, Pa50, Pa60, Pa55Tr, Pa1&2x (Pro), Pa800, Pa3x series, Pa500, P500 ORT, Pa600, Pa600QT, Triton Classic, Karma, Studio, Extreme, Le, Tr, Micro X, X50, Kronos series (with firmware 2.3 and up), M3 series, Oasys, Trinity, Korg Z1, and Korg Prophecy. Trinity series works in all modes, except the MOSS mode. Roland Fantom S, X, G, AX-Synth Shoulder Synthesizer (with firmware 2.6 and up), and models with GS logo. Yamaha Motif ES/ MO (preset scale only - Arabic 2) and instruments with XG logo, Tyros/Psr series, Motif XS (Voice, Song, Pattern), and Motif XF (Voice, Song, Pattern), GENOS. Ketron VEGA, SD5, SD1, and AUDYA series. Kontakt with a provided script - Kontakt Script (Native Instruments). Kurzweil K2600 and K2000 series.MOOG Sub Phatty and Sub 37 (AK-2 FIRMWARE 2.7 and up). World Scales Support (-64 cents to +64 cents). Turkish (Byselik, Rast, Ussak, Nikirz, Saba, Huazm, Siga, and more).
Byzantine (Modes 1,2,3,4,5,6,7, and 8). Arabic (Bayati, Rast, Siga, Huseini, Hijaz, amd more). Display Screen - 2 digits. Transpose buttons "Coarse Tune/General Midi 2/Yamaha XG/Roland GS/Ketron" per instrument. Recall the preprogrammed User Scales in realtime. Standard mode - sending System Exclusive Messages. Universal mode - 4 different ways to detune an instrument i. One Midi_In (Enabled for the Universal mode). Supports Korg, Roland, Ketron, Yamaha, Kurzweil, Ayoub Module, Kontak 2/3. User Scales are adjustable -64/ +64 cents. Firmware updates for future upgrades. GUI Interface to program your own User Scales and performing firmware updates. Dimensions 5.8 x 3.2 x 1.8 in / 14.7 cm x 8.1 cm x 4.6 cm (metric). AK-2 Pro Setup Guide (PDF). AK-2 Graphic Interface for Windows (NEW) (zip). Latest firmware version 3.2 AK2_MAIN_032. Korg M3 EXPANDED converted set to work with AK-2 Pro. Korg M3 Guide - MAKE your set/sound to work with AK-2 Pro. Roland Fantom G Guide - MAKE your set/sound to work with AK-2 Pro.