CTR2 2026 Product Line
2025 in Review I’m the first to admit that CTR2 products have gotten confusing over the years. At the first of 2025, I introduced CTR2-Dial, a MIDI controller based on…
CTR2-Quad Hardware Manual – v1.00
M5Dial based CTR2 hardware is available in three different configurations. All three variations run the CTR2-Flex firmware that provides Bluetooth/USB MIDI control for third-party apps like SmartSDR for iOS, SDR-Control,…
CTR2-Duo Hardware Manual – v1.00
M5Dial based CTR2 hardware is available in three different configurations. All three variations run the CTR2-Flex firmware that provides Bluetooth/USB MIDI control for third-party apps like SmartSDR for iOS, SDR-Control,…
CTR2-Uno Hardware Manual – v1.00
M5Dial based CTR2 hardware is available in three different configurations. All three variations run the CTR2-Flex firmware that provides Bluetooth/USB MIDI control for third-party apps like SmartSDR for iOS, SDR-Control,…
Download the Latest Updates – January 1, 2026
Find the latest CTR2 firmware updates here
CTR2-Quad
CTR2-Quad is the latest addition to the CTR2 product line. It is a four-knob controller based on the M5Dial from M5Stack. It shares the firmware and hardware concepts from its…
CTR2-Duo
CTR2-Duo is a two-knob controller based on the M5Dial from M5Stack. It was originally branded CTR2-Flex and optioned with two knobs. To minimize confusion, the two-knob CTR2-Flex was rebranded as…
CTR2-Uno
CTR2-Uno is a single knob controller based on the M5Dial from M5Stack. It was originally branded CTR2-Flex. To minimize confusion, the single-knob CTR2-Flex was rebranded as CTR2-Uno to differentiate it…
CTR2-Flex – Now CTR2-Uno and CTR2-Duo
January 1, 2026 Update To simplify the CTR2 product line, CTR2-Flex hardware is being rebranded. The one and two knob hardware is exactly the same as before, but with new…
CTR2-Dial – To Be Discontinued
January 1, 2026 Update In order to simplify the CTR2 product line and eliminate confusion, CTR2-Dial hardware is scheduled to be discontinued once the current inventory of parts runs out.…