WE READ EVERY MAIL

Write to td3-studio@50hz-services.nl. It helps to include the app version (Credits, or the setup menu), your platform, and what you did just before it went wrong. We answer within two working days.

Before you write

Check the install guide, the guides, or the FAQ — most questions about setup, MIDI files and the TD-3 are answered there. Release notes for every version are on GitHub.

On the iPad and iPhone

Patterns and MIDI files live in the Files app, under “TD3 Studio”. A MIDI file opens straight into the app from Files with Share › TD3 Studio. The app is on the App Store; purchases, refunds and updates go through Apple.

Connecting the TD-3 over USB-C (iPhone, recent iPads): the cable has to make the device the USB host. Surest is Apple’s USB-C to USB Adapter with the TD-3’s own USB-A to USB-B cable; a direct USB-C to USB-B cable works only if it follows the USB-C standard — a branded USB 2.0 data cable sold as a USB-C printer cable, whose C plug carries the 5.1 kΩ resistor on the CC pin that tells the phone it is the host. Cheap cables omit it and then work on a PC but not on a phone; a USB-C to USB-A plug-to-plug cable can never work. A Lightning iPad has no USB port of its own — use an MFi Lightning to USB-B MIDI cable (the kind sold for keyboards) or Apple’s Lightning to USB Camera Adapter; the plain USB 2 one is enough. A charging cable does not work. The TD-3 runs on its own power, so the phone powers nothing. Plug in with the device unlocked, allow the accessory if iOS asks, then rescan next to OUTPUT. A Bluetooth MIDI adapter on the TD-3’s MIDI IN pairs from Bluetooth MIDI… in the OUTPUT menu. The TD-3 then appears in the OUTPUT list; the rescan key next to it finds it again after a replug.

Reporting a bug

On every platform, use Report an issue under the setup key: it sends the report straight to us with the app version and platform included, no account needed. If a MIDI file converts wrongly, please mail it to us as well.