If you've ever tried to open an Ableton .als file in Logic Pro, you already know: it doesn't work. Logic Pro has no support for Ableton's proprietary session format. Neither does any other DAW — the .als format is Ableton-only, end of story.
This matters because Ableton and Logic Pro users work together constantly. A producer writes and arranges in Ableton. A mixer or composer takes the project into Logic Pro for mixing, post-production, or orchestral scoring. The problem isn't that the music can't move between the two — WAV stems and MIDI data come across fine. The problem is the tempo map. Every tempo change, every time signature shift, every marker is locked inside the .als file with no way out.
Logic Pro handles tempo through a tempo track. To get your Ableton tempo map into Logic Pro, you need to feed Logic a MIDI file that carries the tempo data. Ableton doesn't make that file. There has never been a native path to generate it. That's the gap Unableton fills.
The real cost: A film composer or mixing engineer who receives an Ableton session with 40+ tempo changes will spend 2–4 hours manually entering every tempo value into Logic Pro's tempo track — if they're meticulous. Markers are lost entirely. And if the Ableton session gets revised, you start over.
When an engineer needs to get an Ableton tempo map into Logic Pro without Unableton, here's what they actually do:
This works in principle. In practice, it's tedious and error-prone, especially for sessions with complex tempo automation. And markers — the most time-consuming part — are always recreated from memory, which means names get wrong or lost entirely.
Unableton reads your .als file and outputs a Standard MIDI File with your complete tempo map — every tempo change, time signature, and locator — formatted for Logic Pro.
Upload your .als file — drag it onto the converter at unableton.polsia.app. No account, no signup.
Get the MIDI file — Unableton parses the session and builds a MIDI file with all tempo events, time signature changes, and locator names encoded at the correct positions.
Import into Logic Pro — Download the MIDI file, then in Logic Pro go to File > Import > MIDI File. The tempo map is applied to the Tempo track and markers land in the Markers track automatically.
What used to take 2–4 hours takes 30 seconds. And unlike the manual approach, every marker name comes through correctly.
Once you have the MIDI file from Unableton, here's exactly how to bring it into Logic Pro:
File > Import > MIDI File... (or press Shift + ⌘ + I on macOS).Free during beta. Runs locally in your browser — files never leave your device.
Drop your .als file here
or click to browse · runs locally in your browser
Parsing tempo map...
Need the full converter with DAW import instructions?
Open Full Converter →.als format is Ableton's proprietary binary session format. Logic Pro has no built-in support for reading it — no DAW does. The only way to move tempo data from Ableton to Logic is through an intermediate format that both can read, which means a Standard MIDI File with embedded tempo events..als file is processed locally; only the extracted tempo metadata is used to build the MIDI file. Works on macOS, Windows, and Linux.