Features
Sirius Looper isn't a feature list bolted onto a recorder. Each capability below emerges from the same underlying decision: that musical time is a concept, not a number, until the very last moment.
01 · Signature
The tape runs from the moment the session opens. Mark In stamps a start at the playhead; Mark Out closes the region and auto-promotes it into the song. The in-point can then move backward to catch the pickup note you didn't have time to mark. The idea, not the reflex, drives the capture.
02
A Phrase is a complete musical utterance — a verse, a chorus, a fill. Loops are mechanisms inside phrases, not the unit of thought. A single phrase may contain multiple loops in different time domains, one-shot content, or silence — whatever the music actually demands.
03
A 4/4 drum loop and a 7/8 ostinato coexist inside a single phrase without approximation. Each carries its own meter; they only need to agree at phrase boundaries. Polyrhythms, cross-meters, and unequal cycles are not edge cases — they are first-class citizens of the data model.
04
Swing, pocket, deliberate drag — all captured at the substrate's full precision. Sirius never quantizes a performance to a grid. The instant quantization touches a performance, the feel dies; the architecture exists to make that impossible.
05
Every attempt, every edit, every rejected idea is preserved on tape. Destructive cleanup is available later, but nothing captured during the session is thrown away in the moment. The take you wished you had kept is still there.
06
A phrase declares its role — verse, chorus, bridge — and at performance time, the same slot can be filled by different phrases of the same role. Structured improvisation inside a fixed arrangement, without rebuilding the song every night.
07
Sets → Songs → Sections → Phrases → Loops. The same data model at every level. Arrangement happens at the phrase level and above; the levels nest cleanly because they share a single set of operations.
08
Sirius is a standalone host for third-party effects in VST3, AU, and CLAP formats. Plugins live downstream of the Logical Master Clock, in per-phrase effect chains. Mixing and mastering remain downstream in a DAW; Sirius handles arrangement, which is a creative act, not a processing one.
Each capability above is a consequence, not a checkbox. Read why the system is built this way.
Read the architecture →