Pro Tools · Reaper · Cubase · Nuendo.
Any session, any direction.
Interchanger moves full sessions between Avid Pro Tools (.ptx), Cockos Reaper (.rpp), Steinberg Cubase (.cpr) and Nuendo (.npr) — any format to any other. Audio, MIDI, video, surround panning, automation, routing and musical (tick-based) tempo all travel together. No Wine. No DAW license required. The input format is auto-detected; a Convert to selector picks the target.
$99.99 one-time — limited-time price. It goes up when plug-in conversion ships (almost ready). No subscription. Two Reaper extensions bundled in the DMG. User Guide (PDF) · Changelog
The standalone app converts across Pro Tools, Reaper, Cubase and Nuendo — Preflight, Output mode tabs, Track Data filter. The two bundled Reaper extensions (shortcut Option+Shift+I) — "Spot to & from Pro Tools" spots clips between running Reaper and Pro Tools sessions at timecode, both directions. Click any image to enlarge.
Two Reaper Extensions Included
The standalone app does the whole conversion on its own. The direct DMG also bundles two optional, independent extensions that live inside Reaper — install whichever fits your workflow, or both. (The Mac App Store build is sandboxed and includes neither.)
Import PTX into Reaper
Open a .ptx straight into Reaper — skip the “export an .rpp from the app, then File → Open” round-trip. Same conversion engine as the standalone app, brought right into your Reaper session.
- Full UI parity — the same Preflight and Output-mode tabs (Link to source / Copy Media) you get in the standalone app, in a dialog inside Reaper.
- Choose exactly what comes in — the Track Data filter (the funnel) toggles automation, playlists, markers, clip gain, colours and more on or off; by default everything is imported.
- Relink built in — if any audio or video moved or is missing, the Preflight’s Relink dialog points it at the right files before import (Match by Name / File-ID / Duration, multi-folder search). The source
.ptxis never modified. - Adds an action — “Import PTX Session Data…” — to Reaper’s Action list: run it once, bind a keystroke (default Option+Shift+I), or add it to the File / Extensions menu yourself.
- The imported session lands in the current Reaper project, ready to play — tracks, routing, automation and media in place.
New · Beta
Spot to & from Pro Tools
Spot the clips you selected straight into the other running DAW — both ways, Reaper → Pro Tools and Pro Tools → Reaper. Both apps open, no export, no file dialog. Clips arrive carrying their clip gain, volume / pan / surround-panner automation and fades; the destination routing stays untouched.
- Bakes item FX for you — item / take FX, playrate, pitch-shift, stretch and reverse are rendered into the audio before the spot (non-destructive, undoable). Unique to Spot.
- Spot by track name or free placement; create missing destination tracks automatically.
- Land clips at the destination cursor or at their own source timecode to mirror a session.
- Link or copy media; overlay or replace what’s already on the track.
- Live preflight before you commit, and an optional live cursor link between the two apps.
- Default shortcut: the
`key. Requires macOS 15 Sequoia.
How It Works
1
Open
Click Browse and pick a .ptx, .rpp, .cpr or .npr file. The input format is auto-detected — no Pro Tools, Reaper, Cubase or Nuendo installation required. Then pick the target with Convert to.
2
Preflight
Review session stats, format incompatibilities and missing audio. Re-link files in place before converting.
3
Convert
Click Convert. Open the resulting session in the target DAW — tracks, routing, automation and media land where they should.
What Converts — Full Feature Matrix
Any of the four formats converts to any other: Pro Tools ↔ Reaper ↔ Cubase ↔ Nuendo. Tracks, clips, surround panning, automation, routing, MIDI, video and tempo translate without manual cleanup. Hover the i on any row for the implementation detail behind it.
RW read & write
W write target only
R read source only
— not carried
⚠ carried with a documented limit — hover the row
Session & timeline
| Feature | Pro Tools | Reaper | Cubase | Nuendo |
|---|---|---|---|---|
| Session sample rate / bit depthiSession sample rate drives media resampling on every write path. | RW | RW | RW | RW |
| Frame rateiMapped between each DAW's rate tables. | RW | RW | RW | RW |
| Session start timecodeiPT 0x204D ↔ Reaper PROJOFFS ↔ Cubase/Nuendo Project Start Time (byte-verified against genuine saves). NTSC pull-down rates (23.976 / 29.97 / drop / 59.94) store timecode ×1.001 — Interchanger applies the same law both ways, so positions match frame-exactly. | RW | RW | RW | RW |
| Tempo map (multi-point)iFull map, not just the first tempo; ramp/linear points preserved where the target supports them. | RW | RW | RW | RW |
| Time signaturesiBar-anchored meter changes. | RW | RW | RW | RW |
| MarkersiNames everywhere; colours PT ↔ Reaper; PT Memory Locations cap at 999. | RW | RW | RW | RW |
| Video track + clipsiOne video track in Cubase/Nuendo (extras reported and skipped); offline video keeps its declared path. Video links by absolute path (their pool convention); Standalone + “Copy video files” copies into the bundle. | RW | RW | W | W |
Tracks & mixer
| Feature | Pro Tools | Reaper | Cubase | Nuendo |
|---|---|---|---|---|
| Audio tracks + formatsiUp to 7.1.2 and Atmos beds. Both targets get genuine 7.1 / 7.0.2 / 7.1.2 bus + panner chains; Cubase 10/11 display height formats as 5.1 (data preserved, native from Cubase Pro 12; Nuendo throughout). | RW | RW | RW⚠ | RW |
| Summing groupsiCubase Group Channels ↔ PT Routing Folders / summing Auxes ↔ Reaper folder buses. Group width taken from the source bus format; routing follows. | RW | RW | RW | RW |
| FX-return tracksiSend-fed buses are detected as FX returns; written as Groups until the FX-channel template lands (warned); Cubase FX Channels read back as summing groups. Width = the PT aux's output bus. | RW | RW | RW⚠ | RW⚠ |
| Output buses (surround & hardware)iCreated in Audio Connections with correct widths, main mix selected; ports arrive Not Connected (device names are machine-local). | RW | RW | RW | RW |
| Track sendsiLevel / pan / pre-post / on-off; PT slots A–J, Cubase/Nuendo 8 slots. Wider-than-destination sends dropped with a warning (no downmixer template). Reaper track-to-track sends (AUXRECV) don't read back to PT yet. | RW | W⚠ | RW | RW |
| Master fader leveliReaper master (incl. automation to PT) → Cubase/Nuendo Output channel level (level only, no automation). | RW | RW | W⚠ | W⚠ |
| Track solo / notesiNotepad ↔ track notes. | RW | RW | RW | RW |
| Track mute / colouriTrack colour now maps through the project's Event Colors palette (nearest slot on write, the project's own palette on read); PT ↔ Reaper stay full 24-bit RGB. Still pending on the Cubase/Nuendo side: static track mute (automated mute transfers) and MIDI-track colour on write — both next build. | RW | RW | RW⚠ | RW⚠ |
| Inactive / disabled tracksiCubase/Nuendo disabled tracks supported. Reaper has no “inactive” — arrives muted; optional skip toggles. | RW | ⚠ | RW | RW |
| Hidden tracks | RW | RW | RW | RW |
| Folder (visual-only) tracksiPT basic folders and Cubase/Nuendo folder tracks are on the roadmap; summing structures already convert as Groups. | ⚠ | RW | —⚠ | —⚠ |
| Plug-ins + plug-in automationiNot transferred in 1.7.8 (engine exists behind a flag; next release line). ReaSurroundPan is interpreted as a panner, not carried as a plug-in. | — | — | — | — |
Clips & fades
| Feature | Pro Tools | Reaper | Cubase | Nuendo |
|---|---|---|---|---|
| Clip position / length / source offsetiSingle-pass template-splicing writer on the Cubase side, byte-calibrated against genuine saves. | RW | RW | RW | RW |
| Clip gain: static | RW | RW | RW | RW |
| Clip gain: envelopes | RW | RW | RW | RW |
| Clip mute / names | RW | RW | RW | RW |
| Clip coloursiFull 24-bit RGB between PT and Reaper; Cubase/Nuendo map through the Event Colors palette (nearest of 16 on write, the project's own palette — including customised ones — on read). | RW | RW | RW⚠ | RW⚠ |
| Fade in / out + shapesiPT ±2 shape scale ↔ Reaper f6 ↔ Cubase presets 1–8, empirically calibrated. | RW | RW | RW | RW |
| Crossfades + shapes + midpointiSame-file and cross-file crossfades (the cross-file nested form was reverse-engineered from genuine saves); written into inactive Track Versions too. | RW | RW | RW | RW |
| Loop-source clipsiReaper loop-source items arrive as their first pass on the Cubase path (loop expansion planned). | RW | RW | —⚠ | —⚠ |
| Playlists / takes / lanes / VersionsiFull triangle: active version = playing content; audio and MIDI; fades and gain on clips inside inactive Versions included. | RW | RW | RW | RW |
Automation & panning
| Feature | Pro Tools | Reaper | Cubase | Nuendo |
|---|---|---|---|---|
| Volume / pan / mute lanesiStereo pan is never written onto a surround-format Cubase track (engine-refused slot). | RW | RW | RW | RW |
| Surround panner: positionsiIndependent L/R channel dots convert through MultiPanner's linked-parameter geometry (midpoint + rotation + width, quadratic knob law) — calibrated byte-exact against hand-made references; read back out to ReaSurroundPan / the PT panner. | RW | RW | RW | RW |
| Surround: divergencesiPT Divergence is the opposite scale to MultiPanner's (manual-verified) → inverted; PT Size (7.1.2) maps directly and also drives the Height Divergence. Defaults coincide, so untouched panners stay untouched. | RW | RW | RW | RW |
| Surround: Center % / LFEiLFE in true dB. | RW | RW | RW | RW |
| Height (Z)iCubase 10/11 display height formats as 5.1 (data preserved; native from Cubase Pro 12). | RW | RW | RW⚠ | RW |
| Panner automationiMoving independent dots become synchronised x / y / rotation / width lanes — and read back as moving ReaSurroundPan / PT lanes. | RW | RW | RW | RW |
MIDI
| Feature | Pro Tools | Reaper | Cubase | Nuendo |
|---|---|---|---|---|
| Notes / velocities / durations | RW | RW | RW | RW |
| CC / pitch bend / program change / aftertouch | RW | RW | RW | RW |
| SysExiCarried between .cpr/.npr today; PT/RPP SysEx transport is on the roadmap. | —⚠ | —⚠ | RW | RW |
| Per-track MIDI channeliPT has no per-track channel. | — | RW | RW | RW |
| Clip (part) mute | RW | RW | RW | RW |
| Shared / ghost partsiCubase shared copies preserved as aliases both ways; PT gets independent copies. | ⚠ | RW | RW | RW |
| MIDI playlists / lanes / VersionsiSame triangle as audio. | RW | RW | RW | RW |
| Instrument tracksiNote data transfers (a Cubase Instrument/Sampler track arrives as a PT Instrument / Reaper MIDI track); carrying the virtual instrument itself is on the roadmap (plug-in era, next release line). | RW⚠ | RW | RW⚠ | RW⚠ |
Media handling
| Media | How it converts |
|---|---|
| Split-mono .L/.R pairs | Merged to one interleaved WAV on every write path that needs it (PT keeps split-mono natively). |
| FLAC / OGG / MP3 / WavPack / M4A / AAC / AIFF sources | Decoded to WAV for targets that need it (PT, Cubase/Nuendo); Reaper plays them natively. |
| Sample-rate mismatches | Resampled to the session rate for PT and Cubase/Nuendo targets (Cubase plays mismatched pool files transposed). Reaper needs no resample. |
| Link vs Standalone | Link references media in place by absolute path (multi-folder / multi-disk supported); Standalone builds a self-contained bundle. Offline files keep their paths for relinking; a Relink dialog runs before conversion. |
| RF64 / >4 GB WAV | Supported. |
Containers & compatibility
| Format | How it converts |
|---|---|
| .ptx | Pro Tools sessions from the PT 10/11 era (~2014) through 2026 read (all four format generations); written sessions open in PT 2022.12+ (format-generation aware). |
| .rpp | Reaper 6 / 7. |
| .cpr / .npr — read | Classic RIFF and 64-bit RIF2 (the Cubase/Nuendo 13+ large-project container). |
| .cpr / .npr — write | Classic RIFF — verified opening in Cubase 10 and Nuendo 15. Projects that would exceed the RIFF ceiling (≈1.5 GB) are flagged in preflight. |
On the roadmap
- Plug-ins & plug-in automation — transfer in every direction (engine already exists behind a flag; next release line)
- Virtual instruments on Instrument tracks (MIDI already transfers)
- Visual-only folder tracks (PT ↔ Cubase/Nuendo); Cubase/Nuendo static track mute & MIDI-track colour on write; SysEx over PT/RPP
App & workflow
- One input, auto-detected; a Convert to selector picks the target of the other three formats
- Link to source or Copy Media (Standalone) output modes
- Preflight warnings before converting, re-evaluated when you switch target
- Native Relink dialog — Match by Name / File-ID / Duration, multi-folder search
- Two Reaper extensions in the DMG — Import PTX, and Spot to & from Pro Tools (Beta)
- 14,550 clips across 174 tracks convert in ~3.5 seconds
Built for Mac from Day One
Native macOS
No Wine, no CrossOver, no emulation layers. Universal binary — runs natively on Apple Silicon and Intel.
No DAW Required
Reads and writes each project format by parsing the binary directly. Works even if you have never installed Pro Tools, Reaper, Cubase or Nuendo.
Four Formats, One App
Drop in a .ptx, .rpp, .cpr or .npr; pick any of the other three as the target. Audio relinking, MIDI, video files and surround panning all come along.
Supported Formats
Pro Tools: .ptx — read from the PT 10/11 era through 2026 (all four format generations); written sessions open in Pro Tools 2022.12 and later.
Reaper: .rpp — Reaper 6 / 7 (read & write).
Cubase & Nuendo: .cpr / .npr — read classic RIFF and 64-bit RIF2 (Cubase/Nuendo 13+ large projects); written as classic RIFF, verified in Cubase 10 and Nuendo 15.
Audio: WAV, AIF, RF64 (>4 GB) native. FLAC / OGG / MP3 / WavPack / M4A / AAC / AIFF decoded to WAV when the target needs it.
Surround: mono … 7.1.2 and Atmos beds — static positions and full automation, across all four formats.
Video: .mov, .mp4, .avi, .mkv, .m4v, .mxf — linked by absolute path by default, optional full copy.
System requirements: macOS 14 Sonoma or later. Universal — Apple Silicon & Intel.
Frequently Asked Questions
No. Interchanger reads and writes each project format by parsing the binary directly — you don't need Pro Tools, Reaper, Cubase or Nuendo installed on the machine.
Yes. It reads any PTX file regardless of which Pro Tools tier created it.
Fully supported. Clip gain envelopes are converted to Reaper item volume envelopes with accurate breakpoint mapping.
Yes. Both are preserved in their correct signal flow positions. This is a key advantage over other conversion tools that force you to choose one or the other.
All of them. Pro Tools, Reaper, Cubase and Nuendo — any format converts to any other (Reaper ↔ Pro Tools since v1.5, Cubase & Nuendo added in v1.7.8). The input format is auto-detected; a Convert to selector picks the target. Audio, MIDI, video, surround panning, automation, routing and tempo come along.
Interchanger focuses on direct native-project conversion between Pro Tools, Reaper, Cubase and Nuendo for the highest possible fidelity. For AAF/OMF workflows from video editors, we recommend Vordio.
Yes. The free trial converts the first 2 minutes of your session so you can verify the results before purchasing.
Email [email protected] and please attach the .ptx or .rpp file (without audio files) so we can reproduce it. You can also use the in-app "Report a bug" link.
$99.99
Limited-time price. Going up when plug-in conversion ships (almost ready) — buy now and lock it in.
One-time purchase, no subscription. All four formats, every direction, all future updates included.