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Polarity-Recorder Plugin: Capture Ideas and Make Loops

Tutorial | Aug 28, 2026

Learn how Polarity-Recorder captures background audio in a DAW to recover ideas, snap loop exports to bars, and build searchable samples fast.

Quick Answer

Short Overview

Polarity-Recorder is a free cross-platform background audio recorder plugin for Windows, macOS, and Linux, available in CLAP, VST3, LV2, and standalone formats, plus AUv2 on macOS. It continuously captures incoming audio in a rolling buffer, making it easy to recover ideas, performances, and sound design accidents that would otherwise be lost.

In practice, it speeds up sampling and loop creation by combining transport-aware timing markers, bar snapping, quick waveform editing, and direct export. Features like normalization, fades, reverse, and seamless loop wrapping make it useful for extracting stems, one-shots, and loops directly from a DAW workflow without account requirements, telemetry, or extra bounce steps.

Key Takeaways

Polarity-Recorder: a free background audio ring recorder for Windows, macOS, and Linux

Polarity-Recorder is a free audio plug-in and standalone tool that continuously records audio in the background. It is available for Windows, macOS, and Linux, with CLAP, VST3, LV2, and standalone builds, plus AUv2 on macOS.

No account is required. The project is described as having no telemetry and no login.

At its core, Polarity-Recorder works as a ring recorder: it always keeps the most recent audio in memory for a defined period, then overwrites the oldest material as the buffer fills. That makes it useful for capturing musical ideas, accidental performances, loops, and sound design moments that were not explicitly recorded.

What It Does

Polarity-Recorder continuously captures incoming audio and stores the last portion of it in a rolling buffer. The default buffer length is two minutes, with selectable lengths of one, two, five, ten, or twenty minutes.

A two-minute setting is presented as a practical middle ground: long enough to recover recent ideas, short enough to stay focused.

Unlike many simple rolling recorders, the plug-in also tries to preserve a sense of musical timing. When used inside a DAW, it can display visual timing references tied to the host tempo and transport. These markers make it easier to find loop boundaries, transients, and phrase starts without relying only on the waveform shape.

How It Works

When inserted on a track or on the master bus, the plug-in immediately begins recording incoming audio in the background.

Inside the waveform display, several visual markers appear:

These markers are intended to solve a common problem in ring recorders: waveform displays alone often provide poor timing context. Here, the timing references help identify bars, beats, and loop boundaries more reliably.

Selections can snap to these timing positions, which is especially useful for extracting loops or one-shot samples that need clean musical alignment.

Editing and Extraction Workflow

Once a useful region has been found in the rolling recording, it can be selected and opened in a built-in editor.

The editor provides lightweight waveform editing for common tasks:

This is not presented as a full audio editor, but as a compact tool for the most common cleanup and preparation steps before export.

After editing, the audio can be:

File Naming and Searchable Metadata

The editor allows optional labeling of exports with descriptive information such as:

This metadata is not stored in embedded file metadata. Instead, it is written into the filename, making the exported files easy to search in the built-in browser or from the file system.

Because of that approach, searches can be simple text queries, including terms like BPM values or names.

History Browser

Saved exports appear in a browser panel on the right side of the interface. This functions as a lightweight sample history and library for recently exported material.

From there, files can be:

This makes it possible to build an ad hoc sample library while working, especially during sound design sessions or sketch-based production.

Practical Uses

Capturing missed performances

The most obvious use is recovering a good take, improvisation, or happy accident that was never formally recorded. Because the plug-in is always listening, the last few minutes remain available.

Extracting loops from the master bus

Placed on the master, Polarity-Recorder can capture complete musical ideas and quickly turn them into loops. The host-synced visual markers make it easier to cut exact bars or phrases.

Recording stems and one-shots

Placed on an individual track, the plug-in can be used to capture drums, snares, pads, or other isolated material. The timing lines make it easier to identify where a sound begins, even when the waveform itself is not visually obvious.

Building sample libraries during production

Instead of going through a traditional bounce-export-locate-reimport workflow, usable moments can be selected, lightly edited, saved, and dragged out immediately.

Loop Repair and Seamless Looping Tools

One of the more distinctive features is a pair of tools intended to fix loops that do not close cleanly.

A common example is a phrase that technically repeats, but whose tail contains reverb or delay that overlaps the start point. In such cases, the loop boundary clicks or feels abrupt.

Two operations are described for addressing this:

Rotate

This function takes a selected tail section from the end of the audio, moves it to the front, and crossfades it into the original beginning. The result is intended to create a smoother, seamless loop when the loop tail should lead into the start.

This is especially relevant for ambient material, pads, or any source with long decays.

Wrap

This function is similar in intent but behaves differently. Instead of offsetting the original beginning, it keeps the beginning in place and moves the excess tail material to the front while crossfading it into the start. This is useful when the total recording is slightly too long for an exact musical loop length, such as a phrase that should be 12 bars but runs over.

In that case, the overflow can be wrapped to the front so the result matches the intended bar count while remaining smooth at the seam.

DAW Integration Notes

The plug-in is shown working inside Bitwig and was also tested by the developer in Reaper and Ableton Live.

A limitation is noted around plug-in formats such as VST3 or CLAP: some DAW-side settings are not readable from the host in a way that would allow automatic filling of all descriptive fields. Ableton Live is mentioned as having related functionality, but not in a form that is currently accessible here.

The tool can also be used outside a DAW as a standalone application, though the host timing markers are most useful when running as a plug-in inside a DAW.

Why This Workflow Matters

The design addresses a common modern production pattern: experimenting with sound, instruments, and processing chains until something interesting happens, then wanting to keep just that fragment as reusable audio.

Traditional workflows often require multiple manual steps:

  1. bounce or record the part
  2. locate the exported file
  3. rename it
  4. import it back into the DAW
  5. edit it again if needed

Polarity-Recorder reduces that friction by combining background capture, timing-aware selection, lightweight editing, and direct export.

Limits and Compatibility Notes

A few limitations and caveats are mentioned:

Feedback and bug reports are explicitly requested, especially for larger compatibility issues or feature requests.

Summary

Polarity-Recorder is a free cross-platform ring recorder designed for music production and sound design. Its main strengths are:

For producers who frequently capture unexpected ideas, build sample libraries from live experimentation, or extract loops from ongoing sessions, it offers a faster alternative to manual bounce-and-reimport workflows.

Transcript

This is the transcript of the video. The text was generated automatically and may contain small mistakes. The timestamps jump to the matching part of the video.

Click to expand transcript

[00:00:00] Yo, welcome back today. I want to share with you a new plug-in called polarity recorder and it records audio
[00:00:06] Continuously in the background again. This plug-in is completely free to use available for all platforms windows mac and linux
[00:00:14] Also all kinds of formats a you
[00:00:17] clap vst3
[00:00:19] Lv2
[00:00:21] Standalone and so on again. You don't need an account. There's no telemetry. There is no
[00:00:29] Description or anything like this. No. I log completely free to use just head over here to this download section and download this for windows
[00:00:36] Mac also linux and
[00:00:38] Yeah, in this video, I want to show you what it is and how it works. So in bitwig here. I
[00:00:44] Have a track and I want to maybe use this plug-in. So I just load it in here as a clap
[00:00:50] Instrument and let us run
[00:00:56] You can see it just starts to record stuff in the background. So this is a ring recorder
[00:01:01] so
[00:01:02] When these two minutes are full it just deletes the oldest stuff and you know
[00:01:07] You never get lost of the last two minutes
[00:01:10] We can also change this here to five minutes ten minutes twenty minutes and so on what I think two minutes here is a
[00:01:16] Perfect middle ground
[00:01:20] So we can also see here some special features for instance most of these ring recorders
[00:01:26] my opinion have this problem that you
[00:01:29] have no sense of
[00:01:31] Timing so here you can see we have a green line here and some purple lines and some yellow lines
[00:01:39] And these kind of represent the positions inside of your project. We have here 85 bpm
[00:01:46] So the green line is basically where we hit play on the
[00:01:51] On the transport here, right? So when I hit play and I put this here exactly on this
[00:01:56] 33 marker play
[00:02:00] You can see we get now here some kind of green line inside of the recording and these
[00:02:06] Purple lines are basically one bar or two bars
[00:02:10] I'm not really sure at the moment and what you can do with this is you can just head over here to this green line and
[00:02:16] Just select this and say I want to have I don't know
[00:02:20] Two bars or one bar here. All right. These are quarter notes. You can see it also snaps to this position
[00:02:27] This was also pretty important to me because I always want to have some kind of loops
[00:02:33] Extracted and we have the timing here from the host, right? We have 85 bpm. So why not?
[00:02:39] Let me just snap to these bars or to these timing positions, right?
[00:02:45] so
[00:02:47] Because we have selected this here, you can see a preview down here, but it's actually
[00:02:51] Not in the editor. We can say edit selection
[00:02:55] So now we have this here in the editor and we can do some things with that. So first up we have here the bpm setting
[00:03:02] So we have also in here some markers where we can snap the selection to it so you can
[00:03:09] Do different things or edits to this waveform if you want to right?
[00:03:14] We can also give it here a name for instance
[00:03:17] Call it master and then we can select here
[00:03:21] Type I don't know what it is full mix probably and it's a loop right and we can also say here
[00:03:29] It's E flat or the sharp
[00:03:31] Minor and this is nothing here you need to do but you can do it and it's actually
[00:03:37] stored inside of the
[00:03:40] File name so you can always extract
[00:03:44] Important metadata from the wave file. So it's not like it's stored inside of the file. It's just stored in the file name
[00:03:52] Okay, what you can do now is you can just drag this out here and put it into
[00:03:58] Bitwig as a waveform or you can
[00:04:00] I don't know drag it here into a sampler for instance
[00:04:06] Doesn't matter what you want to do and also when you drag it out for the first time you can see it's stored here inside of the
[00:04:12] history so there's some kind of browser on the right side and
[00:04:15] Can hit play
[00:04:20] And you can listen to all things you just you know recently
[00:04:28] exported from the plug-in
[00:04:32] We can also do some different things here for instance
[00:04:36] Like I said, we can zoom in zoom out. We can also zoom in here if you want to do that
[00:04:41] So we can select everything we can say we want to peak normalize this right just hit peak here
[00:04:49] So it's normalized to minus zero dot three DB. We can use love loves
[00:04:55] Normalization we can also clip it
[00:04:58] They're awesome
[00:05:03] What's the name pop ups help menus here. So what it does we also have fade in so you can say here
[00:05:09] We want to fade this in right? We want to have a fade out here
[00:05:13] Something like that. You can also let this play and in a loop
[00:05:18] We can also do here some undo also possible we can say we want to
[00:05:31] Have here some silence
[00:05:33] Something like that
[00:05:35] Undo we can reverse this part so you can make some edits to these
[00:05:42] Extractions here from the ring recorder. So I have a small little wave editor for the most important parts or
[00:05:50] You know most important actions you want to do on a wave file
[00:05:53] You can do this here
[00:05:57] Then there are some special things here. I want to show you in a minute. So anyway, so you can drag this out here
[00:06:02] You can also just hit save and it's just
[00:06:05] moved here into this history and this is also just a
[00:06:10] Kind of a directory on your on your hard drive, right?
[00:06:15] You can refresh it here. You can search also for certain things
[00:06:22] You have to kick nothing in here, but you can search also here for BPM and
[00:06:27] 73 yeah, so it's just a
[00:06:32] normal
[00:06:34] Text search here for the names for the file names and because all the metadata is stored inside of the file name
[00:06:40] You can find anything
[00:06:43] So this is pretty cool here on the master
[00:06:46] But it's also very cool if you just want to record some single stems, right?
[00:06:51] So if you have your only the drums for instance, and you hit your record
[00:06:56] Right and you want to go to this to this I don't know to the snare
[00:07:06] You can more or less say here here. This is that's probably a snare because they are snapping
[00:07:13] You can say oh, this is this is a snare. Let's crop this
[00:07:22] And you can extract because of the snapping can extract much faster instead of you know
[00:07:28] Finding the right place
[00:07:32] Inside of the recording my opinion. It's much much better also when you work with loops or you want to export loops or you want to export
[00:07:38] Pet sounds where you don't see exactly where the pet starts, but you see
[00:07:44] Because of these lines here. Oh
[00:07:46] It should be here, right?
[00:07:50] So maybe I'll do this here. Is there something like this here lay
[00:07:56] So it's very clear because of these lines where something starts
[00:08:03] And say this is exactly one bar
[00:08:21] So
[00:08:23] My opinion it's much much easier
[00:08:28] Okay, so that's that so let's do something different here. Let's use here maybe
[00:08:35] Tutorial I
[00:08:41] Think this is pretty okay
[00:08:48] So let's say you record some kind of
[00:08:50] Random or that's on there. Let's put this on there. I record something here
[00:08:59] You can see because I don't press play here there are no markers in here, so it's completely free
[00:09:18] I play some notes and random notes in a scale
[00:09:24] And I want to have this let's say this part here
[00:09:34] That's okay, so we have this patio is actually clipping
[00:09:48] So
[00:09:50] The problem is when you use a loop here looping is active
[00:10:04] Right you can hear here is the transitioning phase so it there's still a reverb not ringing out
[00:10:14] And then you start here and it's not really looping. So what you can do now is you can just select here
[00:10:22] maybe the last part and
[00:10:24] then say
[00:10:26] Is this the rotate I don't know I renamed this multiple times
[00:10:32] Yeah, move the selected terminal tail to the front and crossfade its second half into the old beginning
[00:10:40] So when you use this here this button, it just takes this part here cuts it out and puts it in the front
[00:10:47] And then crossfades 50% from here to 50% from here. So
[00:10:53] Let's use this so now we start here, let's hit play
[00:11:11] So you can hear that's basically no transitioning anymore. It's it's a seamless loop
[00:11:16] That's way too loud doesn't matter
[00:11:37] Right so it loops seamlessly and you can't hear any transitioning at all and when I do ambient
[00:11:44] I need this all the time and I wished Bitwig had this natively inside of the
[00:11:49] Clip launcher, but it's yeah, we don't get it for some it's too it's too to niche probably
[00:11:57] so let's undo this
[00:12:00] another way of
[00:12:02] Doing this is for instance here. You can see we have here one two three four a lot of different
[00:12:09] Bars and here this one here is a bit, you know, it doesn't fit. So we want to have maybe let's say
[00:12:18] 12 bars and the rest here is too much so we can do a wrap wrap means
[00:12:26] It just doesn't offset the beginning here with the rotate with the rotate that was just offsets this here by
[00:12:33] Whatever we selected here at the back end. So it wrap it just leaves the beginning exactly where it is and
[00:12:39] Just moves this part in front and then do a crossfade
[00:12:44] Right looks like this
[00:12:48] So now we have exactly 12 bars
[00:12:54] Right, so we removed here this part with exactly 12 bars now and the end part is now the beginning part and
[00:13:01] Overlays with the beginning here without offsetting the old beginning. It sounds like this
[00:13:08] And it should also just a seamless loop
[00:13:25] So with this feature you can make and recording that's not really fitting
[00:13:34] inside of
[00:13:37] In in loop range, let's say 12 12 bars and it's like 13 bars and a half and you can just take the rest
[00:13:46] That's over and put it in front crossfade it in and then you have exactly 12 bars and it's a seamless loop
[00:13:54] So this this was the idea behind this
[00:13:56] And then of course, yeah, you can just put this here inside of the
[00:14:02] Can we say this is a loop here and maybe pads
[00:14:10] Test we have here also
[00:14:19] Sadly with the VST 3 or clap you can't read here the settings on the doors
[00:14:25] I think Ableton Live has also something like this, but you can't access it
[00:14:29] I would be nice to have so I could fill fill this in here automatically maybe in the future
[00:14:35] So we can track this out here
[00:14:37] And I don't know if this works in between here
[00:14:41] But you can just hit play and say this is a loop
[00:14:47] And then technically it should loop also seamless. There's probably a small
[00:14:53] Small gap or small little click
[00:14:57] Let's try it out. I can see it's exactly 12 bars long
[00:15:02] 11 bars long, sorry
[00:15:18] Yeah, this is small little click
[00:15:21] But you get the idea
[00:15:27] So, yeah, this is this is my idea here for the polarity recorder you can also
[00:15:35] resize it of course
[00:15:37] and then for me, it's really really nice to have here this history of
[00:15:43] Exporter things because you can build up a nice sample library or if you do some sound experiments all the time
[00:15:50] And you need to bounce certain small parts of your song or
[00:15:54] You know what I mean, you can just build some kind of library and you can always
[00:16:01] Refer to that you can load it back into it into the editor here make some adjustments
[00:16:08] Or you just drag it out into your door or into your sampler from this
[00:16:14] Explorer here on the right side. You can also rename it. It's probably not perfect, but I try to implement
[00:16:21] Many features I really wanted to have in such an editor and in my opinion stuff like this should be part of
[00:16:30] the door itself
[00:16:34] Because nowadays a lot of people do a lot of sound
[00:16:39] Experiments and they want to keep their sound experiments and bring them back in as a sample
[00:16:44] And this old kind of workflow of bouncing and right-clicking bouncing and then you know and like to find it in the Explorer
[00:16:51] Drag it back in and so on. It's a bit, you know, come for some and sometimes you just play on your instruments
[00:16:58] Play around and you get a nice little accident and it's not recorded, right?
[00:17:05] So with this week at least you need to put it on the master or if you don't need to have here these lines
[00:17:12] Then you can put it into the door
[00:17:17] Or if you don't need the lines you can use it as a standalone outside of the door
[00:17:23] But it's better probably inside of a door as a plug-in
[00:17:26] So yeah, let me know what you think about it. Give me feedback. I
[00:17:31] Try to walk it in fix some bugs. Maybe there are some some bigger issues
[00:17:36] I just tested this only on my Mac and my Windows PC
[00:17:41] On rebar and able to live and it worked for me. I know a lot of people have problems with the plug-ins on
[00:17:48] Mac OS because I it's not signed by Apple itself and it cost me 100 bucks a year just to make this
[00:17:58] Assignage
[00:18:00] Assigned
[00:18:02] Assigned download. I don't know if you want to do this, but probably in the future. I need to do it
[00:18:07] And yeah, it also works on Linux, but I haven't tested this just too much on links
[00:18:15] So keep please give me feedback if there are some bigger problems in there or if you have some feature requests
[00:18:20] Let me know. Okay. So the link to this website here is in the description below
[00:18:25] Like I said, you don't need to log in or anything
[00:18:29] You can maybe donate something to me if you want to or subscribe on patreon for some
[00:18:35] updates so you get emails when something is updated and
[00:18:39] Yeah, I think that's it. Let me know what you think. Have a good weekend. See you next time. Bye

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