Resonance for Kodi

Resonance plays Spotify Premium music through Kodi. It browses Spotify playlists, search results, albums, artists and links, then streams tracks through bundled Spotty/librespot playback helpers.

Quick Facts
Spotify account	Premium required
Supported target	LibreELEC on Raspberry Pi ARM/AArch64
Experimental target	Android ARMv7/AArch64
Not supported	Windows, macOS, Linux x86/x64
Catalogue	Regular Spotify Web API with browser PKCE token
Playback	Spotify Device Connect with Spotty/librespot
Version	1.1.8 (Android test build)

Quick Start

1. For this test build, run python scripts/package_addon.py and use dist/plugin.audio.resonance-1.1.8.zip. Upstream releases are available on the Releases page.
2. In Kodi, install it with Add-ons -> Install from zip file.
3. Restart Kodi once.
4. Open Add-ons -> Music add-ons -> Resonance.
5. Create a Spotify Developer app, add the redirect URI below, and paste its Client ID into Settings -> Advanced.
6. Use Set up Spotify. Resonance pairs playback first, then shows a QR code and URL for browser sign-in.

Upgrading from 1.0.x

1. Install the new zip over the old version and restart Kodi.
2. Open Account and status and choose Reauthorize Spotify once. Spotify asks for the library and playlist permissions that the new write actions need.
3. The local Favorites are gone. Use Your Spotify Library and the Spotify write actions instead: liked tracks, saved albums, followed artists and your playlists are read straight from Spotify.

https://resonance-spotify-callback.vercel.app/api/callback

Features

• Search Spotify tracks, albums and artists.
• Browse and play tracks from your Spotify Liked Songs library.
• Browse saved albums, followed artists, and saved or followed playlists in Your Spotify Library.
• Like or unlike tracks and save or remove albums in your Spotify library.
• Add tracks to playlists owned by your Spotify account.
• Create a playlist in your Spotify account, optionally with the track you started from.
• Unfollow a playlist or artist that you follow, so it leaves Your Spotify Library.
• Browse your Spotify playlists, including private playlists available to your account.
• Browse album tracks, playlist tracks and artist albums.
• Open Spotify track, album, playlist and artist links or URIs through the plugin's open_link action.
• Play individual tracks.
• Queue the rest of the current page from a selected track.
• Queue the rest of a playlist from a selected track.
• View current playback, configured audio quality and Spotify Connect pairing status.
• Read the account and status page at a glance: it is grouped into Account, Catalogue, Playback and Maintenance, with one icon per row.
• Give every menu row its own icon, bundled with the add-on, so the menus look the same in every skin.
• Identify followed and shared playlists and get guidance when Spotify blocks playlist contents.
• Open supported artist views from track, album and artist context menus: everything, top songs, albums, singles and appears on.
• See the release notes of the running version in a big window after every update, and any time under Account and status with the row What's new.
• Cache successful catalogue responses.
• Refresh playlist membership in the background while signed in.

The catalogue uses Spotify's regular Web API only. There is no public catalogue fallback service.

Setup Details

One Setup, Two Spotify Authorizations

Resonance uses two Spotify sign-ins because playback and browsing need different tokens. The add-on presents them as one setup flow.

Purpose	Method	Used for
Playback	Spotify Device Connect	Pairing the Kodi box as a Spotify playback device
Catalogue	Browser sign-in with PKCE	Search, playlists, Liked Songs, saved albums, followed artists, links and track metadata

Pair Playback

1. Open Resonance.
2. Choose Set up Spotify.
3. On your phone or computer, open the Spotify app with your Premium account.
4. Open the device picker and select the Kodi-Resonance-XXXX device.
5. Wait for the playback-pairing notification. This is step 1; browser sign-in is still required for search and playlists.

Your phone or computer and the Kodi box must be on the same network.

Create A Spotify App

The catalogue sign-in needs your own Spotify Web API Client ID. Resonance does not bundle a shared Client ID.

1. Open the Spotify Developer Dashboard.
2. Create an app with Web API access.
3. Add this Redirect URI exactly:

https://resonance-spotify-callback.vercel.app/api/callback

4. Copy the app's 32-character Client ID.
5. In Kodi, open Resonance -> Settings -> Advanced.
6. Paste the Client ID into Spotify Web API client ID.
7. Leave Web Auth redirect URI set to the hosted callback URL above unless you run your own callback relay.

Host Your Own Spotify Callback Relay on Vercel

The default callback is hosted by the Resonance project. If you prefer to control the callback deployment and its temporary storage yourself, deploy the included relay from your own GitHub and Vercel accounts:

1. Fork the Resonance repository to your GitHub account. Review the source in vercel/resonance-callback before deploying it.

2. In Vercel, choose Add New → Project, import your fork, and set Root Directory to vercel/resonance-callback. Keep the included api/, package.json, and vercel.json files. Deploy the project.

3. For automatic code delivery to Kodi, add an Upstash Redis database to the Vercel project using the Vercel Marketplace integration. The relay needs a REST URL and token. It recognizes KV_REST_API_URL with KV_REST_API_TOKEN, or UPSTASH_REDIS_REST_URL with UPSTASH_REDIS_REST_TOKEN. The integration normally adds these to the project environment. Redeploy after connecting the database. Choose a plan that fits your use; the provider may charge for usage.

4. Check https://<your-project>.vercel.app/api/status. It should return {"ok":true,"service":"resonance-callback"}. With Redis connected, https://<your-project>.vercel.app/api/poll?state=manual-check should return {"waiting":true}.

5. In the Spotify Developer Dashboard for the Client ID used by Resonance, add this exact HTTPS Redirect URI, replacing the project name:

   https://<your-project>.vercel.app/api/callback
   

   Spotify requires the redirect URI in the authorization request to exactly match an entry in the app settings. See Spotify's redirect URI requirements.

6. In Kodi, open Resonance → Settings → Advanced and set Web Auth redirect URI to that same /api/callback URL. Save it, then start browser sign-in again.

The relay temporarily stores the authorization code in Redis for up to 10 minutes, keyed by the one-time OAuth state; Kodi polls for it, and the relay deletes it when delivered. The code is exchanged for tokens by Kodi using its PKCE verifier. The relay does not need your Spotify Client Secret. Anyone operating the deployed relay and its storage controls that part of the login flow, which is why you may choose to run your own.

Redis is needed for automatic polling. Without Redis, the callback still shows the code in the browser, so you can use Resonance's Paste code fallback; automatic polling will report that storage is not configured. Keep the relay and its Redis credentials private to your own Vercel project, and do not commit database tokens into the fork.

Sign In For Catalogue Browsing

1. Open Resonance -> Set up Spotify or Settings -> Account & Connection -> Set up Spotify.
2. After playback pairing, scan the QR code shown by Kodi or use the URL below it on another device.
3. Approve the Spotify request.
4. The hosted callback relay stores the authorization code briefly, and Kodi polls it automatically.
5. The QR panel closes automatically when sign-in completes. Search, playlists and Spotify links then use the browser Web API token.

If the dialog times out after approval, use Resume browser sign-in (paste code) and paste the code value from the browser address bar.

Usage And Settings

Usage

• On Android ARMv7 or AArch64 (including Shield), keep Kodi running and select Kodi-Resonance in Spotify Desktop or mobile's device picker after setup. Songs play through Kodi; control playback, pause, track selection, seeking and volume from Spotify. Kodi pause/resume/stop are forwarded to Connect. Starting another item in Kodi releases the Connect session. Kodi's elapsed time restarts after a desktop seek; Spotify shows the actual song position.
• Open Your Spotify Library to browse Liked Songs, Saved Albums, Followed Artists, and Saved and Followed Playlists.
• Open Search and choose tracks, albums or artists.
• Use a track context menu to like/unlike it on Spotify or add it to one of your own playlists. Album context menus can save or remove the album from your Spotify library. These actions update your Spotify account.
• The context menu only offers the action that makes sense: Like on Spotify is hidden for tracks that are already in Liked Songs, and Save album on Spotify is hidden for albums that are already in your library. Both appear again when Spotify cannot answer the check.
• Open a playlist of your own and use the track context menu to remove a track from it. The entry is named Remove from <playlist> and always removes the track from that playlist, so there is no playlist to choose. The entry only shows inside a playlist the account owns, where the track really is in that playlist.
• Use a track context menu to unfollow a playlist from Saved and Followed Playlists and an artist from Followed Artists. Unfollowing only removes the item from your library; Spotify keeps the playlist or artist itself.
• Choose Create playlist... in Your Spotify Library to make a new playlist, or Create playlist with this track... in a track context menu to start one with that track. New playlists are created with the private flag, which Spotify only allows with the playlist modification permission that Reauthorize Spotify grants, and they show up in Saved and Followed Playlists.
• Select a track to play it.
• Use a track context menu to start playback from that row through the rest of the current page.
• From a playlist track, choose Play playlist from here to queue that song and the remaining playlist tracks.
• Spotify links are no longer on the main menu. Open open.spotify.com/... URLs or spotify:... URIs with the plugin's open_link action, for example from a Kodi favourites entry pointing at plugin://plugin.audio.resonance/?action=open_link.
• Use Playback status to see the current Kodi track, configured Spotify bitrate and playback pairing.
• Use Account and status to see the state of the add-on at a glance. The page is grouped into Account (sign-in state, reauthorize), Catalogue (playlists, token), Playback (status, pairing, quality) and Maintenance (clear cache, sign out). Every row has its own icon, so the page can be scanned without reading long sentences.
• Existing users need to choose Reauthorize Spotify under Account and status and approve the Spotify library, playlist, and followed-artist permissions before using these views or Spotify write actions.

Playlist data refreshes roughly every 30 minutes while signed in. A manual refresh is available from Account and status.

Settings

Category	Setting	Purpose
Account & Connection	Set up Spotify	Runs the setup flow: Device Connect pairing for playback, then QR/browser PKCE sign-in for catalogue browsing.
Playback	Playback quality	Spotify bitrate: 96, 160 or 320 kbps.
Playback	Volume normalization	Spotty normalization mode: Track, Album or Automatic.
Maintenance	Sign out of Spotify	Clears the local sign-in state and catalogue cache.
Maintenance	Clear cache	Clears cached catalogue responses without removing sign-in state.
Advanced	Spotify Web API client ID	Your Spotify app Client ID for browser sign-in.
Advanced	Web Auth redirect URI	OAuth redirect URI; defaults to the hosted Resonance callback relay.
Advanced	Bypass cached API responses	Forces fresh Spotify Web API requests while still honoring cooldowns.
Advanced	Verbose debug logging	Writes additional diagnostics to the Kodi log.

Platforms And Limits

Supported Platforms

Platform	Status
LibreELEC / Raspberry Pi ARM or AArch64	Supported and tested
Android ARMv7 / AArch64	Experimental; helper binaries are bundled
Windows x64, macOS, Linux x86/x64	Not supported in this release; matching playback helper binaries are not bundled

Limits

• Spotify Premium is required for playback.
• Spotify write actions use the current library and playlist endpoints. Like/unlike, save/remove album and unfollow playlist or artist use PUT/DELETE /me/library; adding a track uses POST /playlists/{id}/items, removing one uses DELETE /playlists/{id}/items and creating a playlist uses POST /me/playlists. The state of the library is read with GET /me/library/contains, so the context menu can hide actions that would not change anything. The account must authorize the corresponding library and playlist modification scopes. See Spotify's February 2026 migration guide.
• Spotify only allows playlist-item reads for playlists you own or collaborate on. See Spotify's Get Playlist Items reference.
• Spotify has no endpoint that lists the playlists a track belongs to, so a track can only be removed from a playlist from that playlist's own page. Resonance therefore offers Remove from <playlist> inside your playlists and nowhere else.
• There is no playlist search. Because Spotify never shares playlist contents with followers, a playlist search could only list playlists Resonance cannot open. Playlists stay available through Your Spotify Library and the open_link action.
• Lyrics, podcasts, audiobooks, recently played and top lists are not included.
• Spotify Web API availability, account permissions, app Development Mode restrictions and rate limits determine what catalogue pages can be loaded.
• Playback is streaming-only; offline downloads are not supported.

Troubleshooting

Device Connect Does Not Complete

• Confirm the phone or computer and Kodi box are on the same network.
• Make sure Spotify Premium is active on the account in the Spotify app.
• Retry pairing from Resonance.
• Check /storage/.kodi/temp/kodi.log for DEVICE_CONNECT_DIAG messages.
• The pairing receiver writes its own log to:

/storage/.kodi/userdata/addon_data/plugin.audio.resonance/runtime/device-connect.log

• When the receiver refuses to start, the tail of that file is copied into the Kodi log as result=immediate_exit.

Browser Sign-In Fails

• Confirm Spotify Web API client ID is a complete 32-character Client ID.
• Confirm Web Auth redirect URI exactly matches the Redirect URI in the Spotify Developer Dashboard.
• Use the full URL written to:

/storage/.kodi/userdata/addon_data/plugin.audio.resonance/web-auth-url.txt

• If approval succeeded but Kodi stopped waiting, use the paste-code resume option.

Playlists Are Empty

• Complete browser sign-in; playlists use the browser Spotify Web API token.
• Refresh playlists from Account and status.
• Check that the Spotify account actually has playlists visible to the app.

A Followed Playlist Will Not Open

Spotify can list followed playlists that the Web API will not let this app read unless you own the playlist or are a collaborator. Resonance keeps those playlists visible, but opening one shows a message telling you to make your own copy in Spotify and refresh playlists.

Tracks Do Not Play

• Confirm Device Connect pairing is complete.
• Confirm the account has Spotify Premium.
• Restart Kodi after installing or updating.
• Some tracks may be unavailable in your region or unavailable to the account.

Development

Build an installable ZIP, including both Android helpers and the licenses:

python scripts/package_addon.py

This writes the versioned ZIP and SHA-256 checksum to dist/. Local caches, credentials, logs, tests and development tools are excluded. Native helper rebuild instructions are in resources/lib/deps/spotty/arm-android/BUILD.md.

To stage the package in an existing test repository checkout:

python scripts/stage_test_repo.py /path/to/repository --release omega

The staging command copies the distributable source, package and metadata assets, then updates that channel's add-on index and MD5. It does not commit or push.

Run a syntax pass:

find . -name '*.py' -print0 | xargs -0 python3 -m py_compile

Important paths:

Path	Purpose
plugin.py	Kodi plugin/browser entry point
service.py	Background service for auth renewal, playlist refresh and audio streaming
resources/settings.xml	Add-on settings
resources/media/	Menu icons bundled with the add-on
resources/lib/catalogue.py	Spotify Web API catalogue, cache and cooldown handling
resources/lib/web_auth.py	Browser PKCE login and token refresh
resources/lib/qr_dialog.py	Local QR-code popup helper for login links
resources/lib/deps/qrcodegen.py	Bundled pure-Python QR-code generator
resources/lib/spotty*.py	Spotty/librespot helper selection and audio transport

Credits, License And Disclaimer

Resonance includes work made possible by the Kodi Spotify add-on community and the bundled open-source dependencies.

Thanks and credit to:

• Marcel Veldt, Ldsz, Elkropac, FernetMenta and earlier Kodi Spotify add-on contributors.
• glk1001/plugin.audio.spotify.
• herberto08/plugin.audio.spotify2-releases.
• Michael Herger and the librespot-org/librespot community.
• The spotipy project.
• The bottle project.
• Project Nayuki's QR Code generator library, bundled under the MIT License.

This project is distributed under the terms in LICENSE.txt. Bundled dependencies and native helper binaries may carry their own upstream licensing and attribution requirements.

Resonance is provided as-is, without warranty or guarantee of functionality. Spotify is a trademark of Spotify AB. This add-on uses Spotify-related APIs and playback components but is not endorsed, sponsored, certified or otherwise approved by Spotify.