Overview

Sendspin conformance overview

Sendspin is a local-network protocol for discovering peers and exchanging synchronized audio plus companion data such as metadata, artwork, and controller messages between servers and clients. This report tests how different Sendspin implementations interoperate with one another, with each matrix showing which server and client pairings pass the current conformance scenarios.

Total

84

all scenarios

Passed

48

passing

Failed

36

failing

Conformance sourceSendspin-audio.com

Test

Client Initiated PCM

Start the server first, then the client. The client discovers or looks up the server, initiates the WebSocket connection, negotiates PCM transport, streams audio derived from almost_silent.flac, and compares canonical PCM hashes.

8 passed6 failedView test sourceScenario page

Matrix

Select a server and client pairing to inspect.

Axis

Server \ Client

Client

SendspinKit

Client

aiosendspin

Client

sendspin-cpp

Client

sendspin-dotnet

Client

sendspin-go

Client

sendspin-js

Client

sendspin-rs

Server

aiosendspin

FailedPassedPassedPassedPassedFailedFailed

Server

sendspin-go

FailedPassedPassedPassedPassedFailedFailed

Test

Server Initiated PCM

Start the server first, then the client. The client advertises a listener, the server connects in, negotiates PCM transport, streams audio derived from almost_silent.flac, disconnects, and the matrix compares canonical PCM hashes.

8 passed6 failedView test sourceScenario page

Matrix

Select a server and client pairing to inspect.

Axis

Server \ Client

Client

SendspinKit

Client

aiosendspin

Client

sendspin-cpp

Client

sendspin-dotnet

Client

sendspin-go

Client

sendspin-js

Client

sendspin-rs

Server

aiosendspin

FailedPassedPassedPassedPassedFailedFailed

Server

sendspin-go

FailedPassedPassedPassedPassedFailedFailed

Test

Server Initiated Metadata

Start the server first, then the client. The client advertises a listener, the server connects in, sends a metadata state update, disconnects, and the matrix compares a normalized metadata snapshot.

8 passed6 failedView test sourceScenario page

Matrix

Select a server and client pairing to inspect.

Axis

Server \ Client

Client

SendspinKit

Client

aiosendspin

Client

sendspin-cpp

Client

sendspin-dotnet

Client

sendspin-go

Client

sendspin-js

Client

sendspin-rs

Server

aiosendspin

FailedPassedPassedPassedPassedFailedFailed

Server

sendspin-go

FailedPassedPassedPassedPassedFailedFailed

Test

Server Initiated Artwork

Start the server first, then the client. The client advertises a listener, the server connects in, streams album artwork, disconnects, and the matrix compares the received bytes against the server's encoded artwork.

8 passed6 failedView test sourceScenario page

Matrix

Select a server and client pairing to inspect.

Axis

Server \ Client

Client

SendspinKit

Client

aiosendspin

Client

sendspin-cpp

Client

sendspin-dotnet

Client

sendspin-go

Client

sendspin-js

Client

sendspin-rs

Server

aiosendspin

FailedPassedPassedPassedPassedFailedFailed

Server

sendspin-go

FailedPassedPassedPassedPassedFailedFailed

Test

Server Initiated Controller

Start the server first, then the client. The client advertises a listener, the server connects in, observes controller state, receives a control command, disconnects, and the matrix verifies the recorded command.

8 passed6 failedView test sourceScenario page

Matrix

Select a server and client pairing to inspect.

Axis

Server \ Client

Client

SendspinKit

Client

aiosendspin

Client

sendspin-cpp

Client

sendspin-dotnet

Client

sendspin-go

Client

sendspin-js

Client

sendspin-rs

Server

aiosendspin

FailedPassedPassedPassedPassedFailedFailed

Server

sendspin-go

FailedPassedPassedPassedPassedFailedFailed

Test

Server Initiated FLAC

Start the server first, then the client, let the server discover/connect, stream FLAC derived from almost_silent.flac, and compare the transported FLAC header and chunk bytes as received by the client.

8 passed6 failedView test sourceScenario page

Matrix

Select a server and client pairing to inspect.

Axis

Server \ Client

Client

SendspinKit

Client

aiosendspin

Client

sendspin-cpp

Client

sendspin-dotnet

Client

sendspin-go

Client

sendspin-js

Client

sendspin-rs

Server

aiosendspin

FailedPassedPassedPassedPassedFailedFailed

Server

sendspin-go

FailedPassedPassedPassedPassedFailedFailed

Repository versions

Checked-out revisions

These are the exact checked-out commits used for this report. Each row links to the selected GitHub commit, shows the latest change included in that checkout, and notes how far the checkout sits ahead of the latest tagged release.

aiosendspin
Filtered results
Client code

Commit

4b862eb

Latest change

fix(connection): enforce server/hello before role messages (#175)

2026-03-04

Release delta

4.3.2 · 0 commits ahead
sendspin-dotnet
Filtered results
Client code

Commit

c93114f

Latest change

Fix tag message extraction for annotated tags in publish workflow

2026-03-07

Release delta

v7.3.0 · 1 commit ahead
SendspinKit
Filtered results
Client code

Commit

b769dab

Latest change

feat: align with Sendspin protocol spec v1

2025-12-05

Release delta

v0.3.4 · 2 commits ahead
sendspin-js
Filtered results
Client code

Commit

a9e5da5

Latest change

Add support for remote per-player delay configuration (#66)

2026-03-27

Release delta

2.0.5 · 4 commits ahead
sendspin-rs
Filtered results
Client code

Commit

d6dc3bf

Latest change

feat!: align protocol message types with Sendspin spec (#31)

2026-03-27

Release delta

v0.1.2 · 1 commit ahead
sendspin-cpp
Filtered results
Client code

Commit

5e11806

Latest change

extract connection management to a standalone class

2026-03-27

Release delta

No release tag found
sendspin-go
Filtered results
Client code

Commit

366af20

Latest change

Updated .gitignore to include 'ma-player' 🎮🚫

2025-12-16

Release delta

v1.0.0 · 12 commits ahead