Case
aiosendspin -> sendspin-dotnet
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.
Server
aiosendspin
Client
sendspin-dotnet
Status
Passed
PCM hashes match exactly
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__client-initiated-pcm__aiosendspin__to__sendspin-dotnet",
"client_exit_code": 0,
"client_impl": "sendspin-dotnet",
"reason": "PCM hashes match exactly",
"scenario_id": "client-initiated-pcm",
"server_exit_code": 0,
"server_impl": "aiosendspin",
"status": "passed"
}Server summary (JSON)
RAW{
"audio": {
"bit_depth": 16,
"channels": 1,
"clip_seconds": 5.0,
"duration_seconds": 5.0,
"fixture": "/Users/runner/work/conformance/conformance/repos/sendspin-cli/tests/fixtures/almost_silent.flac",
"frame_alignment_samples": null,
"frame_count": 40000,
"sample_rate": 8000,
"sent_audio_chunk_count": 200,
"sent_codec_header_sha256": null,
"sent_encoded_byte_count": 80000,
"sent_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"trimmed_source_frames": 0
},
"client": {
"active_roles": [
"player@v1"
],
"client_id": "sendspin-dotnet-client-id",
"name": "sendspin-dotnet-client",
"supported_roles": [
"player@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "aiosendspin",
"initiator_role": "client",
"peer_hello": {
"payload": {
"client_id": "sendspin-dotnet-client-id",
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "Conformance Dotnet Client",
"software_version": "0.1.0"
},
"name": "sendspin-dotnet-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
]
},
"supported_roles": [
"player@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "client-initiated-pcm",
"server_id": "aiosendspin-server",
"server_name": "aiosendspin server",
"status": "ok",
"stream": {
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 18929
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:18929
WARNING:aiosendspin.server.server:No IP addresses available for mDNS advertising. Clients may not be able to discover this server. Consider specifying addresses manually via advertise_addresses.
{
"audio": {
"bit_depth": 16,
"channels": 1,
"clip_seconds": 5.0,
"duration_seconds": 5.0,
"fixture": "/Users/runner/work/conformance/conformance/repos/sendspin-cli/tests/fixtures/almost_silent.flac",
"frame_alignment_samples": null,
"frame_count": 40000,
"sample_rate": 8000,
"sent_audio_chunk_count": 200,
"sent_codec_header_sha256": null,
"sent_encoded_byte_count": 80000,
"sent_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"trimmed_source_frames": 0
},
"client": {
"active_roles": [
"player@v1"
],
"client_id": "sendspin-dotnet-client-id",
"name": "sendspin-dotnet-client",
"supported_roles": [
"player@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "aiosendspin",
"initiator_role": "client",
"peer_hello": {
"payload": {
"client_id": "sendspin-dotnet-client-id",
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "Conformance Dotnet Client",
"software_version": "0.1.0"
},
"name": "sendspin-dotnet-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
]
},
"supported_roles": [
"player@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "client-initiated-pcm",
"server_id": "aiosendspin-server",
"server_name": "aiosendspin server",
"status": "ok",
"stream": {
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}
INFO:aiohttp.access:127.0.0.1 [29/Mar/2026:04:41:10 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "-"
Client summary (JSON)
RAW{
"audio": {
"audio_chunk_count": 200,
"received_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_id": "sendspin-dotnet-client-id",
"client_name": "sendspin-dotnet-client",
"implementation": "sendspin-dotnet",
"initiator_role": "client",
"peer_hello": {
"payload": {
"active_roles": [
"player@v1"
],
"connection_reason": "discovery",
"name": "aiosendspin server",
"server_id": "aiosendspin-server",
"version": 1
},
"type": "server/hello"
},
"preferred_codec": "pcm",
"reason": null,
"role": "client",
"scenario_id": "client-initiated-pcm",
"server": {
"connection_reason": "discovery",
"server_id": "aiosendspin-server",
"server_name": "aiosendspin server"
},
"status": "ok",
"stream": {
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
}Client log
RAW04:41:10 info: Sendspin.SDK.Client.SendspinClientService[0] Connecting to ws://127.0.0.1:18929/sendspin
04:41:10 info: Sendspin.SDK.Connection.SendspinConnection[0] Connecting to ws://127.0.0.1:18929/sendspin...
04:41:10 info: Sendspin.SDK.Connection.SendspinConnection[0] Connected to ws://127.0.0.1:18929/sendspin
04:41:10 info: Sendspin.SDK.Client.SendspinClientService[0] Sending client/hello: {"type":"client/hello","payload":{"client_id":"sendspin-dotnet-client-id","name":"sendspin-dotnet-client","version":1,"supported_roles":["player@v1"],"player@v1_support":{"supported_formats":[{"codec":"pcm","channels":1,"sample_rate":8000,"bit_depth":16}],"buffer_capacity":2000000,"supported_commands":["volume","mute"]},"artwork@v1_support":{"channels":[{"source":"album","format":"jpeg","media_width":256,"media_height":256}]},"device_info":{"product_name":"Conformance Dotnet Client","manufacturer":"Sendspin Conformance","software_version":"0.1.0"}}}
04:41:10 info: Sendspin.SDK.Client.SendspinClientService[0] Server hello received: aiosendspin-server (aiosendspin server), reason: discovery, roles: player@v1
04:41:10 info: Sendspin.SDK.Client.SendspinClientService[0] Sending initial client/state: {"type":"client/state","payload":{"state":"synchronized","player":{"volume":100,"muted":false}}}
04:41:10 info: Sendspin.SDK.Client.SendspinClientService[0] Handshake complete with server aiosendspin-server (aiosendspin server)
04:41:10 info: Sendspin.SDK.Client.SendspinClientService[0] Stream starting: PCM 8000Hz 1ch 16bit
04:41:11 warn: Sendspin.SDK.Synchronization.KalmanClockSynchronizer[0] Non-positive time delta: -0.43678s, skipping measurement
04:41:16 info: Sendspin.SDK.Client.SendspinClientService[0] Stream ended: unknown
04:41:17 info: Sendspin.SDK.Connection.SendspinConnection[0] Server closed connection: NormalClosure -
{
"status": "ok",
"reason": null,
"implementation": "sendspin-dotnet",
"role": "client",
"scenario_id": "client-initiated-pcm",
"initiator_role": "client",
"preferred_codec": "pcm",
"client_name": "sendspin-dotnet-client",
"client_id": "sendspin-dotnet-client-id",
"server": {
"server_id": "aiosendspin-server",
"server_name": "aiosendspin server",
"connection_reason": "discovery"
},
"peer_hello": {
"payload": {
"server_id": "aiosendspin-server",
"name": "aiosendspin server",
"version": 1,
"active_roles": [
"player@v1"
],
"connection_reason": "discovery"
},
"type": "server/hello"
},
"stream": {
"codec": "pcm",
"sample_rate": 8000,
"channels": 1,
"bit_depth": 16
},
"audio": {
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"received_sample_count": 40000,
"audio_chunk_count": 200
}
}
04:41:17 warn: Sendspin.SDK.Client.SendspinClientService[0] Failed to send time sync burst System.InvalidOperationException: WebSocket is not connected at Sendspin.SDK.Connection.SendspinConnection.SendMessageAsync[T](T message, CancellationToken cancellationToken) in /Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Connection/SendSpinConnection.cs:line 171 at Sendspin.SDK.Client.SendspinClientService.SendTimeSyncBurstAsync(CancellationToken cancellationToken) in /Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Client/SendSpinClient.cs:line 579
Server build log · python-adapters · built · 0.04s
RAWListing 'src'... Listing 'src/conformance'... Listing 'src/conformance/adapters'... Compiling 'src/conformance/adapters/__init__.py'... Compiling 'src/conformance/adapters/aiosendspin_client.py'... Compiling 'src/conformance/adapters/aiosendspin_server.py'... Compiling 'src/conformance/adapters/placeholder.py'... Compiling 'src/conformance/cli.py'... Compiling 'src/conformance/merge.py'... Compiling 'src/conformance/registry.py'... Listing 'src/sendspin_conformance.egg-info'... Listing 'scripts'... Compiling 'scripts/merge_results.py'... Compiling 'scripts/run_all.py'... Compiling 'scripts/setup_repositories.py'... Compiling 'scripts/setup_workspace.py'...
Client build log · sendspin-dotnet-client · built · 11.24s
RAWork=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(63,34): warning SA1618: The documentation for type parameter 'T' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1618.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(63,50): warning SA1127: Generic type constraints should be on their own line (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1127.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(37,48): warning SA1611: The documentation for parameter 'json' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1611.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(37,19): warning SA1615: Element return value should be documented (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1615.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(71,49): warning SA1611: The documentation for parameter 'json' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1611.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(71,19): warning SA1615: Element return value should be documented (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1615.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(91,61): warning SA1611: The documentation for parameter 'utf8Json' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1611.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(91,19): warning SA1615: Element return value should be documented (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1615.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.OrderingRules.SA1201ElementsMustAppearInTheCorrectOrder' threw an exception of type 'System.Collections.Generic.KeyNotFoundException' with message 'The given key 'RecordStructDeclaration' was not present in the dictionary.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Program.cs(589,52): warning CS0067: The event 'HashingAudioPipeline.ErrorOccurred' is never used [/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Conformance.SendspinDotnet.Client.csproj]
581 Warning(s)
0 Error(s)
Time Elapsed 00:00:09.84