Case
aiosendspin -> sendspin-js
Start the server first, then the client. The client discovers or looks up the server, initiates the WebSocket connection, advertises PCM as its only supported audio format, streams audio derived from almost_silent.flac, and compares canonical PCM hashes.
Server
aiosendspin
Client
sendspin-js
Status
Failed
Client summary shows zero audio chunks
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__client-initiated-pcm__aiosendspin__to__sendspin-js",
"client_exit_code": 0,
"client_impl": "sendspin-js",
"reason": "Client summary shows zero audio chunks",
"scenario_id": "client-initiated-pcm",
"server_exit_code": 0,
"server_impl": "aiosendspin",
"status": "failed"
}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": 0,
"sent_codec_header_sha256": null,
"sent_encoded_byte_count": 0,
"sent_encoded_sha256": null,
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"trimmed_source_frames": 0
},
"client": {
"active_roles": [],
"client_id": "PwSdx3FizYHZreSIgCu92jIV6gqG83UmZgFXYmFxg3I",
"name": "sendspin-js-client",
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "aiosendspin",
"initiator_role": "client",
"peer_hello": {
"payload": {
"device_info": {
"manufacturer": "Unknown",
"software_version": "Node.js/22"
},
"name": "sendspin-js-client",
"player@v1_support": {
"buffer_capacity": 5760000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 48000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 44100
}
]
},
"supported_pair_methods": [],
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"trust_level": "none",
"unpaired_access": {
"enabled": true
}
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "client-initiated-pcm",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"status": "ok",
"stream": null
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 18931
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:18931
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": 0,
"sent_codec_header_sha256": null,
"sent_encoded_byte_count": 0,
"sent_encoded_sha256": null,
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"trimmed_source_frames": 0
},
"client": {
"active_roles": [],
"client_id": "PwSdx3FizYHZreSIgCu92jIV6gqG83UmZgFXYmFxg3I",
"name": "sendspin-js-client",
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "aiosendspin",
"initiator_role": "client",
"peer_hello": {
"payload": {
"device_info": {
"manufacturer": "Unknown",
"software_version": "Node.js/22"
},
"name": "sendspin-js-client",
"player@v1_support": {
"buffer_capacity": 5760000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 48000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 44100
}
]
},
"supported_pair_methods": [],
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"trust_level": "none",
"unpaired_access": {
"enabled": true
}
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "client-initiated-pcm",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"status": "ok",
"stream": null
}
WARNING:root:server.close() timed out after 5s; continuing shutdown
ERROR:asyncio:Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x10a76be00>
Client summary (JSON)
RAW{
"audio": {
"audio_chunk_count": 0,
"received_encoded_sha256": null,
"received_pcm_sha256": null,
"received_sample_count": 0
},
"client_id": "sendspin-js-client-id",
"client_name": "sendspin-js-client",
"implementation": "sendspin-js",
"initiator_role": "client",
"peer_hello": null,
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "client-initiated-pcm",
"server": null,
"status": "ok",
"stream": null
}Client log
RAW[Opus] Native decoder not available, falling back to FLAC/PCM
Sendspin: no storage provided, using an ephemeral identity (client_id changes each session, pairing unavailable)
Sendspin: Adopted WebSocket connected
Sendspin: Connected to server
[Opus] Native decoder not available, falling back to FLAC/PCM
Sendspin: WebSocket disconnected
Sendspin: Connection closed
{
"status": "ok",
"implementation": "sendspin-js",
"role": "client",
"scenario_id": "client-initiated-pcm",
"initiator_role": "client",
"preferred_codec": "pcm",
"client_id": "sendspin-js-client-id",
"client_name": "sendspin-js-client",
"peer_hello": null,
"server": null,
"stream": null,
"audio": {
"audio_chunk_count": 0,
"received_encoded_sha256": null,
"received_pcm_sha256": null,
"received_sample_count": 0
}
}
Server build log · python-adapters · built · 0.05s
RAWListing 'src'... Listing 'src/conformance'... Listing 'src/conformance/adapters'... Compiling 'src/conformance/adapters/__init__.py'... Compiling 'src/conformance/adapters/_aiosendspin_pairing.py'... Compiling 'src/conformance/adapters/_aiosendspin_protocol_evidence.py'... Compiling 'src/conformance/adapters/aiosendspin_client.py'... Compiling 'src/conformance/adapters/aiosendspin_server.py'... Compiling 'src/conformance/adapters/placeholder.py'... Compiling 'src/conformance/adapters/sendspin_jvm_client.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/detect_regressions.py'... Compiling 'scripts/merge_results.py'... Compiling 'scripts/run_all.py'... Compiling 'scripts/setup_repositories.py'... Compiling 'scripts/setup_workspace.py'...
Client build log · sendspin-js-adapters · built · 68.34s
RAWNo build detail was recorded.