Case
aiosendspin -> sendspin-js
Start the server first, then the client. The client advertises a listener and PCM as its only supported audio format, the server connects in, streams audio derived from almost_silent.flac, disconnects, and the matrix 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__server-initiated-pcm__aiosendspin__to__sendspin-js",
"client_exit_code": 0,
"client_impl": "sendspin-js",
"reason": "Client summary shows zero audio chunks",
"scenario_id": "server-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": "osagZYt2NGzW7JQN31NS1ShyPuytVARTrAIP6_XXz20",
"name": "sendspin-js-client",
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
]
},
"discovery_method": "registry_fallback",
"implementation": "aiosendspin",
"initiator_role": "server",
"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": "server-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 18947
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:18947
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": "osagZYt2NGzW7JQN31NS1ShyPuytVARTrAIP6_XXz20",
"name": "sendspin-js-client",
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
]
},
"discovery_method": "registry_fallback",
"implementation": "aiosendspin",
"initiator_role": "server",
"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": "server-initiated-pcm",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"status": "ok",
"stream": null
}
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": "server",
"peer_hello": null,
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "server-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 open WebSocket
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": "server-initiated-pcm",
"initiator_role": "server",
"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.