Case
aiosendspin -> sendspin-go
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-go
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-go",
"client_exit_code": 0,
"client_impl": "sendspin-go",
"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": 120000,
"sent_encoded_sha256": "89717d918d5c5c6a80b397c324ba238f09a860d166a105394e17c0df28e91472",
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"trimmed_source_frames": 0
},
"client": {
"active_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"client_id": "sendspin-go-client-id",
"name": "sendspin-go-client",
"supported_roles": [
"player@v1",
"metadata@v1",
"controller@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "aiosendspin",
"initiator_role": "client",
"peer_hello": {
"payload": {
"client_id": "sendspin-go-client-id",
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "sendspin-go Conformance Client",
"software_version": "0.1.0"
},
"name": "sendspin-go-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
]
},
"supported_roles": [
"player@v1",
"metadata@v1",
"controller@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": 24,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 18930
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:18930
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": 120000,
"sent_encoded_sha256": "89717d918d5c5c6a80b397c324ba238f09a860d166a105394e17c0df28e91472",
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"trimmed_source_frames": 0
},
"client": {
"active_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"client_id": "sendspin-go-client-id",
"name": "sendspin-go-client",
"supported_roles": [
"player@v1",
"metadata@v1",
"controller@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "aiosendspin",
"initiator_role": "client",
"peer_hello": {
"payload": {
"client_id": "sendspin-go-client-id",
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "sendspin-go Conformance Client",
"software_version": "0.1.0"
},
"name": "sendspin-go-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
]
},
"supported_roles": [
"player@v1",
"metadata@v1",
"controller@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": 24,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}
INFO:aiohttp.access:127.0.0.1 [16/May/2026:05:35:04 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "Go-http-client/1.1"
Client summary (JSON)
RAW{
"audio": {
"audio_chunk_count": 200,
"received_encoded_sha256": "89717d918d5c5c6a80b397c324ba238f09a860d166a105394e17c0df28e91472",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_id": "sendspin-go-client-id",
"client_name": "sendspin-go-client",
"implementation": "sendspin-go",
"initiator_role": "client",
"peer_hello": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "aiosendspin-server",
"version": 1
},
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "client-initiated-pcm",
"server": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "aiosendspin-server",
"version": 1
},
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": "",
"sample_rate": 8000
}
}Client log
RAW2026/05/16 05:35:04.110694 Connecting to ws://127.0.0.1:18930/sendspin
2026/05/16 05:35:04.128306 Handshake complete with server
2026/05/16 05:35:04.128896 Metadata: - ()
2026/05/16 05:35:04.128924 Group update: id=47fb1c20-6ac7-416e-bc21-238032d62bc3, state=stopped
2026/05/16 05:35:04.257423 Group update: id=47fb1c20-6ac7-416e-bc21-238032d62bc3, state=playing
2026/05/16 05:35:10.010145 Group update: id=47fb1c20-6ac7-416e-bc21-238032d62bc3, state=stopped
2026/05/16 05:35:10.513358 Read error: websocket: close 1000 (normal)
2026/05/16 05:35:10.513620 Connection closed
{
"audio": {
"audio_chunk_count": 200,
"received_encoded_sha256": "89717d918d5c5c6a80b397c324ba238f09a860d166a105394e17c0df28e91472",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_id": "sendspin-go-client-id",
"client_name": "sendspin-go-client",
"implementation": "sendspin-go",
"initiator_role": "client",
"peer_hello": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "aiosendspin-server",
"version": 1
},
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "client-initiated-pcm",
"server": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "aiosendspin-server",
"version": 1
},
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": "",
"sample_rate": 8000
}
}
Server build log · python-adapters · built · 0.07s
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/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-go-client · built · 2.46s
RAWNo build detail was recorded.