Case
aiosendspin -> sendspin-go
Start the server first, then the client. The server opts into aiosendspin's non-spec unencrypted transition mode (allow_unencrypted) rather than the real encrypted Noise handshake, to keep tracking the plaintext legacy path used by implementations that have not yet adopted the spec's mandatory encryption. This scenario is expected to be dropped once every tracked implementation supports the real handshake.
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__server-initiated-legacy-unencrypted__aiosendspin__to__sendspin-go",
"client_exit_code": 0,
"client_impl": "sendspin-go",
"reason": "PCM hashes match exactly",
"scenario_id": "server-initiated-legacy-unencrypted",
"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"
],
"client_id": "sendspin-go-client-id",
"name": "sendspin-go-client",
"supported_roles": [
"player@v1"
]
},
"discovery_method": "registry_fallback",
"implementation": "aiosendspin",
"initiator_role": "server",
"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"
],
"trust_level": "none",
"unpaired_access": {
"enabled": false
},
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "server-initiated-legacy-unencrypted",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"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 19082
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:19082
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.
WARNING:aiosendspin.server.connection.unknown-client:Accepting unencrypted legacy connection (transition mode)
WARNING:aiosendspin.server.client.sendspin-go-client-id:non-compliant client: initial client/state omitted the required 'available' field
WARNING:aiosendspin.server.client.sendspin-go-client-id:non-compliant client: initial client/state omitted required player timing fields
WARNING:aiosendspin.server.client.sendspin-go-client-id:non-compliant client: initial client/state omitted muted despite declaring the mute command
WARNING:aiosendspin.server.client.sendspin-go-client-id:non-compliant client: client/state used legacy player.state instead of top-level available
{
"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"
],
"client_id": "sendspin-go-client-id",
"name": "sendspin-go-client",
"supported_roles": [
"player@v1"
]
},
"discovery_method": "registry_fallback",
"implementation": "aiosendspin",
"initiator_role": "server",
"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"
],
"trust_level": "none",
"unpaired_access": {
"enabled": false
},
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "server-initiated-legacy-unencrypted",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}
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": "server",
"peer_hello": {
"payload": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"version": 1
},
"type": "server/hello"
},
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "server-initiated-legacy-unencrypted",
"server": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"version": 1
},
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": "",
"sample_rate": 8000
}
}Client log
RAW2026/09/05 06:56:01.875665 Handshake complete with server
2026/09/05 06:56:01.876530 Group update: id=3281f66b-ef52-4171-9e52-f98802b7aadb, state=stopped
2026/09/05 06:56:02.003861 Group update: id=3281f66b-ef52-4171-9e52-f98802b7aadb, state=playing
2026/09/05 06:56:07.749437 Group update: id=3281f66b-ef52-4171-9e52-f98802b7aadb, state=stopped
2026/09/05 06:56:08.253719 Read error: websocket: close 1000 (normal)
2026/09/05 06:56:08.253879 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": "server",
"peer_hello": {
"payload": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"version": 1
},
"type": "server/hello"
},
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "server-initiated-legacy-unencrypted",
"server": {
"active_roles": [
"player@v1"
],
"connection_reason": "playback",
"name": "aiosendspin server",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"version": 1
},
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": "",
"sample_rate": 8000
}
}
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-go-client · built · 1.91s
RAWNo build detail was recorded.