Case
aiosendspin -> aiosendspin
Start the server first, then the client. The server emits PCM in the 24-bit packed wire format (3-byte packed, little-endian, two's complement). The client advertises a listener and 24-bit PCM as its only supported audio format. The matrix compares canonical PCM hashes after the client unpacks the 24-bit stream. A client SDK with no 24-bit decode path misreads the bytes and produces a hash mismatch. The matrix also verifies that the negotiated stream was 24-bit, because a 16-bit stream of the same clip yields the same canonical hash without exercising the 24-bit path.
Server
aiosendspin
Client
aiosendspin
Status
Passed
PCM hashes match exactly
Server activation
Initial server/activate
What the aiosendspin server's own adapter recorded for its first server/activate on this connection, reported as sent. The case fails when none was sent, when its activities are not unique values from playback and pairing, or when it omits active_roles. Nothing else in it is checked against the specification: which activities and roles the matched PSK allows is not judged. A recording that cannot be read as that message is shown whole and not judged either.
Server group state
Every group/update after activation
What the aiosendspin server's own adapter recorded for each group/update it sent after its first server/activate on this connection, in order and reported as sent. The case fails when none followed, or when in any of them playback_state is not playing or stopped, or group_id or group_name is missing or not a string. How soon the first followed is not judged, because the specification says promptly and gives no bound, so one sent at any point in the case counts. Whether a change to a field produced a further message is not judged either. A recording of anything other than that message is shown whole and fails the case as a harness gap.
1 of 3
2 of 3
3 of 3
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__server-initiated-pcm-24bit__aiosendspin__to__aiosendspin",
"client_exit_code": 0,
"client_impl": "aiosendspin",
"reason": "PCM hashes match exactly",
"scenario_id": "server-initiated-pcm-24bit",
"scenario_revision": 7,
"server_exit_code": 0,
"server_impl": "aiosendspin",
"status": "passed",
"unsupported": false
}Server summary (JSON)
RAW{
"activation": {
"payload": {
"active_roles": [
"player@v1"
],
"activities": [
"playback"
]
},
"type": "server/activate"
},
"audio": {
"bit_depth": 24,
"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
},
"availability_trace": [
{
"available": false,
"type": "client/state"
},
{
"available": true,
"type": "client/state"
},
{
"phase": "sending",
"roles": [
"player"
],
"type": "stream/start"
},
{
"phase": "sent",
"roles": [
"player"
],
"type": "stream/start"
}
],
"client": {
"active_roles": [
"player@v1"
],
"client_id": "rFgILqo5YfPor8oK13GTFmECUaxYcW46Q1TFv8F38Xg",
"name": "aiosendspin-client",
"supported_roles": [
"player@v1"
]
},
"discovery_method": "registry_fallback",
"group_updates": [
{
"payload": {
"group_id": "9fc16200-64ef-4e5c-ba5f-461767e046f5",
"group_name": "aiosendspin-client",
"playback_state": "stopped"
},
"type": "group/update"
},
{
"payload": {
"group_id": "9fc16200-64ef-4e5c-ba5f-461767e046f5",
"group_name": "aiosendspin-client",
"playback_state": "playing"
},
"type": "group/update"
},
{
"payload": {
"group_id": "9fc16200-64ef-4e5c-ba5f-461767e046f5",
"group_name": "aiosendspin-client",
"playback_state": "stopped"
},
"type": "group/update"
}
],
"implementation": "aiosendspin",
"initiator_role": "server",
"peer_hello": {
"payload": {
"name": "aiosendspin-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_formats": [
{
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
]
},
"supported_pair_methods": {
"pairing_psk": {}
},
"supported_roles": [
"player@v1"
],
"unpaired_access": {
"enabled": true
}
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "server-initiated-pcm-24bit",
"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
},
"time_exchange": [
{
"payload": {
"client_transmitted": 984752729
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 984752729,
"server_received": 984759946,
"server_transmitted": 984763205
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 984954654
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 984954654,
"server_received": 984955269,
"server_transmitted": 984955676
},
"type": "server/time"
},
{
"type": "other-sent"
},
{
"payload": {
"client_transmitted": 985034447
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 985034447,
"server_received": 985034763,
"server_transmitted": 985034909
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 985157055
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 985157055,
"server_received": 985157406,
"server_transmitted": 985157598
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 988158544
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 988158544,
"server_received": 988159158,
"server_transmitted": 988159511
},
"type": "server/time"
},
{
"type": "other-sent"
},
{
"payload": {
"client_transmitted": 991168690
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 991168690,
"server_received": 991169359,
"server_transmitted": 991169734
},
"type": "server/time"
}
]
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 19023
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:19023
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.
{
"activation": {
"payload": {
"active_roles": [
"player@v1"
],
"activities": [
"playback"
]
},
"type": "server/activate"
},
"audio": {
"bit_depth": 24,
"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
},
"availability_trace": [
{
"available": false,
"type": "client/state"
},
{
"available": true,
"type": "client/state"
},
{
"phase": "sending",
"roles": [
"player"
],
"type": "stream/start"
},
{
"phase": "sent",
"roles": [
"player"
],
"type": "stream/start"
}
],
"client": {
"active_roles": [
"player@v1"
],
"client_id": "rFgILqo5YfPor8oK13GTFmECUaxYcW46Q1TFv8F38Xg",
"name": "aiosendspin-client",
"supported_roles": [
"player@v1"
]
},
"discovery_method": "registry_fallback",
"group_updates": [
{
"payload": {
"group_id": "9fc16200-64ef-4e5c-ba5f-461767e046f5",
"group_name": "aiosendspin-client",
"playback_state": "stopped"
},
"type": "group/update"
},
{
"payload": {
"group_id": "9fc16200-64ef-4e5c-ba5f-461767e046f5",
"group_name": "aiosendspin-client",
"playback_state": "playing"
},
"type": "group/update"
},
{
"payload": {
"group_id": "9fc16200-64ef-4e5c-ba5f-461767e046f5",
"group_name": "aiosendspin-client",
"playback_state": "stopped"
},
"type": "group/update"
}
],
"implementation": "aiosendspin",
"initiator_role": "server",
"peer_hello": {
"payload": {
"name": "aiosendspin-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_formats": [
{
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
]
},
"supported_pair_methods": {
"pairing_psk": {}
},
"supported_roles": [
"player@v1"
],
"unpaired_access": {
"enabled": true
}
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "server-initiated-pcm-24bit",
"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
},
"time_exchange": [
{
"payload": {
"client_transmitted": 984752729
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 984752729,
"server_received": 984759946,
"server_transmitted": 984763205
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 984954654
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 984954654,
"server_received": 984955269,
"server_transmitted": 984955676
},
"type": "server/time"
},
{
"type": "other-sent"
},
{
"payload": {
"client_transmitted": 985034447
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 985034447,
"server_received": 985034763,
"server_transmitted": 985034909
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 985157055
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 985157055,
"server_received": 985157406,
"server_transmitted": 985157598
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 988158544
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 988158544,
"server_received": 988159158,
"server_transmitted": 988159511
},
"type": "server/time"
},
{
"type": "other-sent"
},
{
"payload": {
"client_transmitted": 991168690
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 991168690,
"server_received": 991169359,
"server_transmitted": 991169734
},
"type": "server/time"
}
]
}
Client summary (JSON)
RAW{
"audio": {
"audio_chunk_count": 200,
"received_encoded_sha256": "89717d918d5c5c6a80b397c324ba238f09a860d166a105394e17c0df28e91472",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_id": "rFgILqo5YfPor8oK13GTFmECUaxYcW46Q1TFv8F38Xg",
"client_name": "aiosendspin-client",
"implementation": "aiosendspin",
"initiator_role": "server",
"peer_hello": null,
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "server-initiated-pcm-24bit",
"server": null,
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}Client log
RAWINFO:aiosendspin.client.listener:ClientListener started on port 20023, path /sendspin
INFO:aiosendspin.client.connection:Stream started with codec pcm
INFO:aiohttp.access:127.0.0.1 [21/Oct/2026:07:25:01 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "Python/3.12 aiohttp/3.14.5"
INFO:aiosendspin.client.listener:ClientListener stopped
{
"audio": {
"audio_chunk_count": 200,
"received_encoded_sha256": "89717d918d5c5c6a80b397c324ba238f09a860d166a105394e17c0df28e91472",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_id": "rFgILqo5YfPor8oK13GTFmECUaxYcW46Q1TFv8F38Xg",
"client_name": "aiosendspin-client",
"implementation": "aiosendspin",
"initiator_role": "server",
"peer_hello": null,
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "server-initiated-pcm-24bit",
"server": null,
"status": "ok",
"stream": {
"bit_depth": 24,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}
Shared build log · python-adapters · built · 0.24s
RAW.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/audio_transformers.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/capabilities.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/events.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/group.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/types.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/v1.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/registry.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/scheduled_state.py'... Listing 'src/conformance/_vendor/aiosendspin/server/roles/source'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/__init__.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/events.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/stream.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/v1.py'... Listing 'src/conformance/_vendor/aiosendspin/server/roles/visualizer'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/__init__.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/features.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/group.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/packing.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/types.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/v1.py'... Listing 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/__init__.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/features.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/packing.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/role.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/server.py'... Compiling 'src/conformance/_vendor/aiosendspin/util.py'... 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/cli.py'... Compiling 'src/conformance/flac.py'... Compiling 'src/conformance/merge.py'... Compiling 'src/conformance/pcm.py'... Compiling 'src/conformance/registry.py'... Listing 'src/conformance/validator'... Compiling 'src/conformance/validator/__init__.py'... Compiling 'src/conformance/validator/checks.py'... Compiling 'src/conformance/validator/cli.py'... Compiling 'src/conformance/validator/code_pairing.py'... Compiling 'src/conformance/validator/code_pairing_checks.py'... Compiling 'src/conformance/validator/discovery.py'... Compiling 'src/conformance/validator/findings.py'... Compiling 'src/conformance/validator/noncompliance_refs.py'... Compiling 'src/conformance/validator/prompter.py'... Compiling 'src/conformance/validator/recorder.py'... Compiling 'src/conformance/validator/report.py'... Compiling 'src/conformance/validator/session.py'... Compiling 'src/conformance/validator/storage.py'... Compiling 'src/conformance/validator/suite_checks.py'... Compiling 'src/conformance/validator/suites.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'... Compiling 'scripts/vendor_aiosendspin.py'...