Case
sendspin-go -> sendspin-jvm
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
sendspin-go
Client
sendspin-jvm
Status
Passed
PCM hashes match exactly
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__server-initiated-pcm__sendspin-go__to__sendspin-jvm",
"client_exit_code": 0,
"client_impl": "sendspin-jvm",
"reason": "PCM hashes match exactly",
"scenario_id": "server-initiated-pcm",
"server_exit_code": 0,
"server_impl": "sendspin-go",
"status": "passed"
}Server summary (JSON)
RAW{
"audio": {
"bit_depth": 16,
"channels": 1,
"clip_seconds": 5,
"duration_seconds": 5,
"fixture": "/Users/runner/work/conformance/conformance/repos/sendspin-cli/tests/fixtures/almost_silent.flac",
"frame_count": 40000,
"sample_rate": 8000,
"sent_audio_chunk_count": 100,
"sent_encoded_byte_count": 80000,
"sent_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e"
},
"client": {
"client_id": "sendspin-jvm-client-id",
"name": "sendspin-jvm-client",
"supported_roles": [
"player@v1",
"metadata@v1",
"artwork@v1",
"controller@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "sendspin-go",
"initiator_role": "server",
"peer_hello": {
"payload": {
"artwork@v1_support": {
"channels": [
{
"format": "jpeg",
"media_height": 256,
"media_width": 256,
"source": "album"
}
]
},
"client_id": "sendspin-jvm-client-id",
"controller@v1_support": {},
"device_info": {
"manufacturer": "conformance",
"product_name": "conformance-client",
"software_version": "1.0"
},
"metadata@v1_support": {},
"name": "sendspin-jvm-client",
"player@v1_support": {
"buffer_capacity": 262144,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 48000
}
]
},
"supported_roles": [
"player@v1",
"metadata@v1",
"artwork@v1",
"controller@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "server-initiated-pcm",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"status": "ok",
"stream": {
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
}Server log
RAW{
"audio": {
"bit_depth": 16,
"channels": 1,
"clip_seconds": 5,
"duration_seconds": 5,
"fixture": "/Users/runner/work/conformance/conformance/repos/sendspin-cli/tests/fixtures/almost_silent.flac",
"frame_count": 40000,
"sample_rate": 8000,
"sent_audio_chunk_count": 100,
"sent_encoded_byte_count": 80000,
"sent_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"source_flac_sha256": "8fdda8244e318c63cd8b699fe461cd7cdddbb729327a0ba00d1bfdbe2192fe17",
"source_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e"
},
"client": {
"client_id": "sendspin-jvm-client-id",
"name": "sendspin-jvm-client",
"supported_roles": [
"player@v1",
"metadata@v1",
"artwork@v1",
"controller@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "sendspin-go",
"initiator_role": "server",
"peer_hello": {
"payload": {
"artwork@v1_support": {
"channels": [
{
"format": "jpeg",
"media_height": 256,
"media_width": 256,
"source": "album"
}
]
},
"client_id": "sendspin-jvm-client-id",
"controller@v1_support": {},
"device_info": {
"manufacturer": "conformance",
"product_name": "conformance-client",
"software_version": "1.0"
},
"metadata@v1_support": {},
"name": "sendspin-jvm-client",
"player@v1_support": {
"buffer_capacity": 262144,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 48000
}
]
},
"supported_roles": [
"player@v1",
"metadata@v1",
"artwork@v1",
"controller@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "pcm",
"role": "server",
"scenario_id": "server-initiated-pcm",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"status": "ok",
"stream": {
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
}
}
Client summary (JSON)
RAW{
"audio": {
"audio_chunk_count": 100,
"received_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_id": "sendspin-jvm-client-id",
"client_name": "sendspin-jvm-client",
"implementation": "sendspin-jvm",
"initiator_role": "server",
"peer_hello": {
"active_roles": [
"player@v1",
"metadata@v1"
],
"connection_reason": "playback",
"name": "sendspin-go server",
"server_id": "sendspin-go-server",
"version": 1
},
"preferred_codec": "pcm",
"role": "client",
"scenario_id": "server-initiated-pcm",
"server": null,
"status": "ok",
"stream": {
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000
}
}Client log
RAWSLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See https://www.slf4j.org/codes.html#noProviders for further details.
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinServerHost: listening on port 19956
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinServerHost: incoming connection from /127.0.0.1:49373
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinServerHost: activating server 'sendspin-go server' (id=sendspin-go-server reason=playback)
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinClient: server hello from 'sendspin-go server' reason=playback
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinClient: stream/start codec=pcm
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinClient: server/state title='Almost Silent'
May 16, 2026 5:35:47 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinClient: first audio chunk — ts=1336261 size=800 bufferSize=0
May 16, 2026 5:35:48 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinServerHost: connection closed (1000 done)
May 16, 2026 5:35:48 AM com.sendspin.protocol.ProtocolLog i
INFO: SendSpinClient: server socket closed (1000 done)
{
"server": null,
"initiator_role": "server",
"role": "client",
"preferred_codec": "pcm",
"stream": {
"codec": "pcm",
"codec_header": null,
"sample_rate": 8000,
"channels": 1,
"bit_depth": 16
},
"peer_hello": {
"active_roles": [
"player@v1",
"metadata@v1"
],
"name": "sendspin-go server",
"connection_reason": "playback",
"server_id": "sendspin-go-server",
"version": 1
},
"implementation": "sendspin-jvm",
"audio": {
"audio_chunk_count": 100,
"received_encoded_sha256": "b3481a3f75dea856a961e7842d12f8344c7147b3925f9f0b67c5445700bd4cf2",
"received_pcm_sha256": "9d447b5b270bc99b45bb9a616937e436c941ca56c477f9cbe16a93275a6b059e",
"received_sample_count": 40000
},
"client_name": "sendspin-jvm-client",
"client_id": "sendspin-jvm-client-id",
"scenario_id": "server-initiated-pcm",
"status": "ok"
}
Server build log · sendspin-go-server · built · 1.01s
RAWNo build detail was recorded.
Client build log · sendspin-jvm-client · built · 77.84s
RAWDownloading https://services.gradle.org/distributions/gradle-9.4.1-bin.zip .............10%.............20%.............30%.............40%.............50%.............60%..............70%.............80%.............90%.............100% Starting a Gradle Daemon (subsequent builds will be faster) > Task :checkKotlinGradlePluginConfigurationErrors SKIPPED > Task :sendspin-protocol:checkKotlinGradlePluginConfigurationErrors SKIPPED > Task :processResources NO-SOURCE > Task :sendspin-protocol:kspKotlin > Task :sendspin-protocol:processResources > Task :sendspin-protocol:compileKotlin > Task :sendspin-protocol:compileJava NO-SOURCE > Task :sendspin-protocol:classes > Task :sendspin-protocol:jar > Task :compileKotlin > Task :compileJava NO-SOURCE > Task :classes UP-TO-DATE > Task :jar [Incubating] Problems report is available at: file:///Users/runner/work/conformance/conformance/adapters/sendspin-jvm/client/build/reports/problems/problems-report.html Deprecated Gradle features were used in this build, making it incompatible with Gradle 10. You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins. For more on this, please refer to https://docs.gradle.org/9.4.1/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation. BUILD SUCCESSFUL in 1m 15s 6 actionable tasks: 6 executed Consider enabling configuration cache to speed up this build: https://docs.gradle.org/9.4.1/userguide/configuration_cache_enabling.html