Test how Liquidsoap live audio/analog line-in behaves using a dedicated PCM device configuration

changed milestone to %1.0-alpha2 — Precise Pheasant

added P2 discuss labels

assigned to @david

marked this issue as related to engine-recorder#10 (closed)

changed the description

marked this issue as related to engine-recorder#6 (closed)

marked this issue as related to #32 (closed)

marked this issue as related to #33 (closed)

mentioned in commit 4d195567

added To Do label

removed To Do label

marked this issue as related to engine-recorder#16 (closed)

With my current setup (see .env) I have no issues with my audio output at all. As my output device I use a YAMAHA AG06 MK2. My asound.conf looks like this:

pcm.aura_engine {
  type plug
  slave { pcm "hw:CARD=AG06MK2,DEV=0" }
}

pcm.aura_recorder {
  type plug
  slave { pcm "pcm.aura_engine" }
}

I do run into issues when using a input device (AURA_ENGINE_INPUT_DEVICE=someotheraudiodevice). @david I am thinking about testing this with just liquidsoap. Do you have some thoughts on what the simplest liquidsoap script could be to test this?

I did test all this on 1.0.0-alpha1 with docker compose.

My .env file:


# Released versions of the Docker images
AURA_ENGINE_VERSION=1.0.0-alpha1
AURA_ENGINE_API_VERSION=1.0.0-alpha1
AURA_ENGINE_CORE_VERSION=1.0.0-alpha1
# Version of postgres. Defaults to 14
# POSTGRES_VERSION=14


### GENERAL

# Timezone
TIMEZONE=Europe/Vienna

# Folder to store service log files
AURA_LOGS=../../logs

# Folder holding audio sources provided by Tank (absolute path)
AURA_AUDIO_STORE_SOURCE=../../audio/source
# Folder holding M3U Playlists
AURA_AUDIO_STORE_PLAYLIST=../../audio/playlist
# Folder holding audio for fallback scenarios
AURA_AUDIO_STORE_FALLBACK=../../audio/fallback
# Folder holding audio block recordings
AURA_AUDIO_STORE_RECORDINGS=../../audio


### ENGINE

# Possible values: debug, info, warning, error, critical
AURA_ENGINE_LOG_LEVEL=debug
# Database for caching scheduling data
AURA_ENGINE_DB_HOST=engine-postgres
AURA_ENGINE_DB_NAME=aura_engine
AURA_ENGINE_DB_USER=aura_engine
AURA_ENGINE_DB_PASS=passwd
# API
AURA_ENGINE_API_BASE_URL=http://engine-api:8008/
AURA_STEERING_BASE_URL=http://steering:8000/
AURA_TANK_BASE_URL=http://tank:8040/
AURA_TANK_ENGINE_PASSWORD=passwd
# Details for the Station Fallback i.e. the default show when nothing is scheduled
AURA_ENGINE_FALLBACK_SHOW_NAME=PLAYLOG_TEST
AURA_ENGINE_FALLBACK_SHOW_ID=666
# Offset in seconds how long it takes for Liquidsoap to actually execute a scheduler command; Crucial to keep things in sync
AURA_ENGINE_LATENCY_OFFSET=0.5
# Fade duration when selecting another mixer input (seconds)
AURA_ENGINE_FADE_IN_TIME=1.5
AURA_ENGINE_FADE_OUT_TIME=1.5
# Host and UDP port where heartbeat is sent to (disabled if empty string)
# Seconds how often the vitality of Engine Core should be checked (default=1)
AURA_ENGINE_HEARTBEAT_SERVER=
AURA_ENGINE_HEARTBEAT_SERVER_PORT=43334
AURA_ENGINE_HEARTBEAT_FREQUENCY=1


### ENGINE API

# Possible values: debug, info, warning, error, critical
AURA_ENGINE_API_LOG_LEVEL=debug
# Configure the database for engine-api
AURA_ENGINE_API_DB_NAME=aura_engine_api
AURA_ENGINE_API_DB_USER=aura_engine_api
AURA_ENGINE_API_DB_PASS=passwd
# Set the URL engine-api should bind to. Note that setting this to 0.0.0.0:8008 would make engine-api globally accessible. You probably want to set this to a private network.
AURA_ENGINE_API_BIND_URL=0.0.0.0:8008


### ENGINE CORE

# Audio Device Settings
AURA_ENGINE_OUTPUT_DEVICE=pcm.aura_engine
AURA_ENGINE_INPUT_DEVICE=
# Fallback Settings
AURA_ENGINE_FALLBACK_TYPE=folder
AURA_ENGINE_FALLBACK_FOLDER_RELOAD=300
AURA_ENGINE_FALLBACK_MAX_BLANK=15.
AURA_ENGINE_FALLBACK_MIN_NOISE=0.
AURA_ENGINE_FALLBACK_THRESHOLD=-80.
# Misc Settings
AURA_ENGINE_CORE_LOG_LEVEL=5
AURA_ENGINE_FRAME_SAMPLERATE=
AURA_ENGINE_FRAME_DURATION=
AURA_ENGINE_FRAME_SIZE=
AURA_ENGINE_API_URL_PLAYLOG=http://engine-api:8008/api/v1/playlog
# Telnet Settings
AURA_ENGINE_TELNET_ENABLE=true
AURA_ENGINE_TELNET_HOST=0.0.0.0
AURA_ENGINE_TELNET_PORT=1234
AURA_ENGINE_TELNET_SERVER_TIMEOUT=16380
# Stream Input Settings
AURA_ENGINE_STREAM_INPUT_MAX_BUFFER=5.0
AURA_ENGINE_STREAM_INPUT_TIMEOUT=10.0
# Stream Output Settings
AURA_ENGINE_STREAM_OUTPUT_ENABLE=false
AURA_ENGINE_STREAM_OUTPUT_ENCODING=ogg
AURA_ENGINE_STREAM_OUTPUT_BITRATE=128
AURA_ENGINE_STREAM_OUTPUT_CHANNELS=2
AURA_ENGINE_STREAM_OUTPUT_HOST=localhost
AURA_ENGINE_STREAM_OUTPUT_PORT=8888
AURA_ENGINE_STREAM_OUTPUT_USER=source
AURA_ENGINE_STREAM_OUTPUT_PASSWORD=source
AURA_ENGINE_STREAM_OUTPUT_MOUNTPOINT=aura-radio.ogg
AURA_ENGINE_STREAM_OUTPUT_NAME=AURA.radio
AURA_ENGINE_STREAM_OUTPUT_URL=https://aura.radio
AURA_ENGINE_STREAM_OUTPUT_DESCRIPTION=Music from the community radio software suite
AURA_ENGINE_STREAM_OUTPUT_GENRE=music

### ENGINE RECORDER

# Set an ALSA audio device or HTTP audio stream
AURA_ENGINE_RECORDER_AUDIO_DEVICE=pcm.aura_recorder
# audio codec format, for example "pcm_s32le"
AURA_ENGINE_RECORDER_SAMPLE_FORMAT=
# sampling rate, for example 44100
AURA_ENGINE_RECORDER_SAMPLE_RATE=
# time length of one recording block in seconds, for example 1800
AURA_ENGINE_RECORDER_SEGMENT_LENGTH=1800
# name of the segment, for example "%Y-%m-%d_%H:%M:%S_%s"
AURA_ENGINE_RECORDER_SEGMENT_STRING_FORMAT=%Y-%m-%d_%H:%M:%S
# set to true if you want to sync the content of AURA_AUDIO_STORE/recordings/block to somewhere else
AURA_ENGINE_RECORDER_SYNC=False
# the destination where we sync to, this can be a remote location. If you chose a remote location
# make sure that you supply a sshkey, otherwise the script will ask you for your password every
# day
# for example user@remote_server:/tmp/audio
# AURA_ENGINE_RECORDER_SYNC_DESTINATION=/tmp
# the options with which we start rsync. They are not allowed to have spaces in between them
# for example "-a" or "-apogt"
# AURA_ENGINE_RECORDER_SYNC_OPTIONS=-a
# set to True if you want to delete audio files older than X days
AURA_ENGINE_RECORDER_DELETE=False
# AURA_ENGINE_RECORDER_DELETE_OLDER_THAN=7

AURA_ENGINE_RECORDER_LOG_LEVEL=INFO

### DEVELOPMENT ###

# If you want to use a dev-setup, which exposes some more ports
# and builds the containers locally, uncomment the following
# line
# COMPOSE_FILE=docker-compose.yml:docker-compose.dev.yml

I do run into issues when using a input device

Thanks a lot for testing. Please note this ticket is only about live audio/analog line-in. Line-out is working in my experience without a glitch.

For line-in, it is very important to find the correct settings for your device. Every device has their own native settings which work best. Here in the section "detecting the correct frame size" are some ideas, to come close to them. This is more a trial an error approach and for sure not ideal.

Try a basic liquidsoap script with line-in and tune it's settings. For example test_alsa_framesize.liq.
Then I suggest to try the settings natively in Engine Core, without Docker, to ensure there are no latency issues due to Docker. The relevant settings in engine.ini to tune your device is in the [audio] section.
Now you could give it a try with Docker

As discussed with you @Loxbie I'm assigning this ticket now to you.

changed title from Test how Liquidsoap live audio behaves using a dedicated PCM device configuration to Test how Liquidsoap live audio/analog line-in behaves using a dedicated PCM device configuration

assigned to @Loxbie and unassigned @david

added 1 deleted label

added To Do label

changed milestone to %1.0-alpha3 — Playful Platypus

mentioned in issue #50 (closed)

@Loxbie Have you tried this with Liqudisoap or engine-core only?

For further testing I suggest this approach, as outlined in the parent epic:

Testing Liquidsoap analog input behaviour, on different levels:

ALSA configuration, different types of virtual and hardware devices, and their settings

Simple, pure Liquidsoap script, trying different settings for buffer, clocks etc.

Engine Core native

Engine Core Docker

Ticket Test Liquidsoap & Engine Core with the Hardware... (#32 - closed) is related and can also support the testing process.

Test how Liquidsoap live audio/analog line-in behaves using a dedicated PCM device configuration

Parent: [EPIC] Smooth play-out latency and buffering fo... (#50 - closed)

Suggested testing approach

Designs

Child items ...

Activity