A click/pop in transitions on output.ao

[gAlleb]

Not sure about this. Been playing with things and heard a pop/click during transitions.
Happens only with output.ao When running encoded via other outputs everything seems fine.

Track: It's mp3 (changed extension to upload directly) logo3.log

annotate:liq_cue_out=8.2,liq_cross_start_next=6.2,liq_cross_max_start_duration=6.2,liq_cross_end_duration=2.0,liq_cross_start_duration=0.0,liq_fade_out=2.0:/logo3.mp3

radio = playlist(mode="normal",loop=true,"./test.m3u")
radio = crossfade(radio)
output.ao(fallible=true,radio)

And here is the fun part. If we add any other output (output.file,output.icecast) - pop/click disappears while listening to output.ao.

Build-config

 * Liquidsoap version  : rolling-release-v2.3.x-48-g5cb4ad6+dev

 * Compilation options
   - Release build       : false
   - Git SHA             : (none)
   - OCaml version       : 4.14.2
   - OS type             : Unix
   - Libs versions       : angstrom=0.16.1 ao=0.2.4 base=v0.16.3 base.base_internalhash_types=v0.16.3 base.caml=v0.16.3 base.shadow_stdlib=v0.16.3 bigarray=[distributed with Ocaml] bigstringaf=0.10.0 bytes=[distributed with OCaml 4.02 or above] camlp-streams camomile.lib=2.0 cry=1.0.3 curl=0.9.2 domain_shims dtools=0.4.5 dune-build-info=3.17.0 dune-private-libs.dune-section=3.17.0 dune-site=3.17.0 dune-site.private=3.17.0 duppy=0.9.4 ffmpeg-av=1.2.1 ffmpeg-avcodec=1.2.1 ffmpeg-avdevice=1.2.1 ffmpeg-avfilter=1.2.1 ffmpeg-avutil=1.2.1 ffmpeg-swresample=1.2.1 ffmpeg-swscale=1.2.1 fileutils=0.6.4 gen=1.1 lame=0.3.7 liquidsoap-lang=rolling-release-v2.3.x-48-g5cb4ad6 liquidsoap-lang.console=rolling-release-v2.3.x-48-g5cb4ad6 liquidsoap_ao=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_builtins=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_core=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_ffmpeg=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_lame=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_optionals=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_portaudio=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_runtime=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_xmlplaylist=rolling-release-v2.3.x-48-g5cb4ad6-dirty magic-mime=1.3.1 mem_usage=0.1.1 menhirLib=20240715 metadata=0.3.0 mm=0.8.6 mm.audio=0.8.6 mm.base=0.8.6 mm.image=0.8.6 mm.midi=0.8.6 mm.video=0.8.6 portaudio=0.2.3 ppx_compare.runtime-lib=v0.16.0 ppx_hash.runtime-lib=v0.16.0 ppx_sexp_conv.runtime-lib=v0.16.0 re=1.12.0 saturn_lockfree=0.4.1 sedlex=3.3 seq=[distributed with OCaml 4.07 or above] sexplib0=v0.16.0 stdlib-shims=0.3.0 str=[distributed with Ocaml] stringext=1.6.0 threads=[distributed with Ocaml] threads.posix=[internal] unix=[distributed with Ocaml] uri=4.4.0 xml-light=2.5 xmlm=1.4.0 xmlplaylist=0.1.5
   - architecture        : amd64
   - host                : x86_64-apple-darwin22.6.0
   - target              : x86_64-apple-darwin22.6.0
   - system              : macosx
   - ocamlopt_cflags     : -O2 -fno-strict-aliasing -fwrapv -pthread
   - native_c_compiler   : cc -O2 -fno-strict-aliasing -fwrapv -pthread -D_FILE_OFFSET_BITS=64
   - native_c_libraries  : -lm

 * Configured paths
   - mode              : default
   - standard library  : (set by dune-site)
   - scripted binaries : (set by dune-site)
   - rundir            : (set by dune-site)
   - logdir            : (set by dune-site)
   - user cache        : $HOME/.cache/liquidsoap (override with $LIQ_CACHE_USER_DIR)
   - system cache      : (set by dune-site) (override with $LIQ_CACHE_SYSTEM_DIR)
   - camomile files    : (set by dune-site)

 * Supported input formats
   - MP3               : no (requires mad)
   - AAC               : no (requires faad)
   - Ffmpeg            : yes
   - Flac (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Opus              : no (requires opus)
   - Speex             : no (requires speex)
   - Theora            : no (requires theora)
   - Vorbis            : no (requires vorbis)
   - WAV/AIFF          : yes (native)

 * Supported output formats
   - FDK-AAC           : no (requires fdkaac)
   - FFmpeg            : yes
   - MP3               : yes
   - MP3 (fixed-point) : no (requires shine)
   - Flac (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Opus              : no (requires opus)
   - Speex             : no (requires speex)
   - Theora            : no (requires theora)
   - Vorbis            : no (requires vorbis)
   - WAV/AIFF          : yes (native)

 * Tags
   - AAC               : no (requires faad)
   - FFmpeg            : yes
   - FLAC (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Native decoder    : yes
   - Vorbis            : no (requires vorbis)

 * Input / output
   - ALSA              : no (requires alsa)
   - AO                : yes
   - FFmpeg            : yes
   - JACK              : no (requires bjack)
   - NDI               : no (requires ctypes-foreign)
   - OSS               : no (requires oss)
   - Portaudio         : yes
   - Pulseaudio        : no (requires pulseaudio)
   - SRT               : no (requires srt)

 * Audio manipulation
   - FFmpeg            : yes
   - LADSPA            : no (requires ladspa)
   - Lilv              : no (requires lilv)
   - Samplerate        : no (requires samplerate)
   - SoundTouch        : no (requires soundtouch)
   - StereoTool        : no (requires ctypes-foreign)

 * Video manipulation
   - camlimages        : no (requires camlimages)
   - FFmpeg            : yes
   - frei0r            : no (requires frei0r)
   - ImageLib          : no (requires imagelib)
   - SDL               : no (requires tsdl-image & tsdl-ttf)

 * MIDI manipulation
   - DSSI              : no (requires dssi)

 * Visualization
   - GD                : no (requires gd)
   - Graphics          : no (requires graphics)
   - SDL               : no (requires tsdl-image & tsdl-ttf)

 * Additional libraries
   - FFmpeg filters    : yes
   - FFmpeg devices    : yes
   - inotify           : no (requires inotify)
   - irc               : no (requires irc-client-unix)
   - jemalloc          : no (requires jemalloc)
   - lo                : no (requires lo)
   - memtrace          : no (requires memtrace)
   - osc               : no (requires osc-unix)
   - ssl               : no (requires ssl)
   - sqlite3           : no (requires sqlite3)
   - tls               : no (requires tls-liquidsoap)
   - posix-time2       : no (requires posix)
   - windows service   : no (requires winsvc)
   - YAML support      : no (requires yaml)
   - XML playlists     : yes

 * Monitoring
   - Prometheus        : no (requires prometheus)