Pops and clicks on HLS stream

[Oliver-Mardle]

I'm hearing a lot of pops and clicks on my HLS audio stream.

I have attached the Liquidsoap script below. I have tried a variety of different FFMPEG settings, but unfortunately the pops and clicks are still present.
I can record the incoming audio from the sound card with no issues, so I don't think that's the problem. It also doesn't appear to be a clock issue. What can I try next, or could this be a bug in FFMPEG? I'm running the latest versions of both FFMPEG and Liquidsoap.

# Log dir
# log.file.path.set("/var/log/LiquidsoapHLS.log")

#radio = input.pulseaudio(id="AudioRouter", device="HDSPMx01553d", clock_safe=false)
#"alsa_input.pci-0000_01_00.0.multichannel-input"
audio.samplerate := 48000
settings.ffmpeg.log.verbosity := "warning"
settings.decoder.priorities.ffmpeg := 1
settings.decoder.priorities.basic := 1

set("alsa.alsa_buffer", 1920)
set("alsa.buffer_length", 3840)

radio = input.alsa(bufferize=false, device="pcm.RME-0102")
#radio = input.alsa(device="plughw:HDSPMx01553d")
#radio = input.alsa(device="pcm.RMEpb")
radio = mksafe(buffer(radio))
#radio = buffer.adaptative(radio)
#radio = single("/home/npf/apology.mp3")
#radio = input.jack()
#radio = mksafe(radio)

def on_file_change(~state, path)
  print(state)
  print(path)
  process.run("python3 #####################")
  process.run("############################")

end

#aac = %ffmpeg(format="mp4",
#  movflags="+dash+skip_sidx+skip_trailer+frag_custom",
#  frag_duration=5,
#  %audio(
#    codec="aac",
#    channels=2,
#    ar=48000,
#    b="192k"
#  ))

aac = %ffmpeg(format="mpegts",
  %audio(
    codec="aac",
    channels=2,
    ar=48000,
    b="192k",
    profile="aac_low"
))
# .{extra_tags = [time.string("#EXT-X-PROGRAM-DATE-TIME:%Y-%m-%dT%H:%M:%S")]}

streams = [("aac", aac)]

def segment_name(~position,~extname,stream_name) =
  timestamp = time()
  duration = 2
  "#{stream_name}_#{duration}_#{timestamp}_#{position}.#{extname}"
end

o = output.file.hls(playlist="live.m3u8",
  on_file_change=on_file_change,
  persist_at="/tmp/liquidsoap-streams/ENASE/ENASE-State.config",
  #"/tmp/liquidsoap-streams/ENASE",
  "/tmp/liquidsoap-streams/ENASE/stream",
  segment_duration=10.0,
  segments=10,
  segment_name=segment_name,
  streams,
  radio
  )

def onMessageReceived(m) =
  cue = m
  print("Inserting cue point: #{cue}")
  list.iter(fun(s) -> s.insert_tag("#{cue}"), o.streams())
end

osc.on_string("/cues", onMessageReceived)