Hello all,
Currently i am running liquidsoap 1.0.1 on debian 7 64-bit.
My basic script is running just fine, playing out some 90S Dance Tracks
for testing stuff etc.
I used the complete case analysis script found on the liquidsoap
homepage as a starting reference.
I am fine with the audiosettings for the most part and am especially
glad that i can use the calf multiband-compressor thanks to kxstudio and
falkTX.
This saves me 5% of cpu load for the multibandcompression alone.
Being 100% visually impaired and getting more and more dissatisfied with
the growing inaccessibility of gui-driven radio automation software i am
all the more happy to have liquidsoap available for my needs.
I am a total beginner in liquidsoap and not yet fully into the inner
workings and the possibilities of this programming language. So
naturally i would be stuck at some point and this is where i'd be asking
for help right now.
Knowing that there is a sidechain-compressor available in my
ladspa-plugincollection i wonder if i could build some talkover-effect
found on several dj-mixers, so that whenever i connect my microphone
over a harbor input the music will be ducked whenever i speak. This is
good for playing out the usual trance-dj-sessions. So all i had to do is
to feed my microphone harbor-input into my sidechain compressor and
because the 2 streams from my playlist are mixed together, the
microphone is able to influence the volume of the playing music.
Is there any break in the music-stream when the mic-harbor-input
connects and disconnects, since i might not be available all the time,
and would like to leave the stream doing it's job on it's own.
But i don't know how to go about it. The next problem is the 10 seconds
bufferdelay from the stream to the end listener which makes realtime
monitoring nearly impractical, since my linux-box is colocated in berlin
and i'm residing in esslingen close to stuttgart most of the time. Maybe
some lowlatency speex-output for testing and nearly-realtime monitoring
except for a 1 to 2 seconds delay, which would be acceptable to me.
Does anybody know about the meaning of the ladspa-compressor-parameters?
It seems to me the treshold-parameter isn't expressed in decibel. Anyway
i even have a hard time understanding some of my multiband-compressors
parameters because of this.
Any Ideas? This would be really great.
I will attach my script below as a quick reference for you to know where
i am at right now.
Sensible data has been exchanged with meaningless parameters. Passwort
etc...
Thanks and best Regards, Attila.
#!/usr/bin/liquidsoap
# Lines starting with # are comments, they are ignored.
# Put the log file in some directory where
# you have permission to write.
set("log.file.path","/tmp/<script>.log")
# Print log messages to the console,
# can also be done by passing the -v option to liquidsoap.
set("log.stdout", false)
# Use the telnet server for requests
set("server.telnet", true)
# A bunch of files and playlists,
# supposedly all located in the same base dir.
default = single("/home/mp3/fallback/default.ogg")
day = playlist("/home/mp3/day/")
night = playlist("/home/mp3/night/")
jingles = playlist("/home/mp3/jingles/")
# clock = single("/home/mp3/fallback/clock.ogg")
# start = single("/home/mp3/fallback/start.ogg")
# stop = single("/home/mp3/fallback/stop.ogg")
# Play user requests if there are any,
# otherwise one of our playlists,
# and the default file if anything goes wrong.
radio = fallback([ request.queue(id="request"),
switch([({ 6h-22h }, day),
({ 22h-6h }, night)]),
default])
# Metadata rewriting to show Station Infos and no Artist/title-infos.
radio =
rewrite_metadata([
("artist", "meinprivatesradio"),
("album", ""),
("date", ""),
("genre", "diverse"),
("title","Wir spielen, was Ihr hoeren wollt!"),
("comment","http://www.meinprivatesradio.de";)],
strip=true,radio)
# smart crossfading
# first generate our custom Fading Function
def my_fade
(~start_next=3.,~fade_in=3.,~fade_out=3.,~width=1.,~conservative=true,s)
mf_high = 20.
mf_medium = 32.
mf_margin = 4.
fade.out = fade.out(duration=fade_out)
fade.in = fade.in(duration=fade_in)
add = fun (from,to) ->
add(normalize=false,
[ to,from ])
log = log(label="my_fade")
def transition (a, b, ma, mb, sa, sb)
if
(a + mf_high >= 0. and b + mf_high >= 0.) or
(a + mf_medium >= 0. and b + mf_medium >= 0. and abs(a - b) <= mf_margin)
then
log("No transition, just sequencing.")
sequence([sa, sb])
elsif
a + mf_medium <= 0. and b + mf_medium >= 0. and abs(a - b) <= mf_margin
then
log("Using transition 1: crossed.")
add(fade.out(sa),fade.in(sb))
elsif
b >= a + mf_margin and a <= mf_high
then
log("Using transition 2: crossed, fade-out.")
add(fade.out(sa),sb)
elsif
a >= b + mf_margin and b <= mf_high
then
log("Using transition 3: crossed, fade-in.")
add(sa,fade.in(sb))
else
log("Using transition 4: crossed, fade-in, fade-out.")
add(fade.out(sa),fade.in(sb))
end
end
smart_cross(transition,width=width,duration=start_next,conservative=conservative,s)
end
# process this function within our stream
radio = my_fade(radio)
# Add the normal jingles
radio = random(weights=[1,5],[ jingles, radio ])
# And the clock jingle
# radio = add([radio, switch([({0m0s},clock)])])
# Add the ability to relay live shows
full =
fallback(track_sensitive=false,
[input.harbor("live",port=9001,password="dukommsthiernetrein"),
radio])
## Audio processing
# Tap Equalizer to pump up and brighten up the sound
full = ladspa.tap_equalizer (
band_1_gain = 2.0,
band_6_gain = 2.0,
band_7_gain = 3.0,
full)
# old custom Function for Multiband-compression.
# will be phased out, for it's extraordinarily cpu-intensive.
# Instead we'll be using the falkTX/calf githup repo's ladspa libraries
so we have the calf multiband-compressor available.
# Shouldn't be so demanding on cpu resources and gives more clean and
understandable Code.
# the old one sounded crappy anyway.
#def multicomp(s)
# 3-band crossover
# low = filter.iir.eq.low(frequency = 130.)
# mh = filter.iir.eq.high(frequency = 70.)
# mid = filter.iir.eq.low(frequency = 7400.)
# high = filter.iir.eq.high(frequency = 350.)
# Add back
# add(normalize = false,
# [ compress(attack = 10., release = 20., threshold = -12.,
# ratio = 2., gain = 2.0, knee = 0.3,
# low(s)),
# compress(attack = 10., release = 20., threshold = -28.,
# ratio = 5., gain = 4.0, knee = 1.3,
# mid(mh(s))),
# compress(attack = 5., release = 10., threshold = -22.,
# ratio = 5., gain = 5.0, knee = 0.3,
# high(s))
# ])
# end
# Use bandpass filter to narrow signal to 30-15000 Hz for FM broadcast
full = filter.iir.butterworth.bandpass(
frequency1 = 30.0,
frequency2 = 15000.0,
order = 4,
full
)
# apply our custom multiband compressor
# full = multicomp(full)
# Gate to stop Background noise during quiet times
full = ladspa.gate(
full,
threshold = -50.0,
attack = 0.15,
)
# maybe it's gonna get grovier with the ladspa bassenhancer
# commented out until i know how to use it properly.
# full = ladspa.bassenhancer(full,
# amount=5.,floor_active=true,
# input=1.,output=1.,)
# apply the Calf Multiband Compressor
# puh, lot's of parameters to tweak!
full = ladspa.multibandcompressor(
bypass=false,
input=1.,
output=1.,
split_1_2=140.,
split_2_3=1500.,
split_3_4=7000.,
s1=-0.25,
s2=-0.136,
s3=-0.148,
q1=0.90,
q2=0.90,
q3=0.90,
threshold_1=0.211,
ratio_1=6.5,
attack_1=50.,
release_1=100.,
makeup_1=2.,
knee_1=1.,
detection_1=1,
bypass_1=false,
threshold_2=0.300,
ratio_2=2.5,
attack_2=70.,
release_2=150.,
makeup_2=1.,
knee_2=3.,
detection_2=1,
bypass_2=false,
threshold_3=0.260,
ratio_3=2.5,
attack_3=70.,
release_3=150.,
makeup_3=1.,
knee_3=3.,
detection_3=1,
bypass_3=false,
threshold_4=0.145,
ratio_4=1.9,
attack_4=10.,
release_4=20.,
makeup_4=1.9,
knee_4=2.,
detection_4=1,
bypass_4=false,
full
)
# Overall Compressor -LS's single band compressor using a harder ratio,
fast attack and mainly RMS based calc.
full = compress(
full,
attack = 1.0,
gain = 2.0,
knee = 1.0,
ratio = 5.0,
release = 2.0,
threshold = -3.0,
rms_window = 0.9
)
# Limiter - scaling limiter with good artifact rejection
full = ladspa.tap_limiter(
full,
limit_level = -1.5
)
# Final Hard Limiter - keeps level from causing over mod. in worst case.
EXTREMELY peak based calc.
full = limit(
full,
threshold = -0.1,
attack = 2.0,
release = 25.0,
rms_window = 0.02
)
# Output the full stream in OGG and MP3
# mp3-stream will not be affected by dsp for listening tests.
output.icecast(%mp3,
host="localhost",port=23456,password="dukommsthiernetrein",
mount="radio",radio)
output.icecast(%vorbis,
host="localhost",port=23456,password="dukommsthiernetrein",
mount="radio.ogg",full)
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