Re: [ecasound] starting ecasound at boot, in a terminal window

Well, this is a cool idea, thanks! So it would look for audio until we
either play a movie or start playing the piano, and then execute the proper
crossover script and exit, right?

I hear some folks saying how Linux is a bad situation for musicians (too
much fiddling required), but I just doubt if one has this kind of
flexibility so easily, with Windows and J. Rivers...
I will try it... thanks again!
John

On Mon, Jun 26, 2017 at 3:50 PM, Joel Roth <joelz@email-addr-hidden> wrote:

> john gibby wrote:
> > I read that carefully Joel, very interesting. Will follow what you send
> > next... :)
>
> Hi John,
>
> Here is a simple script that exits saying "found audio!"
> when audio is substantially present at ALSA soundcard channel 1.
> It simply spawns a new copy of Ecasound every 2s.
>
> This, or something like it, could drive your configuration
> switching.
>
> Have a nice day!
>
> Joel
>
> --
>
> #!/usr/bin/env perl
> use 5.014;
> use strict;
> use warnings;
> while (1){
> my $command = 'ecasound -i alsa,default -ev -t 2 -o null';
> #my $command = 'ecasound -i:select,10,30,/home/jroth/music/tmh.wav
> -ev -t 2 -o null';
> open my $fh, "-|", $command;
> my $rx = qr/Pos\s+-([123])0dB:[_ ]+(\d+)/;
> my $count = 0;
> my $matches;
> while (<$fh>){
> chomp;
> next unless my($n, $ch1) = /$rx/;
> say STDERR;
> $count += $ch1;
> }
> #say $count;
>
> say("found audio!"), exit if $count > 5000;
> }
>
> __END__
>
> 40k samples for one channel, 2s of mild organ music
> 13k samples for one channel, 2s of low voice continuuous into mike
>
>
> __DATA__
> Pos -10dB: __206742 __280703
> Pos -20dB: _1177971 _1203440
> Pos -30dB: _1035427 __988797
>
>
>
>
> > On Tue, Jun 20, 2017 at 6:00 AM, Joel Roth <joelz@email-addr-hidden> wrote:
> >
> > > john gibby wrote:
> > > > I have one chainsetup for watching movies, and a different one for
> my
> > > > Pianoteq piano application (included below). I would like the piano
> > > > crossover to come up automatically when I start the computer, but I
> want
> > > it
> > > > to be convenient to change the chainsetup, for when we want to watch
> a
> > > > movie.
> > >
> > >
> > > Hi,
> > >
> > > First, thanks for this application example, which is to
> > > switch between to Ecasound setups, possibly sensing a signal
> > > in a priority input channel and switching over to that
> > > channel when an audio source is present.
> > >
> > > I have been looking into how near this application would be
> > > possible under Nama, which aspires to be a sort of Bat
> > > Utility Belt for audio processing with Ecasound.
> > >
> > > To start with, I ported John's Ecasound chain setup to Nama
> > > commands, omitting the presets and replacing the chorder
> > > operators with Nama's routing conventions. That's all
> > > I'll cover in this posting.
> > >
> > > Here's his setup:
> > >
> > >
> > > > -n:crossover_3chan_piano_cs \
> > > > -a:pre1 -pf:./pre1.ecp -f:f32_le,5,48000 -i:jack
> -o:loop,1
> > > \
> > > > -a:pre2,woofer,center,rear -f:f32_le,5,48000 -i:loop,1 \
> > > > -a:pre2 -pf:./pre2.ecp -o:loop,2 \
> > > > -a:mid,tweeter -f:f32_le,5,48000 -i:loop,2 \
> > > > -a:woofer -pf:./woofer.ecp
> -chorder:1,3,0,0,0,0,0,0,0,0 \
> > > > -a:mid -pf:./mid.ecp
> -chorder:0,0,1,2,0,0,0,0,0,0 \
> > > > -a:tweeter -pf:./tweeter.ecp
> -chorder:0,0,0,0,1,2,0,0,0,0 \
> > > > -a:center -pf:./center_nodelay.ecp
> > > -chorder:0,0,0,0,0,0,3,0,0,0 \
> > > > -a:rear -pf:./rear.ecp
> -chorder:0,0,0,0,0,0,0,0,4,5 \
> > > > -a:woofer,mid,tweeter,center,rear -f:f32_le,10,48000
> -o:jack \
> > > > -a:all -z:mixmode,sum -z:nodb -B:rtlowlatency -b:64
> > >
> > > Here's the track listing the results after running
> > > crossover.nms, my port of the above. You can see most of the
> > > routing: e.g. the source and destination of each track.
> > >
> > > No. Name Requested Status Source Destination
> > > Vol Pan
> > > ============================================================
> > > ====================
> > > 1 Main OFF -- --
> > > -- --
> > > 2 Mixdown OFF -- --
> > > -- --
> > > 3 pre1 MON 1/2/3/4/5 --
> > > -- --
> > > 4 pre2 MON pre1 --
> > > -- --
> > > 5 woofer MON pre1 1/2
> > > -- --
> > > 6 center MON pre1 7
> > > -- --
> > > 7 rear MON pre1 9/10
> > > -- --
> > > 8 mid MON pre2 3/4
> > > -- --
> > > 9 tweeter MON pre2 5/6
> > > -- --
> > >
> > > And here is the chain setup, showing additional channel
> > > routing. You can also see how Nama uses jack_multi to route
> > > soundcard inputs and outputs. The chain IDs below correspond
> > > to the track numbers above.
> > >
> > > # ecasound chainsetup file
> > >
> > > # general
> > >
> > > -z:mixmode,sum -G:jack,Nama,send -b 256 -z:db,100000 -z:nointbuf
> > > -f:f32_le,10,48000
> > >
> > > # audio inputs
> > >
> > > -a:3 -i:jack_multi,system:capture_1,system:capture_2,system:
> > > capture_3,system:capture_4,system:capture_5
> > > -a:4,5,6,7 -i:loop,pre1_out
> > > -a:8,9 -i:loop,pre2_out
> > >
> > > # post-input processing
> > >
> > > -a:5 -chmove:3,2
> > > -a:6 -chmove:3,1
> > > -a:7 -chmove:4,1 -chmove:5,2
> > >
> > > # audio outputs
> > >
> > > -a:3 -o:loop,pre1_out
> > > -a:4 -o:loop,pre2_out
> > > -a:5 -o:jack_multi,system:playback_1,system:playback_2
> > > -a:6 -o:jack_multi,system:playback_7
> > > -a:7 -o:jack_multi,system:playback_9,system:playback_10
> > > -a:8 -o:jack_multi,system:playback_3,system:playback_4
> > > -a:9 -o:jack_multi,system:playback_5,system:playback_6
> > >
> > > Okay, here is the script responsible for the above. Note
> > > that tracks can be connected without specifying a loop
> > > device.
> > >
> > > # crossover.nms
> > >
> > > # create tracks and move them to the Aux bus (avoiding automated
> routing)
> > >
> > > add-tracks pre1 pre2 woofer center rear mid tweeter
> > > for pre1 pre2 woofer center rear mid tweeter; move-to-bus Aux
> > >
> > > select-track pre1
> > > set-track width 5
> > >
> > > for pre2 woofer center rear; source track pre1
> > >
> > > woofer # equivalent to 'select-track woofer'
> > > add-effect chmove 3 2
> > > stereo
> > > send 1 # send output to soundcard starting at channel 1
> > >
> > > for mid tweeter; source track pre2
> > >
> > > mid
> > > stereo
> > > send 3 # send output to soundcard starting at channel 3
> > >
> > > tweeter
> > > stereo
> > > send 5
> > >
> > > center mono
> > > add-effect chmove 3 1
> > > send 7
> > >
> > > rear
> > > stereo
> > > afx chmove 4 1 # shortcut for 'add-effect'
> > > afx chmove 5 2
> > > send 9
> > >
> > > for Aux; remove-fader-effect pan; remove-fader-effect vol
> > > Main off; rffx vol; rffx pan # shortcut for 'remove-fader-effect'
> > >
> > > cheers,
> > >
> > > --
> > > Joel Roth
> > >
> > >
> > >
> > > ------------------------------------------------------------
> > > ------------------
> > > Check out the vibrant tech community on one of the world's most
> > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > > _______________________________________________
> > > Ecasound-list mailing list
> > > Ecasound-list@email-addr-hidden
> > > https://lists.sourceforge.net/lists/listinfo/ecasound-list
> > >
>
> > ------------------------------------------------------------
> ------------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>
> > _______________________________________________
> > Ecasound-list mailing list
> > Ecasound-list@email-addr-hidden
> > https://lists.sourceforge.net/lists/listinfo/ecasound-list
>
>
> --
> Joel Roth
>
>
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Ecasound-list mailing list
> Ecasound-list@email-addr-hidden
> https://lists.sourceforge.net/lists/listinfo/ecasound-list
>

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot

_______________________________________________
Ecasound-list mailing list
Ecasound-list@email-addr-hidden
https://lists.sourceforge.net/lists/listinfo/ecasound-list
Received on Fri Jun 30 16:15:02 2017