Hi all,
first of all: Many thanks to Paul for this -absolutely- great piece of Software
I´m currently set-up the so called “el-cheapo” multitrack device using Alsa and Jackd using five SB128 (module ens-1371) under SL 10.0 with the Jacklab-RT-Kernel and mmap_access patched and manually compiled 0.100.7). It works, but i only hear the “merged” output signal when input monitoring is active (even the Ladspa-Plugins work in “realtime”). Internal signal routing inside Ardour between the input channels and master out doesn´t work. The master channel gets only active, when i choose a “direct” ALSA input for the master channel.
So my question goes to there, where the difference is between “input monitoring” / even active Ladspa Plugins within Ardour and the routing between channel-out/Master in (i see no activity within the Peak-Meter of the Master channel). I know that Paul said that this sort of multichannel device doesn´t work, but i´d like to know why. As the Inet says, do RME Hammerfalls and Delta1010´s work with this method and even the input monitoring works for -me-. The Ladspa Plugins also know to handle the streams in realtime and even Ardour show its activity on the channel peak-meters, so i ask myself, why it won´t work, when Input monitoring is inactive (playback while recording won´t also work, even with -D in jackd). When i record then all inputs simultaneously, Ardour captures all channels without problems, but without realtime output to the playback/output device.
I use the following command to start Jackd (where hw:1-4 is used for capture, hw:0 is playback):
jackd -R -v -dalsa -Cmulti -Phw:0 -r44100 -p1024
.asoundrc:
pcm.multi {
type multi
slaves.a.pcm hw:1
slaves.a.channels 2
slaves.b.pcm hw:2
slaves.b.channels 2
slaves.c.pcm hw:3
slaves.c.channels 2
slaves.d.pcm hw:4
slaves.d.channels 2
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave a
bindings.1.channel 1
bindings.2.slave b
bindings.2.channel 0
bindings.3.slave b
bindings.3.channel 1
bindings.4.slave c
bindings.4.channel 0
bindings.5.slave c
bindings.5.channel 1
bindings.6.slave d
bindings.6.channel 0
bindings.7.slave d
bindings.7.channel 1
}
ctl.multi {
type hw
card 1
}
Interleave capture channels
pcm.ttable {
type route
slave.pcm “multi”
ttable.0.0 1
ttable.1.1 1
ttable.2.2 1
ttable.3.3 1
ttable.4.4 1
ttable.5.5 1
ttable.6.6 1
ttable.7.7 1
}
ctl.ttable {
type hw
card 1
}
Using a .asoundrc-“playback” device, even the usage of the “ttable”-device doesn´t work, Jackd will come up with messages “cannot configure hardware device blahblah for capture / playback”…
Many thanks for your help
Greetings
Stef