28 Dec
2005
28 Dec
'05
2:29 p.m.
Sean Bolton wrote:
Hi Dave,
On Dec 28, 2005, at 4:26 AM, Dave Phillips wrote:
Okay, I retested WS as a single instance and as two (with the -2 option
for jack-dssi-host). With the single instance everything worked as you
describe. However, in the dual-instance scenario the second synth
receives program changes all right (i.e. the highlighted patch changes
in the patch display), but it wasn't receiving note-ons. :( But read on...
A few questions re: your excellent WhySynth :
WS seems weird wrt MIDI program change. Am I missing something ?
Sending a change from a sequencer or keyboard doesn't match the
default list of voices. PC 0 selects a sound all right, but it's not
the Slow Strings at position 0 in the default patch list. What is
MIDI PC actually selecting ?
Edits made to a patch don't take effect in realtime, or am I
missing something again ?
Yeah, something's weird -- on my systems, WhySynth responds
as one would expect to program changes coming from external
sources, and patch edits take effect in real time for everything
except the envelopes (where they take effect on the next note
played.)
When you send a PC from an external source, does the high-
lighted patch in the GUI patch list change? Are you using bank
select (which might mean program 128 or 256 of 384 is being
selected instead)? If you run jack-dssi-host with the '-v' debug
switch, do you see
messages like this:
jack-dssi-host: OSC: whysynth/WhySynth/chan00 port 7 = 0.133895
appearing in real time as you edit a patch, or are they delayed?
They're appearing in realtime. I'm not having the problem now, it was
likely just a doofus user error.
On Dec 28, 2005, at 8:33 AM, Dave Phillips wrote:
Okay, that works. Three instances are launched, the first has Channel
0 in its window titlebar, the next has Channel 1, the last has
Channel 2. However, only Channel 0 is accessable from my sequencer.
What's going on ? The channels referred to are MIDI channels, yes ?
How can I reach the other instances ?
What you've done here is start one instance of jack-dssi-host
hosting three instances of the WhySynth plugin. jack-dssi-host
will have one ALSA MIDI port as input, and will split the incoming
MIDI by channel to send to each of the three plugin instances.
So if you can get sound on channel 0, you should be able to get
sound on channels 1 and 2 via the same MIDI connection by just
changing the MIDI channel number. Note that jack-dssi-host will
have created 6 JACK ports for the audio output -- a left and right
out for each plugin instance -- so make sure these are connected
appropriately or you won't hear the output.
Ah, there's the cuplrit. I reconnected in QJackCtl for simple stereo
output, and I now have multiple instances of WS making sound.
'jack-dssi-host -2 whysynth.so' should launch
two synths with two
separate GUIs, 'jack-dssi-host -3 whysynth.so' should launch three
synths etc.
HTH. Looking forward to the demo!
Thanks a lot, Sean. On to the music... :)
Best,
dp