|Summary:||EFFECT_INSTANCE: FX_SEND Outputs errors|
|Product:||LinuxSampler||Reporter:||Nicola Pandini <nicola.pandini>|
|Component:||other||Assignee:||Christian Schoenebeck <cuse>|
Description Nicola Pandini 2012-01-11 14:23:21 CET
Hi, If I set the outputs of an FX SEND (assigned to an EFFECT CHAIN) to outputs 2 and 3, I've got the following error: Engine::RouteAudio() Error: invalid FX send (L) destination channel (0->2) I'm using the following lscp script: CREATE AUDIO_OUTPUT_DEVICE JACK ACTIVE=true CHANNELS=4 SAMPLERATE=44100 NAME='LinuxSampler' SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 0 NAME='0' SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 0 JACK_BINDINGS=NONE SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 1 NAME='1' SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 1 JACK_BINDINGS=NONE SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 2 NAME='2' SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 2 JACK_BINDINGS=NONE SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 3 NAME='3' SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 3 JACK_BINDINGS=NONE ADD SEND_EFFECT_CHAIN 0 CREATE EFFECT_INSTANCE LADSPA '/usr/lib/ladspa/calf.so' 'Reverb' APPEND SEND_EFFECT_CHAIN EFFECT 0 0 0 REMOVE MIDI_INSTRUMENT_MAP ALL ADD CHANNEL LOAD ENGINE SFZ 0 SET CHANNEL VOLUME 0 1.0 SET CHANNEL MIDI_INSTRUMENT_MAP 0 NONE SET CHANNEL AUDIO_OUTPUT_DEVICE 0 0 SET CHANNEL AUDIO_OUTPUT_CHANNEL 0 0 0 SET CHANNEL AUDIO_OUTPUT_CHANNEL 0 1 1 LOAD INSTRUMENT NON_MODAL '/home/sfz_library/example.sfz' 0 0 CREATE FX_SEND 0 3 'New effect send' SET FX_SEND LEVEL 0 0 1.0 SET FX_SEND AUDIO_OUTPUT_CHANNEL 0 0 0 2 SET FX_SEND AUDIO_OUTPUT_CHANNEL 0 0 1 3 SET FX_SEND EFFECT 0 0 0 0
Comment 1 Christian Schoenebeck 2019-03-10 16:35:42 CET
Does this problem still persist or can this report be closed?
Comment 2 Nicola Pandini 2019-03-11 11:57:24 CET
Hi, the problem is still there(2.0.0.svn76), but I don't use the effect chain feature anymore. Should new versions solve the problem?
Comment 3 Christian Schoenebeck 2019-03-11 12:34:56 CET
Ok, I haven't tried your example yet, but looking at your LSCP commands, if I understand you correctly then the following two commands: SET FX_SEND AUDIO_OUTPUT_CHANNEL 0 0 0 2 SET FX_SEND AUDIO_OUTPUT_CHANNEL 0 0 1 3 were actually intended by you to send those FX sends directly to the audio output device's audio channels 3 and 4. That's fine, but then you also do this at the end: SET FX_SEND EFFECT 0 0 0 0 which causes your FX send not to be sent directly to the audio output device channels, but rather to the reverb effect that you loaded before. And that reverb effect I guess is stereo (that is 2 channels, not 4 channels). So if you omit the last LSCP command then it should actually work as expected by you.
Comment 4 Nicola Pandini 2019-03-11 15:04:11 CET
Yes, I can confirm that removing "SET FX_SEND EFFECT 0 0 0 0" solve the problem. Thanks!
Comment 5 Christian Schoenebeck 2019-03-11 16:16:41 CET
So this issue was simply due to confusion of how to use the LSCP commands for the purpose of using external effects. To avoid that in future I just committed some changes, providing more useful error messages for FX send routing problems and making the LSCP reference documentation more clear about external vs. internal effects: http://svn.linuxsampler.org/cgi-bin/viewvc.cgi?view=revision&revision=3501 I'm going to close this report. Thanks!