# SocketError on midi\_note\_on **URL:** \ **Category:** Support, Help & Resources\ **Created:** [December 22, 2018, 8:53pm UTC](https://in-thread.sonic-pi.net/t/socketerror-on-midi-note-on/1835 "2018-12-22T20:53:49Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jcfischer](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/jcfischer/32/88_2.png) [@jcfischer](https://in-thread.sonic-pi.net/u/jcfischer)\ **Post date:** [December 22, 2018, 8:53pm UTC](https://in-thread.sonic-pi.net/t/socketerror-on-midi-note-on/1835/1 "2018-12-22T20:53:49Z")
Hi all I just tried to control my (new) HW synth via USB Midi. The setup I have is a Behringer Neutron (USB to Mac), an Arturia Keystep (USB to Mac, MIDI-OUT to MIDI-IN on Neutron). I can play the Neutron from the Keystep via Midi (no problem). SonicPi sees both the Keystep and the Neutron as Midi devices: ```ruby /midi/arturia_keystep_32/4/1/note_on [76, 25] /midi/neutron/6/1/note_on [76, 25] /midi/arturia_keystep_32/4/1/note_off [76, 64] /midi/neutron/6/1/note_off [76, 64] ``` When I try to control the Neutron from sonic-pi, I get the following error: ``` midi_note_on :e3, 50 ``` ```ruby Runtime Error: [buffer 0, line 2] - SocketError Thread death! getaddrinfo: nodename nor servname provided, or not known /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:45:in `send' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:45:in `send_ts' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/core.rb:650:in `__osc_send' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:1523:in `__midi_send_timed' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:1519:in `__midi_send_timed_pc' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:327:in `block (2 levels) in midi_note_on' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:326:in `each' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:326:in `block in midi_note_on' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:325:in `each' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/lang/midi.rb:325:in `midi_note_on' workspace_zero:2:in `block (2 levels) in __spider_eval' /Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/runtime.rb:1043:in `block (2 levels) in __in_thread' ``` The Mac -\> USB -\> Midi -\> Neutron connection works fine (I can use Ableton to send Midi via USB to the Neutron) I’m using SonicPi 3.1 Here’s the ‘server-output.log’ ```ruby Sonic Pi server booting... Using protocol: udp Detecting port numbers... Send port: 4558 Listen port: 4557 - OK Scsynth port: 4556 - OK Scsynth send port: 4556 - OK OSC cues port: 4559 - OK Erlang port: 4560 - OK OSC MIDI out port: 4561 - OK OSC MIDI in port: 4562 - OK Booting server... Booting Sonic Pi ---------------- Boot - Booting on OS X Boot - Checkout audio rates on OSX: Boot - Input audio rate: 48000.0 Boot - Output audio rate: 48000.0 Boot - Sample rates match, we may continue to boot... Boot - Starting the SuperCollider server... Boot - /Applications/Sonic Pi.app/app/server/native/scsynth -u 4556 -a 1024 -m 131072 -D 0 -R 0 -l 1 -i 16 -o 16 -U /Applications/Sonic Pi.app/app/server/native/supercollider/plugins/ -b 4096 -B 127.0.0.1 Started [27284] [-] /Applications/Sonic Pi.app/app/server/native/scsynth -u 4556 -a 1024 -m 131072 -D 0 -R 0 -l 1 -i 16 -o 16 -U /Applications/Sonic Pi.app/app/server/native/supercollider/plugins/ -b 4096 -B 127.0.0.1 [-] /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27284 Boot - SuperCollider booted successfully. Boot - Connecting to the SuperCollider server... Boot - Sending /status to server: 127.0.0.1:4556 Boot - Receiving ack from scsynth Boot - Server connection established Studio - Initialised SuperCollider Audio Server v3.9.0 Studio - Resetting server Studio - Studio - clearing scsynth Studio - Studio - allocating audio bus Studio - Studio - Create Base Synth Groups Studio - Starting mixer Studio - Starting scope "/Applications/Sonic Pi.app/app/server/native/ruby/bin/ruby" "/Applications/Sonic Pi.app/app/server/native/erlang/erl" -noshell -pz "/Applications/Sonic Pi.app/app/server/erlang" -s pi_server start 4560 Started [27286] [-] /Applications/Sonic Pi.app/app/server/native/erlang/dist/bin/beam.smp -- -root /Applications/Sonic Pi.app/app/server/native/erlang/dist -progname erl -- -home /Users/jcf -- -noshell -pz /Applications/Sonic Pi.app/app/server/erlang -s pi_server start 4560 [-] /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27286 Studio - Spawning o2m with: '/Applications/Sonic Pi.app/app/server/native/osmid/o2m' -L -b -i 4561 -O 4562 -m 6 Started [27289] [-] /Applications/Sonic Pi.app/app/server/native/osmid/o2m -L -b -i 4561 -O 4562 -m 6 [-] /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27289 Studio - Spawning m2o with: '/Applications/Sonic Pi.app/app/server/native/osmid/m2o' -b -o 4562 -m 6 'Sonic Pi' Started [27291] [-] /Applications/Sonic Pi.app/app/server/native/osmid/m2o -b -o 4562 -m 6 Sonic Pi [-] /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27291 Studio - Initialised MIDI subsystems This is Sonic Pi v3.1 running on osx with ruby api 2.5.0. Sonic Pi Server successfully booted. Studio - Pausing SuperCollider Audio Server Studio - Pausing SuperCollider Audio Server Studio - Pausing SuperCollider Audio Server Clearing pids: ["27289"] Clearing [27289] -- command /Applications/Sonic Pi.app/app/server/native/osmid/o2m -L -b -i 4561 -O 4562 -m 6 -- removing /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27289 -- politely killing 27289 -- politely killing 27289 -- politely killing 27289 -- force killing 27289 -- force killing 27289 -- force killing 27289 -- force killing 27289 -- force killing 27289 -- unable to kill 27289 Finished clearing pids Clearing pids: ["27291"] Clearing [27291] -- command /Applications/Sonic Pi.app/app/server/native/osmid/m2o -b -o 4562 -m 6 Sonic Pi -- removing /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27291 -- politely killing 27291 -- politely killing 27291 -- politely killing 27291 -- force killing 27291 -- force killing 27291 -- force killing 27291 -- force killing 27291 -- force killing 27291 -- unable to kill 27291 Finished clearing pids Studio - MIDI Subsystems stopped. Studio - Spawning o2m with: '/Applications/Sonic Pi.app/app/server/native/osmid/o2m' -L -b -i 4561 -O 4562 -m 6 Started [27329] [-] /Applications/Sonic Pi.app/app/server/native/osmid/o2m -L -b -i 4561 -O 4562 -m 6 [-] /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27329 Studio - Spawning m2o with: '/Applications/Sonic Pi.app/app/server/native/osmid/m2o' -b -o 4562 -m 6 'Sonic Pi' Started [27331] [-] /Applications/Sonic Pi.app/app/server/native/osmid/m2o -b -o 4562 -m 6 Sonic Pi [-] /var/folders/0_/n8thfj757ks6sf2hms305mqr0000gn/T/sonic-pi-pids/27331 Studio - MIDI Subsystems started. Studio - Pausing SuperCollider Audio Server Exiting - shutting down scsynth server... Sending /quit command to scsynth Stopping OSC server... Stopped OSC server... Server is exiting. Shutting down GUI... Goodbye :-) ``` and here the server-errors.log ```ruby /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated /Applications/Sonic Pi.app/app/server/ruby/vendor/sys-proctable-1.1.3/lib/darwin/sys/proctable.rb:163: warning: constant ::Fixnum is deprecated OSC handler exception for address: /exit getaddrinfo: nodename nor servname provided, or not known ["/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:40:in `send'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:40:in `send'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/runtime.rb:407:in ` __osc_flush!'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/runtime.rb:400:in `__ stop_jobs'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/runtime.rb:849:in `__exit'", "/Applications/Sonic Pi.app/Contents/MacOS/../../app/server/ruby/bin/sonic-pi-server.rb:227:in `block in
'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:92:in `block in start_listener'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:72:in `loop'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:72:in `start_listener'", "/Applications/Sonic Pi.app/app/server/ruby/lib/sonicpi/osc/udp_server.rb:35:in `block in initialize'"] ``` I’m on OS 10.13.6 Any ideas? cheers jens-christian ---
**Author:** ![robin.newman](https://avatars.discourse-cdn.com/v4/letter/r/76d3ee/32.png) [@robin.newman](https://in-thread.sonic-pi.net/u/robin.newman)\ **Post date:** [December 23, 2018, 9:03am UTC](https://in-thread.sonic-pi.net/t/socketerror-on-midi-note-on/1835/2 "2018-12-23T09:03:36Z")
Some thoughts. You haven’t altered the midi setup AFTER starting Sonic Pi? If so you must press the Reset-Midi button on the IO preference tab in Sonic Pi (no harm in doing sop anyway). What does the io tab midi device list show? Using `midi_note_on :e3, 50` will try to send to all ports and every channel. Have you tried using `use_midi_defaults` to set the port “neutron” and channel you wish to use? (I assume here that “neutron” is the port name that SP is recognizing…see the IO device list) eg ```ruby use_midi_defaults port:"neutron",channel: 1 midi_note_on :e3, 50 ``` ---
**Author:** ![jcfischer](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/jcfischer/32/88_2.png) [@jcfischer](https://in-thread.sonic-pi.net/u/jcfischer)\ **Post date:** [December 23, 2018, 9:20am UTC](https://in-thread.sonic-pi.net/t/socketerror-on-midi-note-on/1835/3 "2018-12-23T09:20:49Z")
Thanks Robin sorry for not stating that before: Yes. I tried all the combinations with port, channel and use\_midi\_defaults. I also reset the midi configuration for good measure. To my (untrained) eye, it seems to be a more fundamental problem with some service from SonicPI (MIDI) not being available and listening. cheers jc ---
**Author:** ![kniknoo](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/kniknoo/32/146_2.png) [@kniknoo](https://in-thread.sonic-pi.net/u/kniknoo)\ **Post date:** [December 27, 2018, 7:33am UTC](https://in-thread.sonic-pi.net/t/socketerror-on-midi-note-on/1835/4 "2018-12-27T07:33:51Z")
Try turning on the OSC system and then restart sonic pi. IIRC that’s the error I’d get if I turned off OSC and then restarted SPi. ---
**Author:** ![jcfischer](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/jcfischer/32/88_2.png) [@jcfischer](https://in-thread.sonic-pi.net/u/jcfischer)\ **Post date:** [December 27, 2018, 3:13pm UTC](https://in-thread.sonic-pi.net/t/socketerror-on-midi-note-on/1835/5 "2018-12-27T15:13:28Z")
That didn’t help either - I tried all combinations of switching on/off the Midi and OSC subsystems and restarting SonicPi. I guess I will have to dive into the Ruby Code myself 🙂