View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0006025 | ardour | bugs | public | 2014-11-14 04:21 | 2020-04-19 20:16 |
| Reporter | florianb | Assigned To | florianb | ||
| Priority | normal | Severity | major | Reproducibility | random |
| Status | closed | Resolution | fixed | ||
| Summary | 0006025: MIDI data randomly lost between MidiBuffer and JACKAudioBackend::midi_event_put | ||||
| Description | Some MIDI data from Ardour is getting randomly lost after MidiIO debug. The data never reaches the function JACKAudioBackend::midi_event_put. Curiously, this happens very often on MTC, extremely rarely on MMC, and never on MIDI Clock. It also happens often for MIDI track controllers such as sustain pedal. The MTC seems sent when position is changed with the mouse in Ardour's window, but not when changed from an MCU wheel (randomly dropped) Increasing the jack buffer to a non-reasonable value of 2048 for such powerful machine helps a lot. Probability of MTC event loss using MCU wheel with 512*2 jack buffer is about 50%. | ||||
| Additional Information | Ardour git 3.5-3515 g3e702c5 downloaded on 20141112 Occurs in recent previous versions as well. Jack 1.9.10 Slackware64 14.1 Linux 3.14.12-rt9 - Core i3-4150 3.65MHz 16GB DDR3 2500MHz SSD Samsung RME RayDay. - Debated on IRC on 2014-11-13 at night between FlorianBd and rgareus. | ||||
| Tags | No tags attached. | ||||
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That could be the reason ardour doesn't record most of my sustain pedal. I would like to help with informations I could give. |
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robertnyles: for you and anyone else passing by here, can you: - start ardour in terminal with --debug MTC - disable MMC and MIDI Clock in preferences, but send MTC - start jack_midi_dump and connect it in jack to Ardour's MTC output Then, if you have a Mackie Control, move the wheel to relocate the cursor, and observe if jack_midi_dump always receives what the MTC debug claims to send. For me it seems to work when relocating the cursor by clicking on the top bar of Ardour, but not from an MCU. Maybe you can setup some similar test to dump the pedal data... You could create a test midi track with some very cyclic pedal data, then look at the dump connected to the appropriate output. |
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Ideally you can modify libs/backends/jack/jack_portengine.cc in the source like this: http://pastebin.com/BJHG4uY7 then recompile Ardour and it will print every single data sent to jack. That's how I know that the data never reaches the JACKAudioBackend::midi_event_put function. |
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I used your settings and recorded a test with sustain pedal. ardour --debug MTC says: // Ardour3.5.403 (kompiliert mit Version 3.5-403-gec2cb31 und GCC Version4.8.3 20140911 (Red Hat 4.8.3-7)) // Kann die SIGPIPE Fehlerbehandlung nicht installieren // drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 0x7fc78c102660 note 48/0 was already on, now at 2 0x7fc78c102660 note 36/0 was already on, now at 2 0x7fc78c102660 note 48/0 was already on, now at 3 0x7fc78c102660 note 36/0 was already on, now at 3 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 drop flushed event on the floor, time 0 to early for 1 + 0 But the record is correct with these settings. The midi dump seems to get all events from my piano. That are much more than I'd expected. With my usual settings only the record was missing the pedal data sometimes. While playing the synth gets everything. |
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2014-11-14 19:47
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ardour-bug6025-debug-log.txt (2,221 bytes)
# output of --debug MidiIO,MTC # Difference between debug log when data was lost, and not lost. ##### LOST : ##### DEBUG::MidiIO: midibuffer 0x3354940 push event @ 85 sz 3 0xb0 0x3c 0x1 DEBUG::MTC: Full MTC TC 214400 DEBUG::MidiIO: midibuffer 0x4d2b3d0 push event @ 0 sz 10 0xf0 0x7f 0x7f 0x1 0x1 0x60 0x0 0x2 0x6 0xf7 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x56 0x0 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5e 0x0 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5d 0x7f DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5b 0x0 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5c 0x0 DEBUG::MTC: Full MTC TC 214400 DEBUG::MidiIO: midibuffer 0x4d2b3d0 push event @ 0 sz 10 0xf0 0x7f 0x7f 0x1 0x1 0x60 0x0 0x2 0x6 0xf7 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x40 0x37 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x41 0x39 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x42 0x37 # NOTE: there a missing line here comparing to the following working case. # -> jack_midi_dump DID NOT RECEIVE ANYTHING. ##### NOT LOST : ##### DEBUG::MidiIO: midibuffer 0x3354940 push event @ 21 sz 3 0xb0 0x3c 0x1 DEBUG::MTC: Full MTC TC 220800 DEBUG::MidiIO: midibuffer 0x4d2b3d0 push event @ 0 sz 10 0xf0 0x7f 0x7f 0x1 0x1 0x60 0x0 0x2 0x8 0xf7 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x56 0x0 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5e 0x0 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5d 0x7f DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5b 0x0 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0x90 0x5c 0x0 DEBUG::MTC: Full MTC TC 220800 DEBUG::MidiIO: midibuffer 0x4d2b3d0 push event @ 0 sz 10 0xf0 0x7f 0x7f 0x1 0x1 0x60 0x0 0x2 0x8 0xf7 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x40 0x34 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x41 0x32 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x42 0x31 DEBUG::MidiIO: midibuffer 0x3341fa0 push event @ 0 sz 3 0xb0 0x43 0x31 # -> jack_midi_dump received: # f0 7f 7f 01 01 60 00 02 08 f7 |
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Suddenly while playing back all sustain data was ignored until stop. And I had no dump... Everything worked fine for hours. I changed settings and tried to decrease the buffer to 128/3. When the bug occurs so rarely it's very difficult to get some data. Do you get a MIDI-off when you stop playback? I don't. That bug should have been fixed. Maybe it correlates. http://tracker.ardour.org/view.php?id=2139 |
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robertnyles: how many cpu do you use in ardour's preferences? I was using only one and I can ALMOST never reproduce the issue when using "all processors" (2) |
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This and other midi data related issues were fixed by Drobilla on 2014-11-20 in 3.5-3624-g4bc0d1c. Please re-open this ticket if it's not the case. |
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This and other midi data related issues were fixed by Drobilla on 2014-11-20 in 3.5-3624-g4bc0d1c. Please re-open this ticket if it's not the case. |
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I guess "resolved" is better than "closed" |
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Issue has been closed automatically, by Trigger Close Plugin. Feel free to re-open with additional information if you think the issue is not resolved. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-11-14 04:21 | florianb | New Issue | |
| 2014-11-14 14:54 | robertnyles | Note Added: 0015971 | |
| 2014-11-14 15:26 | florianb | Note Added: 0015972 | |
| 2014-11-14 16:00 | florianb | Note Added: 0015973 | |
| 2014-11-14 19:06 | robertnyles | Note Added: 0015974 | |
| 2014-11-14 19:08 | robertnyles | Note Edited: 0015974 | |
| 2014-11-14 19:47 | florianb | File Added: ardour-bug6025-debug-log.txt | |
| 2014-11-14 20:34 | robertnyles | Note Added: 0015976 | |
| 2014-11-16 21:22 | florianb | Note Added: 0015987 | |
| 2014-11-20 21:33 | florianb | Note Added: 0015995 | |
| 2014-11-20 21:33 | florianb | Note Added: 0015996 | |
| 2014-11-20 21:33 | florianb | Status | new => resolved |
| 2014-11-20 21:33 | florianb | Resolution | open => fixed |
| 2014-11-20 21:33 | florianb | Assigned To | => florianb |
| 2014-11-20 21:33 | florianb | Status | resolved => closed |
| 2014-11-20 21:36 | florianb | Note Added: 0015997 | |
| 2014-11-20 21:36 | florianb | Status | closed => feedback |
| 2014-11-20 21:36 | florianb | Resolution | fixed => reopened |
| 2014-11-20 21:36 | florianb | Status | feedback => resolved |
| 2014-11-20 21:36 | florianb | Resolution | reopened => fixed |
| 2020-04-19 20:16 | system | Note Added: 0023340 | |
| 2020-04-19 20:16 | system | Status | resolved => closed |
