View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0009481 | ardour | bugs | public | 2023-10-14 10:28 | 2023-10-17 04:13 |
| Reporter | doojonio | Assigned To | x42 | ||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Redhat | OS | Linux | OS Version | (any) |
| Product Version | 8.0 | ||||
| Summary | 0009481: MIDI event duplicates on midi buses during session exports when using ALSA | ||||
| Description | If you use ALSA as a backend for Ardour: 1) MIDI events from midi track to midi bus duplicate during session exports. 2) They don't duplicate in realtime, but duplicate during export. 3) This bug causes increasing volume on the bus during the export, because midi bus instrument will play twice. So volume balance in exported session will be ruined | ||||
| Steps To Reproduce | 1) Create new session with ALSA backend 2) Add a midi track without instrument and a midi bus with somo instrument (lsp sampler for example). Set MIDI track output to the MIDI bus 4) Add ACE MIDI Monitors before MIDI bus instrument 3) Draw some notes on the midi track and play them in realtime. Ensure that midi events do not duplicate 4) Export (in realtime) session. During the playback, ensure that midi events duplicate on the midi bus before the instrument. And it plays with more volume. | ||||
| Additional Information | I uploaded the video. In first part I play session in realtime. In second part I export session. You can see that MIDI bus plays louder during the export and there are duplicates of the midi events (double "On C2" notes) | ||||
| Tags | alsa, bus, export, Midi | ||||
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Could you attach your test session as a session archive please? (Use the top level menu .. Session > Archive) |
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You can easily test it by using realtime export. Export > Time Span (at top) > RT checkbox. When you will export my attached session, piano will clipping, but when you play it in ardour without exporting, it wont |
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Also happens during normal export (realtime export is not required) |
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Fixed in 8.0-44-g44a2ef9098 I am however curious which synth produces louder output after receiving a duplicate Note-On (same timestamp). |
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I use LSP Sampler to add drum samples. It is produces louder sample output after receiving a duplicate Note-On |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2023-10-14 10:28 | doojonio | New Issue | |
| 2023-10-14 10:31 | doojonio | Tag Attached: alsa | |
| 2023-10-14 10:31 | doojonio | Tag Attached: Midi | |
| 2023-10-14 10:31 | doojonio | Tag Attached: bus | |
| 2023-10-14 10:31 | doojonio | Tag Attached: export | |
| 2023-10-14 13:38 | paul | Note Added: 0028199 | |
| 2023-10-14 15:04 | doojonio | Note Added: 0028200 | |
| 2023-10-14 15:04 | doojonio | File Added: midi event duplicates_2023-10-14_200258.ardour-session-archive | |
| 2023-10-14 15:07 | doojonio | Note Added: 0028201 | |
| 2023-10-16 20:57 | x42 | Assigned To | => x42 |
| 2023-10-16 20:57 | x42 | Status | new => confirmed |
| 2023-10-16 20:57 | x42 | Note Added: 0028215 | |
| 2023-10-17 04:04 | x42 | Status | confirmed => resolved |
| 2023-10-17 04:04 | x42 | Resolution | open => fixed |
| 2023-10-17 04:04 | x42 | Note Added: 0028216 | |
| 2023-10-17 04:13 | doojonio | Note Added: 0028217 |
