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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | |||||||
| 0007775 | [Squeak] OS-Linux | major | always | 06-25-13 18:05 | 10-20-17 22:21 | |||||||
| Reporter | tim | View Status | public | |||||||||
| Assigned To | ||||||||||||
| Priority | high | Resolution | open | |||||||||
| Status | new | Product Version | 4.4 | |||||||||
| Summary | 0007775: unix midiplugin cannot play standard instruments via ALSA midi connection | |||||||||||
| Description |
The MIDI plugin is expected to be able to play sounds using the standard MIDI instrument list; on unix with ALSA sound drivers (i.e. on the Raspberry Pi in this case) this seems not to work. Apparently this has been a problem for some time since the Scratch code using it has been commented out since 2009. The result is that a lot of sounds are very sub-par for the users of Scratch on any unix platform and of course the Pi. This is a pity, since it gives a very poor impression. |
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| Additional Information | After gazing at the unix midi code I had to conclude that it didn't look like it could work at all, but what do I know? At the simplest level, querying the number of ports seems to give an answer that classes with related functions that get passed a port number. Compare, for example, sqMIDIGetPortCount and sqMIDIGetPortDirectionality | |||||||||||
| Attached Files |
 sqUnixMIDIALSA.inc [^] (18,532 bytes) 06-25-13 18:05 |
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Notes |
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(0014602 - 88 - 88 - 260 - 260 - 260 - 260) travm1 04-07-17 05:53 |
More info about ALSA here: https://www.everipedia.com/Advanced_Linux_Sound_Architecture/ [^] |
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(0014604 - 48 - 60 - 154 - 154 - 154 - 154) thalamus 10-20-17 18:29 |
awesome, thanks travm1 http://www.thalamus.co [^] |
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(0014605 - 532 - 562 - 562 - 562 - 562 - 562) tim 10-20-17 22:21 |
Oh my, I'd forgotten about this; long time ago. The problem was actually 'fixed' a couple of years ago by someone (and I can't find any trace of the name, but Yoshiki might recall since it is one of the Japanese squeakers) who wrote a shell scfript to install Timidity and soundfonts. It works, but Timidity seems to have a resource leak since it gradually takes more and more cpu%. There are timing issues as well, with the HDMI sound being particularly strange. The script on the Pi is /usr/share/scratch/timidityinstall.sh |
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Issue History |
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| Date Modified | Username | Field | Change |
| 06-25-13 18:05 | tim | New Issue | |
| 06-25-13 18:05 | tim | File Added: sqUnixMIDIALSA.inc | |
| 06-25-13 18:06 | tim | Issue Monitored: tim | |
| 04-07-17 05:53 | travm1 | Note Added: 0014602 | |
| 10-20-17 18:29 | thalamus | Note Added: 0014604 | |
| 10-20-17 22:21 | tim | Note Added: 0014605 | |
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