On Sat, Jan 17, 2009 at 3:23 PM, Nelson Chan <nelson_bigmo...@yahoo.com> wrote: > Just got musescore to do playback. You need "jackd" to run with > musescore.
No - you don't. It's helpful, certainly not necessary. Because of ALSA and hardware mixing and the mess that I'm sure Dan would be able to opine forever about, in many cases only one application can use the soundcard at once. In desktop Ubuntu, this is often PulseAudio, or JACK, or MuseScore: clearly these three things compete. Because Pulse is started first, the wrapper scripts for JACK and MuseScore check to see if it is running, and then disable it: this is why programs like Rhythmbox appear to stop working. If MuseScore notices JACK is running, it uses that. A further complication arises because MuseScore, naturally, tries to open the "default" card. In some situations in Ubuntu, this can be a virtual pointer to the PulseAudio software. If Pulse is suspended (because MuseScore's start-up has noticed it running), then the default device won't open and MuseScore will assume there is no sound output support, and disable synthesis. (This line in output is symptomatic of this problem: "Alsa_driver: the interface doesn't support mmap-based access"). Of course, if you have an ALSA-registered hardware/software synth (eg emu10k1, fluidsynth, timidity, etc), MuseScore can also use ALSA MIDI commands for output. JACK is helpful, but is often a pain to set up and use. As a result, I do not recommend it for most users, especially casual MuseScore users, who likely are not in need of its advanced features or configurability. ALSA MIDI is another option, but the UI for that is non-intuitive, and there are few common hardware synthesizers. In the last case, MuseScore also supports using the PortAudio library for output. As you can see when using Audacity, that does not directly support PulseAudio. I'm slowly writing a back-end for this case[1], but my time has many pressures on it, and so "slowly" means less-than-Debian-paced. I hope this has been helpful. - Toby Smithe, mscore maintainer [1] https://code.launchpad.net/~tsmithe/+junk/portaudio.pulse -- Unable to playback in MuseScore https://bugs.launchpad.net/bugs/292391 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
