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powertab / powertabeditor

View and edit guitar tablature.
https://powertab.github.io
GNU General Public License v3.0
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Playback is too slow #214

Closed Malethar closed 4 years ago

Malethar commented 8 years ago

The playback of tabs way too slow. If you export the midi or use any other tab playback software, you'll notice that it's played way faster than in PTE.

cameronwhite commented 8 years ago

Do you have a specific tab that has this problem? It seems okay for me (on OSX) - I timed using a stopwatch how long it took to play a few bars in PTE vs Guitar Pro, and the difference was negligible.

Malethar commented 8 years ago

on Windows 10, it's 20 bpm slower

On Sat, Mar 5, 2016 at 4:23 PM, Cameron White notifications@github.com wrote:

Do you have a specific tab that has this problem? It seems okay for me (on OSX) - I timed using a stopwatch how long it took to play a few bars in PTE vs Guitar Pro, and the difference was negligible.

— Reply to this email directly or view it on GitHub https://github.com/powertab/powertabeditor/issues/214#issuecomment-192742892 .

cameronwhite commented 8 years ago

OK, I'll give it a try on my Windows machine later

Canaanabolaanan commented 8 years ago

I can confirm it's slower. I suspect the BPM differential may be a percentage rather than an absolute number like 20 though.

Malethar commented 8 years ago

yeah, i just used 20 as a way to compensate for the time being

On Sat, Mar 5, 2016 at 10:37 PM, Canaanabolaanan notifications@github.com wrote:

I can confirm it's slower. I suspect the BPM differential may be a percentage rather than an absolute number like 20 though.

— Reply to this email directly or view it on GitHub https://github.com/powertab/powertabeditor/issues/214#issuecomment-192795934 .

nikita-kiryanov commented 6 years ago

I can also report that playback is noticeably slow, and it's like this in all tabs I tried so far. By rough estimation, it's about 25% slower than it should be, and I also noticed that sometimes it suddenly picks up speed, and then slows down again I'm using Windows 10.

cameronwhite commented 4 years ago

Can you try with the latest release? I suspect #269 might have fixed this.

acjay commented 4 years ago

I think there are still playback issues with slides, specifically. Things seem fine for bends, but slides cause the tempo to slow down for the duration of the slide. I'm experiencing this on Windows 10.

cameronwhite commented 4 years ago

Thanks, I think I can reproduce that on OSX. It seems to be more an issue with slides in/out of a note rather than shift/legato slides between notes - does that match what you were seeing?

acjay commented 4 years ago

I think it's affecting all slides, as far as I can tell

cameronwhite commented 4 years ago

Yeah, testing on Windows I'm seeing that a bit more, although performance is a bit harder to evaluate on a VM

cameronwhite commented 4 years ago

Attached is a simple file that I was testing with: slides.zip

cameronwhite commented 4 years ago

I think this should be fixed with 6604fb5 - I've verified that the wall clock time between notes in that file stays consistently at 500ms (120bpm) now, whereas before it was often drifting up to 540-550ms with some of the slides.

Thanks for all the testing on this!