Windows 10 SDL latency issues

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I used LMMS 1.1.3 for a while, with the libportaudio.dll substitution trick to get low-latency ASIO. LMMS is great. Thank you.

When I try any of the 1.2.0 versions (especially the test builds with audio recording) I only have SDL as an option. No matter what I try, I get high latency (~65ms on the built-in sound card, a horrendous ~130ms on an external Focusrite Scarlett). Recording isn't possible with such latencies. With 1.1.3 and the dll substitution I get no audible latency at all (on either sound card, with ASIO4ALL for the built-in, and Focusrite ASIO driver for the Scarlett).

I searched these forums and the internet for options, but didn't find any.

Are there any other windows 10 users experiencing such latency?

Are there any tips, tricks, settings, other options to reduce latency with SDL on windows 10?

Thanks in advance, any help appreciated.

(Windows 10 Home 1709 64 bits, Intel i7-6500U @ 2.5GHz, 8GB memory)
roll wrote:
Sat Apr 21, 2018 5:47 pm
I used LMMS 1.1.3 for a while,
But new here, so-
Welcome to the forum roll!
Here are all important links:
viewtopic.php?f=1&t=4740
-A few rules and useful forum instructions

Your issue sounds bad. ASIO issues i have had, and also BSOD. But SDL has worked flawless on windows, so This may be a bug, so i will ask you to make a real bug-report here: https://github.com/LMMS/lmms.io/issues/new

Did you try the RC5 without recording?
It would be beneficial if you had, because this would narrow 'suspicions' down a notch
I believe this one was latest https://github.com/LMMS/lmms/releases/tag/v1.2.0-rc5
musikbear wrote: This may be a bug, so i will ask you to make a real bug-report here: https://github.com/LMMS/lmms.io/issues/new
I filed a bug report.

musikbear wrote: Did you try the RC5 without recording?
Yes, I tried lmms-1.1.3-win64.exe, lmms-1.2.0-rc5-win64.exe and lmms-1.2.0-rc5.6545-win64.exe (with experimental audio recording). All same latency.
roll wrote:
Sun Apr 22, 2018 12:10 pm
Yes, I tried lmms-1.1.3-win64.exe, lmms-1.2.0-rc5-win64.exe and lmms-1.2.0-rc5.6545-win64.exe
Could you try one of the '32'' -it would be good to know if this is a win64 specific issue.
I just tried lmms-1.1.3-win32.exe (ASIO: no latency, SDL: latency) and lmms-1.2.0-rc5.6545-win32.exe (SDL: latency), so: same issue.
roll wrote:
Mon Apr 23, 2018 5:35 pm
I just tried lmms-1.1.3-win32.exe (ASIO: no latency, SDL: latency) and lmms-1.2.0-rc5.6545-win32.exe (SDL: latency), so: same issue.
Thank you!