Sound lag in OctaMED

JumpingJackson · 19 June 2015, 21:27

When I tap the keys on the keyboard, yes notes are played back but there is split second delay, like maybe 250ms.

Was watching this vid - [ Show youtube player ] and he's like key jazzing like a god!! As you can see his key taps are pretty low latency. How can I improve latency so I can be as awesome as he is?

I'm using the latest version of WinUAE 3.x on Windows 8.

Christian · 19 June 2015, 22:57

Try lowering the sound buffer to the minimum setting and using WASAPI or Portaudio as the sound device. You may need to download the Portaudio library from the Winuae website. Don't use Dsound.

quahappy · 20 June 2015, 00:23

I'm so glad you mentioned that, Christian! I noticed that too in OctaMED V4 - the delay is between keypress and sample playback. Also, some samples sound distorted where before, on my real Amiga back in the day, they were crystal clear. Yet, I've been using WinUAE for a number of years now but only recently started using OctaMED again and the problems mentioned come to light. (I did some music modules a long time ago and my old disks has recently been ADF-ed).

The above worked! The only other option I had to change as well, was Display > Settings > Native - Legacy VSync.

JumpingJackson · 20 June 2015, 00:48

Thanks Christian. I'll give that a go.

One thing I noticed as well is a problem with volume levels. May just be my speakers but my copy came with a sample mod called 'fairlight'. The melody sounds really low in the mix, can barely hear it. But on FA-UAE on OSX it sounds much better (plus no lag, macs are generally better for that!).

Leandro Jardim · 20 June 2015, 01:44

Quote:

Originally Posted by Christian

Try lowering the sound buffer to the minimum setting and using WASAPI or Portaudio as the sound device. You may need to download the Portaudio library from the Winuae website. Don't use Dsound.

Whats the function of the sound buffer slider when we use WASAPI and PortAudio? Its different than with DSound? I remember Toni saying the sound buffer slider only has function with DirectSound, but I am not sure. Anyway its really an excellent tip, I will try it with games too, thanks.

Toni Wilen · 20 June 2015, 07:45

The smaller the buffer, the shorter the latency. Minimum value (before glitches appear) depends on lots of variables, API type, etc.. Sound card can also make a difference, most on-board chips are crappy cheap realteks with crappy drivers, not optimized for real time streaming with tiny buffers.

Note that you usually get more latency if you use "legacy" vsync.

JumpingJackson · 23 June 2015, 20:13

Finally got to try it out. Reduced buffer size to 2 and it works great now, thanks!

19 June 2015, 21:27	#1
JumpingJackson Registered User Join Date: Feb 2008 Location: UK Posts: 123	Sound lag in OctaMED When I tap the keys on the keyboard, yes notes are played back but there is split second delay, like maybe 250ms. Was watching this vid - [ Show youtube player ] and he's like key jazzing like a god!! As you can see his key taps are pretty low latency. How can I improve latency so I can be as awesome as he is? I'm using the latest version of WinUAE 3.x on Windows 8.

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19 June 2015, 22:57	#2
Christian Zone Friend Join Date: Aug 2005 Location: Gloucestershire Age: 51 Posts: 218	Try lowering the sound buffer to the minimum setting and using WASAPI or Portaudio as the sound device. You may need to download the Portaudio library from the Winuae website. Don't use Dsound.

20 June 2015, 00:23	#3
quahappy Born again WinUAE user Join Date: Mar 2006 Location: South Yorkshire, UK Age: 55 Posts: 1,667	I'm so glad you mentioned that, Christian! I noticed that too in OctaMED V4 - the delay is between keypress and sample playback. Also, some samples sound distorted where before, on my real Amiga back in the day, they were crystal clear. Yet, I've been using WinUAE for a number of years now but only recently started using OctaMED again and the problems mentioned come to light. (I did some music modules a long time ago and my old disks has recently been ADF-ed). The above worked! The only other option I had to change as well, was Display > Settings > Native - Legacy VSync.

20 June 2015, 00:48	#4
JumpingJackson Registered User Join Date: Feb 2008 Location: UK Posts: 123	Thanks Christian. I'll give that a go. One thing I noticed as well is a problem with volume levels. May just be my speakers but my copy came with a sample mod called 'fairlight'. The melody sounds really low in the mix, can barely hear it. But on FA-UAE on OSX it sounds much better (plus no lag, macs are generally better for that!).

20 June 2015, 07:45	#6
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,506	The smaller the buffer, the shorter the latency. Minimum value (before glitches appear) depends on lots of variables, API type, etc.. Sound card can also make a difference, most on-board chips are crappy cheap realteks with crappy drivers, not optimized for real time streaming with tiny buffers. Note that you usually get more latency if you use "legacy" vsync.

23 June 2015, 20:13	#7
JumpingJackson Registered User Join Date: Feb 2008 Location: UK Posts: 123	Finally got to try it out. Reduced buffer size to 2 and it works great now, thanks!

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