Luwei Yang

I am a MAX MSP learner. I find that when I use sfplay~, play~ and index~ to play audio file (.wav), there are always kind of white burst noises companied. Does anybody find the same thing?

I found a long time ago topic about this 

https://cycling74.com/forums/very-annoying-sfplay-noise-bursts/

I found a long time ago topic about this https://cycling74.com/forums/very-annoying-sfplay-noise-bursts/ .

playback-issue-in-intel-mac-relating-to-sfplay-play-and-index

I think I may find a way to resolve it. If I change the "Drive" in the "Audio Status" from "Core Audio " to "ad_portaudio Core Audio", the noises have been gone.

Strange. Can you provide an example patch? And what is your "I/O Vector Size" and "Signal Vector Size"?

The simple sound patch like using the cycle~ would also give these noises. It seems like any patch that generates sound would have that.

Finally, I find where is the problem. The noises come when the "CPU % Limit" is set to 1. When the "CPU % Llimit" is set to other value other than 1, the noises are gone. I found "ad_portaudio Core Audio" can resolve the problem due to the "CPU % Limit" was set to 0. But in "Core Audio", it was set to 1.

I am still confused about the reason for this.

Here are parameters:
I/O Vector Size: 512
Signal Vector Size: 64

Finally, I find where is the problem. The noises come when the  "CPU % Limit" is set to 1. When the "CPU % Llimit" is set to other value other than 1, the noises are gone. I found "ad_portaudio Core Audio" can resolve the problem due to the "CPU % Limit" was set to 0. But in "Core Audio", it was set to 1.

playback issue in intel-Mac relating to sfplay~, play~ and index~