2016年5月23日 星期一

How to solve the noise "Bi Bi Bi " of Grabber card in WINDOWS / MAC


The UAC audio "Bi Bi Bi...." is due to the sampling rate.




The sample rate of audio from the HDMI machine are  44.1khz  / 48khz.

The audio sample rate in the PC ( windows / MAC ) must equal the audio  sample rate of HDMI


For eample:


if audio  sample rate of hdmi is  44.1Khz and UAC audio  44.1Khz in the PC, the audio will be normal


if audio  sample rate of hdmi is  48Khz and UAC audio 48Khz in the PC, the audio will be normal


If audio sample rate of hdmi is  44.1Khz and UAC audio  48Khz in the PC, the audio will happen "Bi Bi" noise.


If audio sample rate of hdmi is  48Khz and UAC audio  44.1Khz in the PC, the audio will happen "Bi Bi" noise.


How to Change audio sampling rate in WINDOWS?

step 1: audio setting

 step2:  find out the  USB audio device ( HD TV CAM)

 


step3:  advance setting










How to change audio sampling rate in MAC OSX?

search ap "midi"




you can select 44.1khz or 48khz





Video demo



沒有留言:

MEVO Start直播攝影機開箱測試 |臉書1080p直播 | USB webcam模式 | NDI模式 | HDMI輸出接導播機ATEM MINI

前幾天有一個外國人問我是否MEVO Start 直播攝影機是否可以轉成hdmi 輸出 因此,我就花了一萬五千元買了一台MEVO Start 測試 MEVO Start 直播攝影機,的影像原始解析度非常高, 利用數位放大的方式,達成類似攝影機的PTZ ...