談錄音...

[Leo Yeh]

A B Stereo 也稱為 Spaced Pair
(1)都常會使用兩隻電容式麥克風
(2) 若兩支麥克風的距離越遠，立體聲的寬度會越寬
(3) 在兩隻麥克風中間的樂器定位就會在中間，若樂器不在中間，雖然兩隻麥克風收到的聲音差不多，但靠近樂器的那隻會先收到音樂，會有相位差的問題，也就是重播時定位會跑掉
(4) 若兩隻麥克風距離太近，那立體聲的音場又會過小，也會太強調在中間樂器的聲音
(5) 可在中間加一隻麥克風再混音改善這問題 (Decca Tree?)

http://www.deltamedia.com/resource/s...echniques.html


Spaced Pair
With this method (also called AB), you place two identical mics a few feet apart and aim them straight ahead (Figure 4). The mics can have any polar pattern, but omni is most popular for this method. The greater the spacing between mics, the greater the stereo spread.

Figure 4. Spaced-pair technique.