Adobe 25520388 User Guide - Page 236

USING ADOBE PREMIERE PRO 231 Editing Audio Set source In and Out points for a split edit Although it's common to create split edits after clips are assembled into a rough cut, it's possible to trim clips for split edits in the Source Monitor before adding them to the sequence. 1 Open a clip in the Source Monitor, and set the current time to the frame you want to set as a video or audio In or Out point. 2 In the Source Monitor, choose Marker > Set Clip Marker, and select Video In, Video Out, Audio In, or Audio Out. 3 Set the remaining video and audio In and Out points. (When you add the clip to a sequence, the video portion starts and ends at different times than the audio.) Recording audio You can record to an audio track in a new sequence or record to a new audio track in an existing sequence. The recording is saved as an audio clip that's added to your project. Before recording audio, make sure that your computer has sound inputs. Premiere Pro supports ASIO (Audio Stream Input Output) devices (Windows) and Core Audio devices (Mac OS). Many devices have connectors for connecting speaker, microphone cables, and breakout boxes. If your computer has an ASIO or Core Audio device for connecting sound input devices, make sure that the sound device settings and input volume level options are properly set. Refer to your operating system's Help for details. In Premiere Pro, set the default device options in the Audio Hardware Preferences for specifying the input channel used when recording. Once you connect input devices and make all preliminary settings, you can use the Audio Mixer in Premiere Pro to record audio. Use controls in the Audio Mixer to adjust the monitoring levels. An audio clip is created from the recording and is added to both the Timeline and Project panels. See Andrew Devis tutorials "Audio Recording 1: Setting Up to Record Narration" and "Audio Recording 2: Recording Narration." Capturing analog audio If you want to use audio that isn't yet in digital form (for example, from an analog cassette or a live microphone), you need to digitize it through an audio or audio/video digitizer/capture card. The quality of digitized audio and the size of the audio file depend on the sample rate (the number of samples per second) and bit depth (the number of bits per sample) of the digitized audio. Also, stereo audio requires twice as much disk space as mono audio. These parameters, controlled in the Capture section of the Project Settings dialog box, determine how precisely the analog audio signal is represented in digital form. Higher sample rates and bit depths reproduce sound at higher levels of quality, but with correspondingly larger file sizes. Capture audio at the highest quality settings your computer can handle, even if those settings are higher than the settings you'll specify for final export or playback. This provides headroom, or extra data, that helps preserve quality when you adjust audio gain or apply audio effects such as equalization or dynamic range compression/expansion. Although the DV format can record two independent stereo audio pairs, Premiere Pro can capture only one stereo pair. It may be possible to select either stereo pair 1, stereo pair 2, or a mix of both, depending on the DV hardware you use. For details, see the documentation for the DV hardware. Last updated 1/16/2012