Publishers of technology books, eBooks, and videos for creative people

Home > Articles > Apple > Audio & Video

This chapter is from the book

This chapter is from the book

More Sound Advice

Waveform Tips

When you’ve used the View menu to display audio waveforms, iMovie HD’s timeline snapping feature snaps the playhead to silent portions of clips (specifically, when you scroll to within three frames of silence).

To work with more precision when viewing waveforms, zoom in on the timeline. If the audio in a track is on the quiet side, the waveform may be hard to see. Solution: select the audio clip and press the up-arrow key. This accentuates the spikes in the waveform. To make the spikes smaller, press the down-arrow key.

When you import an audio clip or music track, iMovie HD must render the track’s waveform—a red progress bar appears at the bottom of the audio track, and the waveform appears a bit blurry until iMovie HD renders it. Because this process takes some time, you may want to leave the waveform display turned off unless you need it for precise editing or volume adjustments.

Trimming Audio

You can trim the start and end of an audio clip using the same direct-trimming techniques described on page 232. As with video clips, you can reclaim audio that’s outside of a clip’s boundaries by resizing the clip.

Scrubbing Audio

Here’s a handy way to locate the exact spot to trim or split an audio clip. Zoom in on the timeline, then press the Option key while slowly dragging the iMovie HD playhead. Your audio plays back, but is slowed down. The sound even plays backwards when you drag the playhead to the left. (Beatles fans: import some White Album songs from your iTunes library and have fun.)

Extracting Audio

At times, you may want to use only the audio portion of a clip. For example, you’re making a documentary about your grandmother’s childhood and you’d like to show old photographs as she talks.

To do this, drag the video clip to the timeline, then select the clip and choose Extract Audio (1-J) from the Advanced menu. iMovie HD copies the audio, places it in Audio Track 1, and mutes the audio in the video clip.

Next, select the video clip in the timeline and press the Delete key. The video vanishes but its audio lingers on, and you can now position still images and other clips in the video’s place. You can also drag the audio elsewhere in the timeline.

Overlapping Audio in the Timeline

iMovie HD may provide just two audio tracks, but that doesn’t mean you’re limited to two simultaneous sounds. You can overlap multiple audio clips in the timeline’s audio tracks: simply drag one audio clip on top of another.

Repeating Sound Effects

You might want some sound effects to play for a long period of time. For example, iMovie HD’s Hard Rain sound effect is less than 10 seconds long, but maybe you need 30 seconds of rain sounds for a particular movie.

For cases like these, simply repeat the sound effect by dragging it from the Audio pane to the timeline as many times as needed. You can also duplicate a sound by Option-dragging it in the timeline. If the sound effect fades out (as Hard Rain does), overlap each copy to hide the fade.

You can build magnificently rich sound effect tracks by overlapping sounds. To create a thunderstorm, for example, drag the Thunder sound effect so that it overlaps Hard Rain. Add the Cold Wind sound while you’re at it. And don’t forget to use iMovie HD’s audio controls to fine-tune the relative levels of each effect.

Camcorder Sound Settings

Most miniDV camcorders provide two sound-recording settings: 12-bit and 16-bit. Always record using the 16-bit setting. If your sound and picture synchronization drift over the course of a long movie, it’s probably because you recorded using 12-bit audio.

Muting an Audio Track

You can mute an audio track entirely by unchecking the box to its right in the timeline viewer. If you uncheck the box next to the video track, iMovie HD mutes the video’s sound. This can be handy when you’re replacing the audio in a series of clips with an audio bed—a segment of background audio that will play across multiple clips.

Splitting Audio Clips

You can divide an audio clip into two or more separate clips whose position and volume you can adjust independently. First, select the audio clip you want to split. Next, position the playhead where you want to split the clip. Finally, choose Split Selected Audio Clip at Playhead from the Edit menu or press apple.gif-T.

  • + Share This
  • 🔖 Save To Your Account

Peachpit Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from Peachpit and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Peachpit products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites; develop new products and services; conduct educational research; and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email ask@peachpit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by Adobe Press. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.peachpit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020