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Frequently Asked Questions

How to get compressed audio track using AVIEncoder?

AVIEncoder FAQ
The current versions of @ctiVideo and AVIEncoder only support PCM audio formats. There are plans for future versions to support audio compression CODECs.
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Why does a call using a compressed audio codec use much more bandwidth than expected?

Vox Gratia FAQ
The "headline" bitrate of a audio codec does not include the overhead added by RTP and UDP encapsulation. This overhead means that a compressed code like GSM (with an advertised bit rate of 13200 bits/second) actually consumes 29200 bits/second, while an uncompressed codec like G.711 (with an advertised bit rate of 64kbps) actually consumes 75kbps. For a detailed explanation of how to calculate the actual bit rate for an audio codec, see http://www.voxgratia.org/docs/codecbw.html
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Is the audio content compressed or uncompressed?

DVD Video Planet - Dvd-audio Faq
The DVD-Audio format is designed to deliver the highest audio fidelity possible. No lossy audio compression is used on any primary audio content on a DVD-Audio. However, uncompressed audio files tend to be large, and they require high bandwidth for delivery. Because of these constraints, as an option to the content provider, the DVD-Audio format features a special form of loss less compression called Meridian Loss less Packing (MLP).
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Can Opera browse compressed pages using gZip encoding?

Opera 5 for Symbian: Browser functionality
No, unfortunately Opera 5 for Symbian does not inherit this functionality from the desktop versions. It can only interpret and display pages sent as normal, uncompressed ASCII text. Similarly, Opera 5 only includes support for standard markup languages and protocols such as HTTP, HTML, WML, etc.
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How do I compress audio using QuickTime?

QDESIGN : Frequently Asked Questions
To compress audio you will need the QuickTime Pro Player from Apple Computer, or any other application which supports QuickTime export in order to encode audio. If you are using QuickTime Pro please follow the instructions found below. If you are using another application please follow the instructions that accompany the software.
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Can the video and audio be compressed with different methods?

WideSAN - Digital video for you!
Yes, the system is flexible enough to allow for different codecs. For example Dolby Digital audio could be used for 6 channel surround sound.
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How can I switch to a different audio track in MP4, MKV and OGM files?

Answers to Frequently Asked Questions
You should see a white icon in your system tray (right-bottom of your screen). That is Haali Media Splitter. Right-click on that icon to switch between the audio tracks that are in the file.
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How do you stream audio using Java Sound?

Frequently Asked Questions
Java Sound can begin playing as soon as it starts getting audio samples or MIDI requests -- there is no need to wait for the entire audio file to be loaded into memory. Java Sound can be used in conjunction with the Java Media Framework API software (JMF) to stream audio data over the network. Third parties can also use Java Sound to present audio within their own streaming framework.
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I want to extract each audio channel separately from a multi-channel audio track. How do I do it?

Miraizon Cinematize 2 FAQ
If you have a DVD with a multi-channel audio track such as Dolby 5.1 (6 channels), Cinematize 2 automatically downmixes the audio to 2 channel stereo upon extraction. With Cinematize 2 Pro, you have the ability to instead decode all the channels separately. All you need to do is to choose "Decode All Channels" under the Downmixing option on the Audio tab. The result will be a set of individual mono audio files, each labeled with the channel identifier.
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My editing program will not import my MPEG audio track. What should I do?

Miraizon Cinematize 2 FAQ
You can decode one or two channel MPEG audio into AIFF or WAV format using iTunes. The resulting files should import correctly into editing programs. Here is the process to create AIFF files using iTunes.
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How do I track my audio book purchase?

Simply Audiobooks - FAQ
When your purchase is processed you will receive a confirmation email which includes a tracking number which can be used to check delivery status. If your purchase has not moved in five days, please contact Member Services and we will help resolve the delivery issue.
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Is it possible using CDex to merge several track into one single WAV/MP3 file?

FAQ - Frequently Asked Questions | CDex
What you can do is to to select several tracks, and hit the partial track copy, with this option you can select a range which is ripped/encoded into one big file.
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Is it possible to record the drum track or a bass track on the audio track?

FAQ menu
It is possible. Using the bounce function, you can record the drum/bass track to any audio tracks. At this time, you should mute the other audio tracks. Also, an effect also can be used on the drum/bass sound. A rhythm pattern is stored in memory for each project. After saving an original rhythm pattern, you can import it into your new project. With a digital mixer, the appeared fader position can be different from the actual parameter value.
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Is it possible to add drum track on the existing audio track that has no drum track?

FAQ menu
Actually it is very difficult to make synchronized song data for existing (recorded) audio tracks. Please fix tempo first when you start recording, even rhythm is only metronome. For your emergency purpose, you can over-dub drum sound onto your existing audio tracks, using bounce function. Bounce all tracks to track 5&6 while you hitting drum pads. Accordingly drum sounds are recorded to track 5, and other audio tracks are mixed to track 6.
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Why can't the "SSF to AVI, no recompression" handle compressed audio?

Showshifter Support - Frequently Asked Questions
It can but it will run into problems if it has to split the new AVI files into more than one segment. Some audio compressors embed fake data at the start of their audio streams or massage the audio in the stream into "frames" making it difficult to safely split the audio stream from one file segment to the next without first decompressing the audio.
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Can NEMO tents be inflated using compressed air?

NEMO: Airbeam Tents FAQs
Yes, but only with a NEMO approved inflation system. One of the great things about NEMO inflatable tents is that they are designed to be functional at low pressures and therefore don't require heavy pumps or compressed air for inflation. In turn, compressed air systems may be used for extremely rapid deployment, but they will need a regulator or blow-off valve to insure that the pressures do not exceed 9psi.
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Are there any disadvantages to using Bloom filter (compressed) updates?

Globus Toolkit RLS FAQ
Despite the significant advantages of using Bloom filter (or “compressed”) updates, there are two disadvantages that should be understood when using them. False Positives: There is a small chance (~1%) of getting a false positive when querying the RLI for an LFN. When developing RLS client applications, we recommend that the client validate that the LRC does contain the LFN.
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Can these compressed PDFs be read using Acrobat Reader 4?

CVISION Technologies
Yes and No. Since the JBIG2 standard was introduced after Acrobat Reader 4 was released, there is no support for this filter in Acrobat 4. However, PdfCompressor also supports an "Acrobat4-compliant" mode which uses optimizations strictly within Acrobat 4, i.e., relies on the PDF 1.3 specs. In this mode, no JBIG2 streams are generated and the PDF is viewable using both Acrobat 4 and Acrobat 3.
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Q:Why do I hear audio feedback when using NetMeeting? How do I turn off the recording feedback?

FAQ
kX Audio driver enables 'What you hear' recording mode by default. In order to turn it off, open the kX Mixer, and set Wave and Synth recording levels to the appropriate values on the 'Recording' page.
Related Questions

Who is using MPEG-1 AUDIO?

MPEG-1 Video
Philips uses MPEG for their new digital video CD's. They say they will start shipping movies and music videos on CD's for their CD-I player by the end of this year. MPEG is accepted by Eureka-147. That means that when digital radio broadcasts starts in Europe a couple of years from now, you will receive MPEG coded audio.
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How do I save the new DeVocalized audio track?

DART - Digital Audio Restoration Technology
When tuning is finished, you can create your DeVocalized file by saving the results in a separate soundfile. To start saving the new audio file, press the Process button. To change the name of the output file to be created, press the Change button and type in a new name. When the output (devocalized) file is produced, you can display it in the Soundfile Window by clicking the radio button situated to the left of its name.
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How can I change the name of the final performance audio track?

DART - Digital Audio Restoration Technology
Click on the "Change" button toward the bottom of the Producer window, next to the "Output File" listing. Enter the name you want to use and hit "Enter" or "Save".
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How do I upload a video/audio track?

FAMECAST - FAQ
To upload a video/track, you must be registered as an Artist and logged into your account. In your Artist Account Manager, click the Add Video or Add Audio button located in the upper-right corner of your Media List. To ensure your video/track is entered into the competition, be sure to select the appropriate genre(s) and sub-genre(s) in Step Two.
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How do I embed a video or audio track?

FAMECAST - FAQ
To embed a video/track onto another web page, go to to the video/track and click the box of code located directly beneath the video player, next to the word "Embed". The line of code should highlight fully with one click. Then copy/paste the code into your web site, blog, MySpace profile, etc. For example, to embed a video onto your MySpace page, log into MySpace and click Edit Profile.
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How do I import a track from an audio CD?

FAQ - Audacity Manual
Audacity cannot import a track directly from an audio CD. You must use a separate program like CDex or iTunes? to extract CD tracks into a format that Audacity can read, like WAV or AIFF. On Mac OS X computers, CD tracks appear in Finder as AIFF files so can be imported directly into Audacity. For more help on importing audio from CD tracks on both Windows and OS X, see our Wiki help page on How_to_import_CDs.
Related Questions

What is compressed yeast?

Land O'Lakes: FAQs (Frequently asked questions)
This form of yeast comes as a moist cake that weighs about 2/3 of an ounce. It is light grayish-tan in color and crumbles readily. Store the fresh yeast up to 2 weeks in the refrigerator. In the freezer, it will keep about 2 months.
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audio_play: How can I play audio messages locally using /dev/audio?

FAQ for isdn4linux: audio: Handling Voice with ISDN
This is best achieved with vbox using format 6 (uLaw - must be compiled in). You can then easily play the messages using: cat xxx /dev/audio where xxx is the message-file. The standard tool for converting all sound formats is SOX. SOX is available as source code for both UNIX and DOS. You can get it at:
Related Questions

Can I record my vocal track while playing back my DeVocaled audio track?

DART - Digital Audio Restoration Technology
Can I start recording my vocal BEFORE the song starts playing? (i.e. start the recording and playback separately)
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