Exercise 1



center000BSc (Hones) in Information Technology Specialized in Interactive MediaBatch 2016Multimedia SystemsLab Sheet 4 IT 141117138 R.AbhiyugaaExercise 1 Task 1Go online and locate three sound editors (either from a shareware site or demo versions of commercial software). Document their capabilities.What file formats can they import from and export to? How many tracks can they handle? What DSP effects do they provide? 1. Audacity Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. The interface is translated into many languages. You can use Audacity to: Record live audio. Record computer playback on any Windows Vista or later machine. Convert tapes and records into digital recordings or CDs. Edit WAV, AIFF, FLAC, and MP2, MP3 or Ogg Vorbis sound files. AC3, M4A/M4R (AAC), WMA and other formats supported using optional libraries. Cut, copy, splice or mix sounds together. Numerous effects including change the speed or pitch of a recording. 2. Wavosaur This compact free audio editor and recorder doesn’t need to be installed and can run on Windows 98, XP, and Vista. It has a good set of tools for editing digital audio files, has several useful effects, and can handle MP3, WAV,OGG, aif, aiff, wavpack, au/snd, raw binary, Amiga 8svx & 16svx, ADPCM Dialogic vox, and Akai S1000 audio formats. 3. WavePad Sound Editor Wavepad Sound Editor is a feature-rich program that supports a good selection of file formats; this includes mp3, wma, wav, flac, ogg, real audio, and more. The program has all the familiar tools in order to edit audio files (cut, copy, and paste) and can use VST plugins to extend its capabilities. You can use it for noise reduction, click/pop removal, and adding effects like echo and reverb.Exercise 2 Task 2Record two sounds using a simple recording device—a cassette recorder will work. One sound should be of speech, and one should be music. Connect the output from the recorder to a computer’s audio input. Using a sound capture and editing tool, capture both clips in 44 kHz, 16-bit stereo (if you can’t record in stereo, ignore the applicable directions). Download and install “VUMeter” or similar tool and monitor the sound input.Capture the clips three times—once at a very low level, once at the correct level (just below peaking), and once at levels that are well over the maximum. Listen to the six clips. Note your observations regarding noise and distortion. Run all three clips through the editor’s Normalize effect.Listen to the clips again and note your observations.Down-convert the two normalized samples recorded at the correct level to 22.05, 11, and 5 kHz. Convert each of these eight (four sampling rates × two files) to mono. You should now have 16 different files: 8 of the speech and 8 of music. Document the file size of each, and make a note of how each sounds (even better, enlist the aid of someone else who can listen while you play the sounds back, without telling them which you are playing). Which are acceptable? At what point does the lowered quality become unacceptable?Exercise 3 Task 1Visit three web sites that use sound (you may need to find Flash-based web sites). Where, when, and how is sound used? Does the sound fit the mood of the site? Is there background sound? Can the sounds be turned on and off? Document your findings. interactive multimedia website Pharrell Williams presents ”Happy” — the world's first 24 hour music video. The site is very interactive and pleasant with the use of media. In this site sound is played while entering to the site itself. This site is a comedy site about Rajnikanth. The site is very interactive and pleasant with the use of media. Can switch off and on music. Waterlife is a showcase for the documentary film of the same name that offers its audience a wonderful preview of the lush cinematography and rich storytelling found in the film. The true genius of the site, however, is found in its fluid navigation that recalls the gentle motion of a lake. Can switch off and on music. Task 2Locate three web sites that offer “royalty-free” or “buyout” music. Such sites almost always allow visitors to listen to low-quality samples. i. What formats are the samples provided in? Mp3 and Online Listening ii. Listen to some of the samples. Try to identify which are synthesized and which are actual instruments playing the music. Some tracks use real instruments Some used electronic based instruments. iii. What are the license arrangements for using the music? Tracks that you buy can’t be shared among others iv. Document your findings, noting the various lengths and formats the music is provided in. The formats can be requested in .MP3, .FLAC, .WMA, .AAC, .M4R The track sizes may be changed according the format The lengthier the song the bigger the file. Music tracks can be Originals, extended versions, Remixes, Covers. Music tracks may differ in price according to the artist. Task 3Visit any local web site for music and check the licensing terms for different uses of musical compositions and recordings of music. me.lk “The Products transacted through the Service are licensed, not sold, to you for use only under the terms of this license, unless a Product is accompanied by a separate license agreement, in which case the terms of that separate license agreement will govern, subject to your prior acceptance of that separate license agreement. The licensor (“Application Provider”) reserves all rights not expressly granted to you. The Product that is subject to this license is referred to in this license as the “Licensed Application.”Briefly describe the terms for using music for which you have created a performance, for using a recording of a piece of music in a multimedia program, and for selling a product that contains music.When playing the track the credit should be given to owner. No changes can be done without permission of owner. When using the track for any other purpose the credit should be given. The track can’t be sold, reproduce or transferred without permission. Identify differences in rates for use of music in different types of media (for example, using as part of a one-time presentation to a limited audience, using in a multimedia product for commercial release, and using as part of a radio or TV broadcast or RING TONES). ................
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