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Creating MP3 files from speech dictation recordings is necessary for those who have not yet made the switch to digital voice recorders (see our sections on Digitizing Sound and Transcription Files). Like DSS (the file format for digital voice recorders), MP3 audio files are are highly compressed - about one-twelfth the size of Windows waveform files - and are therefore ideal for transferring over the Internet. Playing and creating MP3 files requires the following programs:
MP3 Line-In Recorders are companion programs found within MP3 Makers. The principal function of the MP3 Maker (commonly referred to as a "ripper") is to grab - or rip - audio tracks from a CD in your CD-ROM player, transferring these to the hard drive of your computer as Windows waveform files. An MP3 Encoder, another utility generally found within the MP3 Maker, is then used to convert these same Windows waveform (.wav) files to highly compressed MP3 (.mp3) files. As we are concerned with creating MP3 files from sources other than CDs, however, it is essential that the ripper, or MP3 Maker program, contain an MP3 Line-In Recorder, a utility that allows recordings - such as those from external tape dictation devices - to be created in MP3 format. MP3 Makers Adjusters Asia has tested two of the most popular MP3 Makers (rippers) on the market, MusicMatch Jukebox and Audiograbber, each of which was found to contain the following features:
Of the two, only MusicMatch Jukebox was found to contain a built-in MP3 Player. This, however, should not deter you from the Audiograbber product, in that one of the best MP3 players on the market, a product by Winamp, is available free of charge and integrates perfectly with Audiograbber. Test results for the 2 programs were virtually identical, with each permitting direct MP3 recording at (a) high compression/low quality for speech files; or at (b) low compression/high quality for CD comparable music files. One disappointing finding with each program was the absence of a Pause button on the MP3 Recorder. Stopping and then restarting the Recorder creates an entirely new track (file), with the result that if you intend to do microphone to PC recording, Windows own Sound Recorder program would be a better option. For software with advanced recorder control functions, visit Cakewalk or Sonic Foundry, both leaders in professional digital audio editing products. One particular product by Cakewalk Cakewalk Pyro along with a second by Sonic Foundry Sound Forge XP Studio appear to have all the necessary MP3 recorder functions. The CD-ROM developers at Adjusters Asia currrently use the Sound Forge 5.0 product by Sonic Foundry. At a cost of US-$350.00, however, this product is recommended only for professionals looking to create studio quality sound tracks. Below are the prices for the other products mentioned in this section: US-$ Review the product specs and download trial versions of the software by clicking the links below:
Caution Freeware and shareware applications often contain spyware, an intrusive little utility that monitors your travels on the web and then relays this information back to the developers. From there, the information is generally sold to advertisers who, after adding your name to a spam list, proceed to bombard you with unwanted e-mail advertisements. The more destructive and dangerous versions of these stealth utilities are programmed to scan the files on your hard drive or worse monitor keystrokes, such as those used for passwords and credit card information. Whenever possible, never download freeware programs buy the full version. If you suspect that spyware is active on your computer, click the link below for information on removing these hidden applications. Spyware Removal Information To search for similar MP3 products, enter the words mp3 maker in the text box of your favourite search engine. After installing the Maker/Recorder program, select from the following to begin creating MP3 files:
Microphone to PC recording is not recommended for professionals, as this requires constant use of a mouse as well as interaction with a software control panel. Use the Line-In Recording method or - better still - treat yourself to a new digital voice recorder (see our section on Digitizing Sound). Important: Speech dictation (transcription) files should never be recorded in Stereo Mode at High Quality. Use this setting only when creating CD quality music tracks. For speech dictation files, adjust the settings on your MP3 program to record in Mono at Low Quality no higher than 32 kBit/s, 22,050 Hz, as these files are less than half the size of MP3 stereo recordings.
Important: Speech dictation (transcription) files should never be recorded in Stereo Mode at High Quality. Use this setting only when creating CD quality music tracks. For speech dictation files, adjust the settings on your MP3 program to record in Mono at Low Quality no higher than 32 kBit/s, 22,050 Hz, as these files are less than half the size of MP3 stereo recordings.
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