Audio Recording format
i-Sound recorder support few popular output formats including MP3, WMA, WAV, APE and OGG.
There are three categories of audio formats - uncompressed, lossless and lossy.
- Uncompressed Audio Formats
WAV - (WAVE), short for Waveform audio format, is a Microsoft and IBM audio file
format standard for storing audio on PCs. It is the main format used on Windows systems
for raw audio. The most common WAV format contains uncompressed audio and uncompressed
WAV files are quite large in size, so, it has declined in popularity. WAV files are
probably the simplest of the common formats for storing audio samples. Unlike MPEG
audio and other compressed formats, WAVs store samples "in the raw" where no
pre-processing is required other that formatting of the data. The WAV file itself
consists of three "chunks" of information: The RIFF chunk which identifies the file
as a WAV file, The FORMAT chunk which identifies parameters such as sample rate and
the DATA chunk which contains the actual data (samples).
Players Supported: iPod, iPhone, Creative Zen, PSP, Blackberry, Cowon, iRiver
- Lossless Audio Formats
APE - (monkey's audio) A file with the extension .ape, is an audio file compressed
using Monkey's Audio. Monkey's Audio is a lossless compression, which means it does not
permanently discard data during compression. It achieves compression rates of around 40%.
Since it is lossless, the quality of the audio after compression will be the exact same.
And we can only convert the CD and uncompressed WAV to APE for the moment, MP3 is not
available. Officially, Monkey's Audio is only available for the Microsoft Windows
Players Supported: Zune, Cowon, iRiver.
- Lossy Audio Formats
MP3 - is an acronym for MPEG-1 (or MPEG-2) Layer 3 audio encoding (it is not an
acronym for MPEG-3). MP3 is a popular compression format used for audio files on
computers and portable devices.
Players Supported: iPod, iPhone, Zune, PSP, Creative Zen, Blackberry, Archos, Cowon, iRiver
WMA - (Windows Media Audio) is an audio data compression technology developed by
Microsoft. It can be played by Windows Media player, RealPlayer, Winamp, Windows Movie
Maker, and the Microsoft Zune media management software supports most WMA codec. Its
audio quality is better than mp3 when the bitstream is below 128kbps, but won't get
much improvement when the bitstream gets higher.
Players Supported: Zune, Creative Zen, Blackberry, Cowon, iRiver, Archos, PSP
OGG - Ogg is the name of an open source multimedia project maintained by the xiph.org
foundation. OGG Vorbis refers to the lessee general purpose audio compression format
that surpasses mp3 in quality and rivals new formats such as AAC and TwinVQ (a.k.a. VQF).
Players Supported: Zune, Cowon, iRiver
Bit Rate - Bitrate or Bit rate is the average number of bits that one second
of audio data will consume. Higher bitrate means bigger file size and generally better
audio quality while lower bitrate means lower file size but worse audio quality.