#PRAAT NO SOUND FULL#

Kay: The format used by the Computer Speech Laboratory (Kay Corporation).

FLAC: An open source lossless compression format.

Binary: a standard format for sound files, independent of computer system (if nothing else works, this could be a way of exporting data to other programs on other systems).

Praat reads and saves uncompressed AIFC files, but does not support compressed AIFC files.

AIFC: A variant of the AIFF file format for Macintosh that is capable of compression.

Praat handles the following uncompressed and lossless-compressed sound file formats

A filename like dagestaniMP3.wav will always remind you how the degraded recording was originally acquired. Better still, include and keep the method in the filenames you choose.

#PRAAT NO SOUND FULL#

Log all lossy-compressed recordings and subsequent converted sound files as having been compressed at some time, so that no-one will think they are full quality.Make comparative tests before you do fieldwork, to make sure that the specific speech characteristics you intend to measure have not been degraded.Some mini recorders will also do uncompressed recordings if so, ignore the lossy settings.Remember that field expeditions are costly cheap lossy recorders are not true savings.If you are nevertheless tempted to use lossy mini recorders:.The advantage of conversion is that there is no additional degradation each time you work on your file and save it again. Note that converting a lossy-compressed sound file to a lossless sound file, say MP3 to WAV, does not improve or restore the existing degradation of the MP3, the poorer quality MP3 file simply becomes a poorer quality WAV file.

Lossy compression is usually achieved by degrading the lower frequencies and the higher frequencies, which usually renders the recording useless for speech research. Worse still, every time a lossy-compressed file is edited and saved anew there is further deterioration. Lossy compression discards information that can never be restored and inevitably means poorer sound quality when decompressed.

Lossless compression is useful for speech analysis because it preserves the original recording intact.

Lossless compression does not discard any information, and is reversible, recovering all the original sound data when decompressed.

There are two kinds of compression, lossless and lossy.

Consequently ways have been devised to compress sound files to smaller sizes.

The large size of sound recordings means they occupy a lot of disk space, and makes it time-consuming or impractical to send them round the web, especially by e-mail).

One minute of mono telephone quality (8000Hz sampling, 16-bit) is just 1MB.

One minute of CD stereo quality (44100Hz sampling and 16-bit resolution) is around 10MB.

speech recordings need at least 20000Hz sampling to capture, hifi recordings need higher sampling rates than 40000Hz).

Sound files can be very large, depending on time and sampling rate (e.g.

Praat no sound