Adobe AUDITION 1.5 - Manual (Page 240)

CHAPTER 11 232
Saving, Exporting, and Closing Files
Some formats provide options for saving audio data. Click Options in the Save As dialog
box to access these options.
Note: If you want to save files in a format that’s not listed here, you may be able to do so by using
an ACM Waveform codec. For more information, see “ACM Waveform (.wav)” on page 233.
64-bit doubles (RAW) (.dbl)
This format uses 8-byte doubles in binary form—8 bytes per sample mono, or 16 bytes
per sample stereo interleaved. The 64-bit doubles format has no header—it’s purely audio
data, just like the raw PCM format.
8-bit signed (.sam)
This format is popular for building MOD files, since audio in MOD files is 8-bit signed.
Many MOD editors allow samples to be inserted from or exported to files in this format.
Files with the .sam extension contain 8-bit signed raw data, and by default, they have no
headers. The sample rate starts off as 22050 Hz, but you can change the sample rate after
you open the file by choosing Edit > Adjust Sample Rate.
A/mu-Law Wave (.wav)
The A-Law and mu-Law WAV formats (CCITT standard G.711) are common in telephony
applications. These encoding formats compress the original 16-bit audio to 8-bit audio
(for a 2:1 compression ratio) with a dynamic range of about 13-bits (78 dB). While A-Law
and mu-Law encoded waveforms have a higher signal-to-noise ratio than 8-bit PCM, they
also have a bit more distortion than the original 16-bit audio. Still, the quality is higher
than you would get with some 4-bit ADPCM formats.
Note: Files saved in this format expand automatically to 16-bits when opened, so you
shouldn’t save 8-bit files in this format.
Options Choose from the following:
• A-Law 8-bit is a slight variation of the standard mu-Law format and is found in
European systems.
• mu-Law 8-bit is the international standard telecommunications encoding format and
is the default option.
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