User Manual

Audio Applications 3.0 User Guide
_________________________________________________________________________
_________________________________________________________________________
The Audio Recorder Page 12
3: The Audio Recorder
Introduction
The Audio Recorder enables you to record, compress, store and playback
voice, music, and other sound. It provides settings for sound attributes such
as mono/stereo, compression level, and sampling rate. You can use it to
embed sound objects in documents created in applications that support object
linking and embedding (OLE). The Audio Recorder's record, edit and
playback capabilities are compatable with the Windows Sound Recorder and
other recorders that record and playback in the PCM format.
The Audio Recorder can record to and playback from both .WAV and .AUD
formats. .WAV is the Microsoft Windows 3.1 audio file format. The .AUD
format uses ESPCM/ADPCM compression to produce an audio file. The
Audio Recorder provides a choice of linear PCM, ADPCM and low, medium
and high ESPCM compression.
The following chart shows the capabilities of the AudioDrive on-chip
compression/decompression feature:
Compress/Decompress Format ES688 ES1488 ES488
ESPCM Low (4-bit) Record Yes Yes Yes
ESPCM Low (4-bit) Playback Yes Yes Yes
ESPCM Medium (3-bit) Record No No No
ESPCM Medium (3-bit) Playback Yes Yes Yes
ESPCM High (1-bit) Record No No No
ESPCM High (1-bit) Playback Yes Yes Yes
ADPCM Record No No Yes
ADPCM Playback Yes Yes Yes