CW-Opus 1.6.1.0
Exact Audio Copy setup
Cole Williams Software Limited

OVERVIEW
========

CW-Opus can be used as a User Defined Encoder in Exact Audio Copy.

The current recommended EAC profile uses CW protective cVBR at 256 kbit/s with
maximum encoder complexity.

EAC CONFIGURATION
=================

Open:

  EAC -> Compression Options -> External Compression

Use the following settings:

  Use external program for compression:
    Enabled

  Parameter passing scheme:
    User Defined Encoder

  Use file extension:
    .opus

  Program, including path, used for compression:
    Point this to cw-opus.exe

Typical EAC Codecs installation:

    C:\Program Files (x86)\Exact Audio Copy\Encoders\cw-opus.exe

  Additional command-line options:

    -cvbr -b 256000 --complexity 10 --title "%title%" --artist "%artist%" --albumartist "%albumartist%" --album "%albumtitle%" --genre "%genre%" --date "%year%" --track "%tracknr%/%numtracks%" %source% -o %dest%

  Bit rate:
    Not used / command-line controlled

  Delete WAV after compression:
    Enabled

  Use CRC check:
    Disabled

  Add ID3 tag:
    Disabled

  Check for external programs return code:
    Disabled

CW PROTECTIVE CVBR
==================

With CW-Opus, -cvbr together with an explicit -b value enables CW protective
cVBR.

The requested bitrate acts as a minimum bitrate for eligible CELT frames while
retaining VBR behaviour above that floor.

Do not interpret this as ordinary constrained VBR with a target bitrate.

HIGH-QUALITY VBR ALTERNATIVE
============================

  -b 256000 --complexity 10 --title "%title%" --artist "%artist%" --albumartist "%albumartist%" --album "%albumtitle%" --genre "%genre%" --date "%year%" --track "%tracknr%/%numtracks%" %source% -o %dest%

STANDARD CONSTRAINED VBR
========================

Use -cvbr without an explicit -b value:

  -cvbr --complexity 10 --title "%title%" --artist "%artist%" --albumartist "%albumartist%" --album "%albumtitle%" --genre "%genre%" --date "%year%" --track "%tracknr%/%numtracks%" %source% -o %dest%

CONSTANT BITRATE
================

  -cbr -b 256000 --complexity 10 --title "%title%" --artist "%artist%" --albumartist "%albumartist%" --album "%albumtitle%" --genre "%genre%" --date "%year%" --track "%tracknr%/%numtracks%" %source% -o %dest%

SAMPLE RATE
===========

Normal CD audio from EAC is 44.1 kHz.

CW-Opus automatically resamples 44.1 kHz input to 48 kHz before encoding. No
EAC sample-rate conversion is required.

TAGGING
=======

CW-Opus writes OpusTags directly. Leave EAC's separate "Add ID3 tag" option
disabled.

PROJECT
=======

Product: CW-Opus
Version: 1.6.1.0
Company: Cole Williams Software Limited
