SD2 to RA: Convert Audio from SD2(Sound Designer 2) to RA(RealAudio) with River Past Audio Converter, SD22RA converter, conversion

What is SD2?

SDII (Sound Designer II, sometimes seen abbreviated as SD2) is a monophonic/stereophonic audio file format, originally developed by Digidesign for their Macintosh-based recording/editing products. It is the successor to the original monophonic Sound Designer I audio file format.

An SDII file can be monophonic or stereophonic. When stereo is used, the tracks are interleaved (sample-001-left, sample-001-right, sample-002-left, sample-002-right, etc.) Files also store sample rate and bit depth information.

The SDII file has become a widely accepted standard for transferring audio files between editing applications. Most Mac CD-ROM writer software, for example, specifies SDII or Audio Interchange File Format as the file format needed when making audio CDs.

The SDII file has also become accepted among personal computer audio application developers. This makes transferring audio from Mac to PC platforms much easier. When used on a PC, the file must use the extension of ".sd2".

To convert SD2 files to other audio formats, please make sure Apple QuickTime is installed.

What is RA?

RealAudio was developed by RealNetworks and supports FM-stereo-quality sound. To hear a Web page that includes a RealAudio sound file, you need a RealAudio player or plug-in, a program that is freely available from a number of places.

More information is available on RealNetwork web site.

To convert other audio formats to RealAudio, you will need River Past RealMedia Booster Pack in addition to your audio software.

Additional Requirements

To convert from SD2(Sound Designer 2) to RA(RealAudio) audio with River Past Audio Converter, you must have River Past RealMedia Booster Pack installed.

Launch River Past Audio Converter

Once River Past Audio Converter is installed properly, launch Audio Converter.

Add File

Click on the "Add" button on the tool bar. The standard file open dialog appears. Select "SD2 - Sound Designer 2" in its "Files of type" combo box.

Select the file you want to convert and click "Open". The file will be added to the conversion file list.

Note: To convert from SD2 files, you must have Apple QuickTime installed.

River Past Audio Converter

Select output format

Use the setting panel on the bottom of the window to control the output format. Click on the toggle to the left of the "Format" label to expand the panel. Select "RA - RealAudio" as the "Audio Type".

Note: To convert to RealAudio, you must have River Past RealMedia Booster Pack installed.

You can change the audience, mode, complexity, sample rate, channel (stereo or mono) and bits/sample.

The audience specify the target audience of your video. Normally, it is based on the bitrate of quality. For example, to enable users of 256k DSL connection to play the video from internet, set the audience to "256k DSL or Cable". The choices for "Mode" are "Music" or "Voice".