Audio Properties

Previous pageReturn to chapter overviewNext page



This section discusses the Media Details dialog settings for the Sound Object.

 

 

The Media Details dialog has an Assets tab which allows the sound to be treated as a shared asset and the Audio tab.

 

    Panels-Action-PlaySound-Properties

Audio tab options include:

 

Source (shown above as "mySound.mp3")

Path and Filename for the source sound.

 

OpenFile-icon Load Sound

This button opens a dialog to select a sound.

 

Reload-icon Reload Sound

Reloads the current content from an external file.

 

Imported Sound Properties

States the format, channels, frequency, duration and frames of the sound file imported.

 

 

SoundPlay-icon SoundPause-icon Play / Pause (Toggle) Sound

Plays the imported sound.

 

StopSound Stop Sound

Stops the sound playing.

 

Export Settings for playSound / Export Settings for Soundtrack

Export setting which apply to the sound if it is used as either a playSound() event or Soundtrack. See a description of Soundtracks and Event sounds at 'Import Sound...'. The Soundtrack setting applies to all soundtracks and can also be set at 'File | Export Settings | Soundtrack'.

 

· Compression: Available sound compression options (see details on ADPCM and MP3 below):
·None
·ADPCM:
·MP3: Preferred.

 

·Channels: Set the channels the sound uses:
·Lowest (only available for Soundtrack): Chooses the lowest setting among all soundtracks within the Movie.
·1 = Mono:
·2 = Stereo:
·Highest (only available for Soundtrack): Chooses the highest setting among all soundtracks within the Movie.

 

·Sample rate: Set the output sample rate:
·Lowest (only available for Soundtrack): Chooses the lowest setting among all soundtracks within the Movie.
·5.5125 kHz:
·11.025 kHz:
·22.050 kHz:
·44.100 kHz: (see comment below)
·Highest (only available for Soundtrack): Chooses the highest setting among all soundtracks within the Movie.

 

·Bitrate (available for MP3 only):  Available bitrates depend on the MP3 Codec installed.

 

·Samples Size (available for ADPCM only): Choose the sample size from 2 to 5 bits/sample.

 

 

Note on Compression types ADPCM vs. MP3:

ADPCM (Adaptive Differential Pulse Code Modulation) is a family of audio compression and decompression algorithms. It is a simple but efficient compression scheme that avoids any licensing or patent issues that arise with more sophisticated sound compression schemes, and helps to keep player implementations small. For SWF files of version 4 or later, MP3 Compression is a preferable format. MP3 produces substantially better sound for a given bitrate. ADPCM uses a modified Differential Pulse Code Modulation (DPCM) sampling technique where the encoding of a each sample is derived by calculating a 'difference' (DPCM) value, and applying to this a complex formula which includes the previous quantization value. The result is a compressed code, which can recreate almost the same subjective audio quality.

 

MP3 is a sophisticated and complex audio compression algorithm supported in SWF 4 and later. It produces superior audio quality at better compression ratios than ADPCM. Generally speaking, MP3 refers to MPEG1 Layer 3; however, SWF supports later versions of MPEG (V2 and 2.5) that were designed to support lower bitrates. Flash Player supports both CBR (constant bitrate) and VBR (variable bitrate) MP3 encoding. Source.

 

.

Note on 44.1kHz encoding

SWiSH Max use the Windows built-in ACM driver to encode MP3. However this codec only supports audio less than 44.1kHz. For encoding at 44.1kHz a different MP3 encoder is required. If a suitable codec is not found on your PC, SWiSH Max will prompt with a link to SWiSHzone.com offering a recommendation for a suitable codec.

 

 

AudioCodecDownload