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File Dialogs

New File [17 kB PNG]

New File [17 kB PNG]

The new file dialog provides shortcuts for common audio formats and allows you to remember the format used.

When selecting a format and initial duration of the file to allocate, the dialog indicates the size of the resulting data.

PCM files [23 kB PNG]

PCM files [23 kB PNG]

File format support via libsndfile by Erik de Castro Lopo:

  • at least 14 PCM sound file formats formats including WAV, W64, AIFF/AIFF-C, IFF/SVX, AU and raw PCM files.
  • PCM audio encoding formats including 8/16/24/32 bit PCM, 32 and 64 bit floating point, u-law, A-l aw and ADPCM
  • voice encoding formats including GSM 6.10, G721/G723 ADPCM, 12/16/24 bit DWVW
  • multichannel file support: Sweep provides complete editing and processing for multichannel sound files.

Ogg Vorbis [24 kB PNG]

Ogg Vorbis [24 kB PNG]

Sweep can import and export audio files in Ogg Vorbis format. This is an extremely high quality perceptual audio codec and is free, open and unpatented. Independent tests have found it to be of higher quality than non-free codecs including MP3, WMA and MP3pro -- hence, Ogg Vorbis is Sweep's preferred codec for final export.

This dialog shows the default Variable Bitrate encoding mode, in which a simple "quality" slider from 0 to 10 allows the Vorbis encoder to vary bitrate depending on the characteristics of the file being encoded.

Sweep can remember your encoding options for you, or allow you to use sensible defaults at any time.

Ogg Vorbis Average Bitrate mode [23 kB PNG]

Ogg Vorbis Average Bitrate mode [23 kB PNG]

This dialog shows the Average Bitrate mode for Ogg Vorbis encoding. This uses the bitrate management engine provided by Xiph.org's libvorbis, allowing the user to specify a nominal average bitrate.

Optionally, you can also specify minimum and maximum bitrates to provide guarantees for fixed-size channels or for general streaming applications.

Speex [27 kB PNG]

Speex [27 kB PNG]

As of version 0.5.9, Sweep can import and export speech files encoded in Speex format. This is a special purpose speech codec, designed for efficient Voice over IP (VoIP) and file-based compression. It is free, open and unpatented.

This dialog shows the encoding options available, including a simple "quality" slider from 0 to 10, the option of using Variable Bitrate (VBR) mode, and fine tuning of the computational complexity of the encoding and the Speex frame packing.

Encoding results [8 kB PNG]

Encoding results [8 kB PNG]

After encoding, Sweep provides a brief summary including the size of the file and the resulting bitrate.

Error reporting [6 kB PNG]

Error reporting [6 kB PNG]

If any problems were encountered, such as running out of disk space, Sweep provides notification of the problem and a summary of the partial results.

(This screenshot was produced by an attempt to write to the special file /dev/full, which simulates a full filesystem).

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Copyright © 1995-2002 Conrad Parker <conrad@metadecks.org> . . . Last modified Thu Mar 11 2004