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AC3 Filter 2.2a

AC3Filter is high quality freeware DirectShow audio decoder and processor filter used to decode audio tracks in movies (DVD, MPEG4 and others). It has a priority on wide functionality and convenient settings.

AC3 Filter can decode following audio formats: AC3 / DTS / MPEG Audio. It also supports multi-channel and digital (SPDIF) outputs.

Features of AC3 Filter 2.2:

• Playback:
- Watch movies with AC3 and DTS audio tracks
- Listen multi-channel (AC3/DTS) AudioCD
- Playback WAV files with AC3/DTS content, ripped from multi-channel AudioCD without any conversion of these files.
- Playback raw .AC3 and DTS files (with help of AC3File filter)
• Process:
- Up-mix any audio track (even plain stereo) up to 6 channels
- Down-mix any audio track to any number of channels (to match your speaker configuration)
- If you have an external Dolby ProLogic decoder, you may use ProLogic down-mix to help DPL decoder to extract surround information
- Watch movies under poor hearing conditions (noisy environment, weak speakers, ...)
- Decrease dynamic range to watch movies at night
- Apply time shift to the audio track to synchronize audio with video.
- Adjust gain of every input/output channel independently to compensate loudness differences
- Adjust time delays for every channel to compensate different distances to loudspeakers.
• SPDIF:
- Passthrough AC3 and DTS over SPDIF without any change to external decoder
- Encode any audio to AC3 and transmit it over SPDIF
- USB sound cards supported

Tags:

- Audio Codec Tag 2000 may be requested when AC3 Filter is missing.
- Audio Codec Tag 8192 may be requested when AC3 Filter is missing.
- It also solves AC3 DVM codec missing, reported by AVIcodec utility.

Changes in AC3 Filter 2.2a:

• Bugfix release:
- OGG Vorbis support.
- ACM driver works again (was broken in v2.0a).
- Several bugs leading to crash fixed.
• AC3 Filter 2.1a:
- Equalizer crash fixed. Thanks to all who report bugs.
- HDMV LPCM support (it was noise).
• AC3 Filter 2.0a:
- 8 channels support
- PCM Double output support
- DTS-MA (core only), AAC, EAC3, FLAC, MP3 decoding support
- Completely new bass redirection:
* better filtering (4th order Linkwitz-Riley)
* option to redirect bass to front speakers
- Single icon per application
- Online help
- Crash report
- Set filter language from the installer
- Translations:
* Portuguese, thanks to Manuela Silva
* Turkish, thanks to AltanEdip
* Dutch, thanks to Ernst Klamer
* Bulgarian, thanks to Георги Бързев
* Ukrainian, thanks to Michael Vigovsky

Changes in AC3 Filter 1.63b:

- AC3 decoding bug fixed (Issue 1)
- Channel order bug fixed (issue 43)
- Remote control using messages
- Write version number to the registry on install (issue 17)
- Command line interface for AC3Config utility (run ac3config /? for help)
- Swedish translation added (thanks to Niclas Burgren)
- French language updated (thanks to Philippe AGUESSE)

Changes in AC3 Filter 1.46:

- AC3 encoder bitrate is now adjustable
- Korean translation added (thanks to starcodec)
- Upmixing of Dolby Surround files works now (thanks to Stefan Schott)
- MPEG Audio Joint stereo playback fixed (thanks to Daniel Bechter)
- Problem with decimal point in mixing matrix on some non-english Windows (thanks to Marcin Hencz)

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