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Platform: Win32, OSX, LinuxCurrent version: 2.4.12
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BASS is an audio library for use in software on several platforms. Its purpose is to provide developers with powerful and efficient sample, stream (MP3, MP2, MP1, OGG, WAV, AIFF, custom generated, and more via OS codecs and add-ons), MOD music (XM, IT, S3M, MOD, MTM, UMX), MO3 music (MP3/OGG compressed MODs), and recording functions. All in a compact DLL that won't bloat your distribution.

C/C++, Delphi, and Visual Basic APIs are provided, with several examples to get you started. .Net and other APIs are also available.

BASS is also available for the Android, iOS, Windows Store/Phone, WinCE, and ARM Linux platforms.
Main features
Licensing
BASS is free for non-commercial use. If you are a non-commercial entity (eg. an individual) and you are not making any money from your product (through sales, advertising, etc), then you can use BASS in it for free. Otherwise, one of the following licences will be required.
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Shareware licence: €125
The "shareware" licence allows the usage of BASS in an unlimited number of your shareware ("try before you buy") products, which must sell for no more than €40 each. Non-shareware products are also permitted, but the product price limit is €10 in that case. The price limit can be raised by purchasing duplicate licences (for the same platform), eg. 2 licences doubles it. If you are an individual (not a corporation) making and selling your own software, this is the licence for you.
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iOS or Android platform special: €475

The "single commercial" licence allows the usage of BASS in one commercial product.
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The "unlimited commercial" licence allows the usage of BASS in an unlimited number of your commercial products. This licence applies to a single site/location at which products are being developed with BASS.
note that all prices are quoted in Euros, but payment can also be made in several other currencies
These licences are on a per-platform basis. There is a 40% reduction on each additional platform (excluding the iOS/Android Single Commercial specials), eg. Win32 and OSX Shareware licences would cost €200 (125+75) instead of €250.
In all cases there are no royalties to pay and you can use future BASS updates without further cost. Reselling/sublicensing is not permitted. Your products must be end-user products, eg. not components used by other products. Please note that these licences only cover your own software, not the publishing of other's software. If you have got any questions, please get in touch.
Add-ons
spacer BASSWMA 2.4.5.1
An extension enabling the playback of WMA files and streams, and also WMA encoding and broadcasting. Requires the Windows Media Format modules, which come installed with Windows Media Player or can be installed separately (wmfdist.exe). C/C++, Delphi, and Visual Basic APIs are included.
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BASSCD 2.4.6
An extension enabling digital streaming and ripping of audio CDs. Also includes analog playback support. C/C++, Delphi, and Visual Basic APIs are included.
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BASSFLAC 2.4.2.3
An extension enabling the playback of FLAC (inc. Ogg FLAC) encoded files and streams. C/C++, Delphi, and Visual Basic APIs are included.
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BASSMIDI 2.4.9
An extension enabling the playback of MIDI files and custom event sequences, using SF2 and SFZ soundfonts to provide the sounds, including support for packed soundfonts. MIDI input is also supported. C/C++, Delphi, and Visual Basic APIs are included. A couple of SF2 soundfonts are available here and here.
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BASSWV 2.4.5.1
An extension enabling the playback of WavPack encoded files and streams. C/C++, Delphi, and Visual Basic APIs are included.
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BASSOPUS 2.4.1.8
An extension enabling the playback of Opus encoded files and streams. C/C++, Delphi, and Visual Basic APIs are included.
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BASSDSD 2.4.0.1
An extension enabling the playback of DSD (Direct Stream Digital) data in DSDIFF and DSF containers. Includes raw DSD and DSD-over-PCM output options. C/C++, Delphi, and Visual Basic APIs are included.
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BASSALAC 2.4
An extension enabling the playback of ALAC (Apple Lossless Audio Codec) encoded files. C/C++, Delphi, and Visual Basic APIs are included. The ALAC format is supported as standard by BASS via the OS's codecs on OSX and iOS (also Windows 10).
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BASSenc 2.4.13
An extension that allows BASS channels to be encoded using command-line encoders with STDIN support (LAME/OGGENC/etc), or ACM codecs (on Windows) or CoreAudio codecs (on OSX/iOS), or user-provided encoders. Also features streaming of encoded data to clients directly or via Shoutcast and Icecast servers, and PCM WAV/AIFF file writing. C/C++, Delphi, and Visual Basic APIs are included.
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BASSenc_OGG 2.4
An extension to BASSenc that provides Ogg Vorbis encoding of BASS channels, with support for OGGENC options. C/C++, Delphi, and Visual Basic APIs are included.
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BASSenc_OPUS 2.4
An extension to BASSenc that provides Opus encoding of BASS channels, with support for OPUSENC options. C/C++, Delphi, and Visual Basic APIs are included.
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BASSmix 2.4.8
An extension providing the ability to mix together multiple BASS channels, with resampling and matrix mixing features. Also provides the ability to split a BASS channel into multiple channels. C/C++, Delphi, and Visual Basic APIs are included.
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An extension enabling the use of WASAPI input and output on Windows Vista and above, with support for exclusive and shared modes.
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An extension enabling the playback of HLS (HTTP Live Streaming) streams.
More add-ons
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BASS FX 2.4.11.1
An extension providing several effects, including reverse playback and tempo & pitch control. C/C++, Delphi, and Visual Basic APIs are included.
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BASS_SPX 2.4.3.2
An extension enabling the playback of Speex encoded files. C/C++, Delphi, and Visual Basic APIs are included.
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BASS_MPC 2.4.1.2
An extension enabling the playback of Musepack encoded files and streams. C/C++, Delphi, and Visual Basic APIs are included.
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BASS_APE 2.4.2
An extension enabling the playback of Monkey's Audio encoded files. C/C++, Delphi, and Visual Basic APIs are included.
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BASS_AAC 2.4.5.1
An extension based on the FAAD2 decoder, enabling the playback of AAC/MP4 encoded files and streams, including AAC+ Shoutcast streams. C/C++, Delphi, and Visual Basic APIs are included. The AAC/MP4 format is supported as standard by BASS via the OS's codecs on OSX and iOS (also Windows 7 and updated Vista).
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BASS_AC3 2.4.0.5
An extension enabling the playback of AC3 encoded files and streams. C/C++, Delphi, and Visual Basic APIs are included.
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BASS_TTA 2.4.0.2
An extension enabling the playback of TTA encoded files. C/C++, Delphi, and Visual Basic APIs are included.
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An extension enabling the playback of OptimFROG encoded files. C/C++, Delphi, and Visual Basic APIs are included.
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An extension enabling the playback of several chiptune/tracker module formats.
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An extension enabling the playback of ADX encoded files. C/C++ and Delphi APIs are included.
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An extension enabling the playback of AIX encoded files. C/C++ and Delphi APIs are included.
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An extension enabling the use of Winamp DSP plugins with BASS. C/C++, Delphi, and Visual Basic APIs are included.
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BASS_VST 2.4.5
An extension enabling the use of VST effect plugins with BASS.
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An extension enabling the use of Winamp input plugins with BASS. C/C++, Delphi, and Visual Basic APIs are included.
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An extension allowing the use of Sonique, Winamp, Windows Media Player, and BassBox visual plugins with BASS.
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An extension allowing Winamp visual plugins to be used with BASS. C/C++, Delphi, and Visual Basic APIs are included.
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Tags 18
An extension producing formatted text from the ID3v1/v2, OGG/FLAC, WMA, APE, MP4, and RIFF tags of a BASS stream. C/C++, Delphi, and Visual Basic APIs are included.
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An extension enabling the playback of video files with BASS, using DirectShow codecs.
note: These add-ons were created by third-parties. See the "readme" files for details.
Other APIs
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.Net API for BASS and all of the add-ons. Can be used with both C# and VB, with several examples included. Includes support for .Net Framework version 2.0 and 4.0 and Compact Framework 3.5 and Mono/Xamarin. The documentation can be viewed online: here.
spacer Delphi dynamic loading API
Delphi units for the dynamic loading of BASS and the add-ons.
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Pure Basic API for BASS and the BASSenc/BASSmix add-ons.
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Microsoft Macro Assembler API for BASS.
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Flat Assembler API for BASS 2.3.
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Java API for BASS, with examples.
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Python modules for BASS and the add-ons.
note: These APIs are provided by third-parties, so may not always be up-to-date with the latest BASS version & features.
Other stuff
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An online copy of the BASS and add-ons documentation.
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BASSASIO makes it simple to use ASIO hardware/drivers, and can be used with or without BASS.
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6 channel (5.1) OGG and WMA files, to test multi-channel stream playback.
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A plugin for XMMS, using BASS for MOD file playback. Source code included.
spacer The BASS showcase
A list of stuff that uses BASS.
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