3 Converted the library codebase to C++11. A lot of hacks and custom
4 structures have been replaced with standard or cleaner implementations.
6 Partially implemented the Vocal Morpher effect.
8 Fixed the bsinc SSE resamplers on non-GCC compilers.
12 Fixed support for extended capture formats with OpenSL.
14 Fixed handling of WASAPI not reporting a default device.
16 Fixed performance problems relating to semaphores on macOS.
18 Modified the bsinc12 resampler's transition band to better avoid aliasing
21 Modified alcResetDeviceSOFT to attempt recovery of disconnected devices.
23 Modified the virtual speaker layout for HRTF B-Format decoding.
25 Modified the PulseAudio backend to use a custom processing loop.
27 Renamed the makehrtf utility to makemhr.
29 Improved the efficiency of the bsinc resamplers when up-sampling.
31 Improved the quality of the bsinc resamplers slightly.
33 Improved the efficiency of the HRTF mixers.
35 Improved the HRTF B-Format decoder coefficient generation.
37 Improved reverb fading to be more consistent with pan fading.
39 Improved handling of sources that end prematurely, to avoid loud clicks.
41 Improved the performance of some reverb processing loops.
43 Added fast_bsinc resamplers that improve efficiency at the cost of some
44 quality. Notably, when down-sampling with pitch ramping.
46 Added support for SOFA input files with makemhr.
48 Added a build option to use pre-built native tools. For cross-compiling,
49 use with caution and ensure the native tools' binaries are kept up-to-date.
51 Added an adjust-latency config option for the PulseAudio backend.
53 Added basic support for multi-field HRTFs.
55 Added an option for mixing first-, second-, or third-order B-Format with
56 HRTF output. This can improve HRTF performance given a number of sources.
58 Added an RC file for proper DLL version information.
60 Disabled some old KDE workarounds by default. Specifically, PulseAudio
61 streams can now be moved (KDE may try to move them after opening).
65 Implemented capture support for the SoundIO backend.
67 Fixed source buffer queues potentially not playing properly when a queue
70 Fixed possible unexpected failures when generating auxiliary effect slots.
72 Fixed a crash with certain reverb or device settings.
76 Improved output limiter response, better ensuring the sample amplitude is
81 Implemented the ALC_SOFT_device_clock extension.
83 Implemented the Pitch Shifter, Frequency Shifter, and Autowah effects.
85 Fixed compiling on FreeBSD systems that use freebsd-lib 9.1.
87 Fixed compiling on NetBSD.
89 Fixed the reverb effect's density scale and panning parameters.
91 Fixed use of the WASAPI backend with certain games, which caused odd COM
92 initialization errors.
94 Increased the number of virtual channels for decoding Ambisonics to HRTF
97 Changed 32-bit x86 builds to use SSE2 math by default for performance.
98 Build-time options are available to use just SSE1 or x87 instead.
100 Replaced the 4-point Sinc resampler with a more efficient cubic resampler.
102 Renamed the MMDevAPI backend to WASAPI.
104 Added support for 24-bit, dual-ear HRTF data sets. The built-in data set
105 has been updated to 24-bit.
107 Added a 24- to 48-point band-limited Sinc resampler.
109 Added an SDL2 playback backend. Disabled by default to avoid a dependency
112 Improved the performance and quality of the Chorus and Flanger effects.
114 Improved the efficiency of the band-limited Sinc resampler.
116 Improved the Sinc resampler's transition band to avoid over-attenuating
119 Improved the performance of some filter operations.
121 Improved the efficiency of object ID lookups.
123 Improved the efficienty of internal voice/source synchronization.
125 Improved AL call error logging with contextualized messages.
127 Removed the reverb effect's modulation stage. Due to the lack of reference
128 for its intended behavior and strength.
132 Fixed resetting the FPU rounding mode after certain function calls on
135 Fixed use of SSE intrinsics when building with Clang on Windows.
137 Fixed a crash with the JACK backend when using JACK1.
139 Fixed use of pthread_setnane_np on NetBSD.
141 Fixed building on FreeBSD with an older freebsd-lib.
143 OSS now links with libossaudio if found at build time (for NetBSD).
147 Fixed an issue where resuming a source might not restart playing it.
149 Fixed PulseAudio playback when the configured stream length is much less
150 than the requested length.
152 Fixed MMDevAPI capture with sample rates not matching the backing device.
154 Fixed int32 output for the Wave Writer.
156 Fixed enumeration of OSS devices that are missing device files.
158 Added correct retrieval of the executable's path on FreeBSD.
160 Added a config option to specify the dithering depth.
162 Added a 5.1 decoder preset that excludes front-center output.
166 Implemented the AL_EXT_STEREO_ANGLES and AL_EXT_SOURCE_RADIUS extensions.
168 Implemented the AL_SOFT_gain_clamp_ex, AL_SOFT_source_resampler,
169 AL_SOFT_source_spatialize, and ALC_SOFT_output_limiter extensions.
171 Implemented 3D processing for some effects. Currently implemented for
172 Reverb, Compressor, Equalizer, and Ring Modulator.
174 Implemented 2-channel UHJ output encoding. This needs to be enabled with a
175 config option to be used.
177 Implemented dual-band processing for high-quality ambisonic decoding.
179 Implemented distance-compensation for surround sound output.
181 Implemented near-field emulation and compensation with ambisonic rendering.
182 Currently only applies when using the high-quality ambisonic decoder or
183 ambisonic output, with appropriate config options.
185 Implemented an output limiter to reduce the amount of distortion from
188 Implemented dithering for 8-bit and 16-bit output.
190 Implemented a config option to select a preferred HRTF.
192 Implemented a run-time check for NEON extensions using /proc/cpuinfo.
194 Implemented experimental capture support for the OpenSL backend.
196 Fixed building on compilers with NEON support but don't default to having
199 Fixed support for JACK on Windows.
201 Fixed starting a source while alcSuspendContext is in effect.
203 Fixed detection of headsets as headphones, with MMDevAPI.
205 Added support for AmbDec config files, for custom ambisonic decoder
206 configurations. Version 3 files only.
208 Added backend-specific options to alsoft-config.
210 Added first-, second-, and third-order ambisonic output formats. Currently
211 only works with backends that don't rely on channel labels, like JACK,
214 Added a build option to embed the default HRTFs into the lib.
216 Added AmbDec presets to enable high-quality ambisonic decoding.
218 Added an AmbDec preset for 3D7.1 speaker setups.
220 Added documentation regarding Ambisonics, 3D7.1, AmbDec config files, and
221 the provided ambdec presets.
223 Added the ability for MMDevAPI to open devices given a Device ID or GUID
226 Added an option to the example apps to open a specific device.
228 Increased the maximum auxiliary send limit to 16 (up from 4). Requires
229 requesting them with the ALC_MAX_AUXILIARY_SENDS context creation
232 Increased the default auxiliary effect slot count to 64 (up from 4).
234 Reduced the default period count to 3 (down from 4).
236 Slightly improved automatic naming for enumerated HRTFs.
238 Improved B-Format decoding with HRTF output.
240 Improved internal property handling for better batching behavior.
242 Improved performance of certain filter uses.
244 Removed support for the AL_SOFT_buffer_samples and AL_SOFT_buffer_sub_data
245 extensions. Due to conflicts with AL_EXT_SOURCE_RADIUS.
249 Implemented device enumeration for OSSv4.
251 Fixed building on OSX.
253 Fixed building on non-Windows systems without POSIX-2008.
255 Fixed Dedicated Dialog and Dedicated LFE effect output.
257 Added a build option to override the share install dir.
259 Added a build option to static-link libgcc for MinGW.
263 Fixed building with JACK and without PulseAudio.
265 Fixed building on FreeBSD.
267 Fixed the ALSA backend's allow-resampler option.
269 Fixed handling of inexact ALSA period counts.
271 Altered device naming scheme on Windows backends to better match other
274 Updated the CoreAudio backend to use the AudioComponent API. This clears up
275 deprecation warnings for OSX 10.11, although requires OSX 10.6 or newer.
279 Implemented a JACK playback backend.
281 Implemented the AL_EXT_BFORMAT and AL_EXT_MULAW_BFORMAT extensions.
283 Implemented the ALC_SOFT_HRTF extension.
285 Implemented C, SSE3, and SSE4.1 based 4- and 8-point Sinc resamplers.
287 Implemented a C and SSE based band-limited Sinc resampler. This does 12- to
288 24-point Sinc resampling, and performs anti-aliasing.
290 Implemented B-Format output support for the wave file writer. This creates
291 FuMa-style first-order Ambisonics wave files (AMB format).
293 Implemented a stereo-mode config option for treating stereo modes as either
294 speakers or headphones.
296 Implemented per-device configuration options.
298 Fixed handling of PulseAudio and MMDevAPI devices that have identical
301 Fixed a potential lockup when stopping playback of suspended PulseAudio devices.
303 Fixed logging of Unicode characters on Windows.
305 Fixed 5.1 surround sound channels. By default it will now use the side
306 channels for the surround output. A configuration using rear channels is
309 Fixed the QSA backend potentially altering the capture format.
311 Fixed detecting MMDevAPI's default device.
313 Fixed returning the default capture device name.
315 Fixed mixing property calculations when deferring context updates.
317 Altered the behavior of alcSuspendContext and alcProcessContext to better
318 match certain Windows drivers.
320 Altered the panning algorithm, utilizing Ambisonics for better side and
321 back positioning cues with surround sound output.
323 Improved support for certain older Windows apps.
325 Improved the alffplay example to support surround sound streams.
327 Improved support for building as a sub-project.
329 Added an HRTF playback example.
331 Added a tone generator output test.
333 Added a toolchain to help with cross-compiling to Android.
337 Implemented EFX Chorus, Flanger, Distortion, Equalizer, and Compressor
340 Implemented high-pass and band-pass EFX filters.
342 Implemented the high-pass filter for the EAXReverb effect.
344 Implemented SSE2 and SSE4.1 linear resamplers.
346 Implemented Neon-enhanced non-HRTF mixers.
348 Implemented a QSA backend, for QNX.
350 Implemented the ALC_SOFT_pause_device, AL_SOFT_deferred_updates,
351 AL_SOFT_block_alignment, AL_SOFT_MSADPCM, and AL_SOFT_source_length
354 Fixed resetting mmdevapi backend devices.
356 Fixed clamping when converting 32-bit float samples to integer.
358 Fixed modulation range in the Modulator effect.
360 Several fixes for the OpenSL playback backend.
362 Fixed device specifier names that have Unicode characters on Windows.
364 Added support for filenames and paths with Unicode (UTF-8) characters on
367 Added support for alsoft.conf config files found in XDG Base Directory
368 Specification locations (XDG_CONFIG_DIRS and XDG_CONFIG_HOME, or their
369 defaults) on non-Windows systems.
371 Added a GUI configuration utility (requires Qt 4.8).
373 Added support for environment variable expansion in config options (not
374 keys or section names).
376 Added an example that uses SDL2 and ffmpeg.
378 Modified examples to use SDL_sound.
380 Modified CMake config option names for better sorting.
382 HRTF data sets specified in the hrtf_tables config option may now be
383 relative or absolute filenames.
385 Made the default HRTF data set an external file, and added a data set for
386 48khz playback in addition to 44.1khz.
388 Added support for C11 atomic methods.
390 Improved support for some non-GNU build systems.
394 Fixed a regression with retrieving the source's AL_GAIN property.
398 Fixed device enumeration with the OSS backend.
400 Reorganized internal mixing logic, so unneeded steps can potentially be
401 skipped for better performance.
403 Removed the lookup table for calculating the mixing pans. The panning is
404 now calculated directly for better precision.
406 Improved the panning of stereo source channels when using stereo output.
408 Improved source filter quality on send paths.
410 Added a config option to allow PulseAudio to move streams between devices.
412 The PulseAudio backend will now attempt to spawn a server by default.
414 Added a workaround for a DirectSound bug relating to float32 output.
416 Added SSE-based mixers, for HRTF and non-HRTF mixing.
418 Added support for the new AL_SOFT_source_latency extension.
420 Improved ALSA capture by avoiding an extra buffer when using sizes
421 supported by the underlying device.
423 Improved the makehrtf utility to support new options and input formats.
425 Modified the CFLAGS declared in the pkg-config file so the "AL/" portion of
426 the header includes can optionally be omitted.
428 Added a couple example code programs to show how to apply reverb, and
431 The configuration sample is now installed into the share/openal/ directory
432 instead of /etc/openal.
434 The configuration sample now gets installed by default.