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In 1973, with the imprimatur of Popular Science magazine, Project 3 released a test record to set up and calibrate 4-channel quadraphonic sound. [3] A year later, the label released a quadraphonic test record produced for Fisher Electronics. [4] The liner notes described the unique test disk: This is a most unusual recording.
Real Audio Gecko (from Real Producer 9.0.1) 64 kbit/s; Windows Media Audio v9 VBR quality 50; QuickTime 6.3 AAC LC 64 kbit/s, Best Quality; Various 12 30-43 Nero HE-AAC: This test showed that listeners preferred 128 kbit/s MP3 audio encoded by LAME to all the tested codecs at 64 kbit/s, with greater than 99% confidence:
MUSHRA stands for Multiple Stimuli with Hidden Reference and Anchor and is a methodology for conducting a codec listening test to evaluate the perceived quality of the output from lossy audio compression algorithms. It is defined by ITU-R recommendation BS.1534-3. [1] The MUSHRA methodology is recommended for assessing "intermediate audio quality".
Perceptual Evaluation of Audio Quality (PEAQ) is a standardized algorithm for objectively measuring perceived audio quality, developed in 1994–1998 by a joint venture of experts within Task Group 6Q of the International Telecommunication Union's Radiocommunication Sector . It was originally released as ITU-R Recommendation BS.1387 in 1998 and ...
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For Windows 8, the name was changed to Windows Hardware Certification Kit (Windows HCK), as announced at the //Build/ conference. Subsequently, its name was once again changed into Windows Hardware Lab Kit (Windows HLK) for Windows 10 release, intended for testing of hardware and drivers on Windows 10 platform.
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multi-track audio recorder and editor GPL-2.0-or-later: Audacity: Dominic Mazzoni Yes Yes Yes Yes wxWidgets multi-track audio recorder and editor GPL-2.0-or-later, CC BY 3.0 (documentation) Ecasound: Yes Yes Yes Yes limited support through Cygwin: command line audio recorder GPL-2.0-or-later: Gnome Wave Cleaner: Jeff Welty Yes No No GTK+ audio ...