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  2. NBC chimes - Wikipedia

    en.wikipedia.org/wiki/NBC_chimes

    Originally developed in 1927 as seven notes, they were standardized to the current three-note version by the early 1930s, and possibly as early as 1929. The chimes were originally employed as an audible programming cue, used to alert network control engineers and the announcers at NBC's radio network affiliates.

  3. MPEG-1 Audio Layer II - Wikipedia

    en.wikipedia.org/wiki/MPEG-1_Audio_Layer_II

    MPEG-1 Audio Layer II or MPEG-2 Audio Layer II (MP2, sometimes incorrectly called Musicam or MUSICAM) [7] is a lossy audio compression format defined by ISO/IEC 11172-3 alongside MPEG-1 Audio Layer I and MPEG-1 Audio Layer III (MP3). While MP3 is much more popular for PC and Internet applications, MP2 remains a dominant standard for audio ...

  4. Comparison of free software for audio - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_free...

    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 ...

  5. Haibane Renmei - Wikipedia

    en.wikipedia.org/wiki/Haibane_Renmei

    Haibane Renmei (灰羽連盟, lit. "Grey Feather Federation") [a] is a 2002 Japanese anime television series based on an unfinished dōjinshi manga series by Yoshitoshi Abe, The Haibanes of Old Home (オールドホームの灰羽達, Ōrudo-hōmu no Haibane-tachi).

  6. List of open-source codecs - Wikipedia

    en.wikipedia.org/wiki/List_of_open-source_codecs

    FAAD2 – open-source decoder for Advanced Audio Coding. There is also FAAC, the same project's encoder, but it is proprietary (but still free of charge). libgsm – Lossy compression ; opencore-amr – Lossy compression (AMR and AMR-WB) liba52 – a free ATSC A/52 stream decoder (AC-3) libdca – a free DTS Coherent Acoustics decoder

  7. Audio-lingual method - Wikipedia

    en.wikipedia.org/wiki/Audio-lingual_method

    Practice is how the learning of the language takes place. Every language skill is the total of the sets of habits that the learner is expected to acquire. Practice is central to all the contemporary foreign language teaching methods. With audio-lingual method, it is emphasized even more. Oral learning is emphasized.

  8. Harvard sentences - Wikipedia

    en.wikipedia.org/wiki/Harvard_sentences

    IEEE Recommended Practice for Speech Quality Measurements [3] sets out seventy-two lists of ten phrases each, described as the "1965 Revised List of Phonetically Balanced Sentences (Harvard Sentences)." They are widely used in research on telecommunications, speech, and acoustics, where standardized and repeatable sequences of speech are needed.

  9. Digital audio - Wikipedia

    en.wikipedia.org/wiki/Digital_audio

    Machines for these formats had their own transports built-in as well, using reel-to-reel tape in either 1/4", 1/2", or 1" widths, with the audio data being recorded to the tape using a multi-track stationary tape head. PCM adaptors allowed for stereo digital audio recording on a conventional NTSC or PAL video tape recorder.