Perbandingan Pengujian Kualitas Audio

PRATIKUM AUDIO DIGITAL

PENGUJIAN KUALITAS AUDIO

1.    Tujuan

1. Mahasiswa dapat mengganti nilai Sample dan Bit Depth sebuah file audio
2. Mahasiswa dapat menjelaskan perbandingan kualitas audio berdasarkan nilai Bit Depth, Sample Rate

2.    Teori singkat

a.      Audio merupakan frekuensi yang dapat di denmgar oleh telinga manusia 20hz-20khz.

b.      Kualitas audio ditentukan oleh banyak sample rate dan bit depth yang di ambil pada sebuah audio.

c.       Bit Depth adalah hal yang menetukan level suara atau nilai resolusi suara   atau jumlah tingkatan level suara. Audio 8 bit maka 2⁸ =256 level suara.

Semakin tinggi nilai bit depth maka  kualitas suara semakin baik, sebaliknya semakin        rendah nilai bit depth maka kualitas suara menjadi kurang baik.

d.      Sample Rate adalah menunjukan jumlah sinyal yang di ambil dalam 2 detik ketika b melalukan rekaman suara. Makin tinggi atau makin sering diambil per satuan waktunya maka suaranya akan mendekati suara asli karena kualitas suara yang baik itu adalah kualitas suara yang mirip dg suara aslinya.

e.    Alat dan Bahan

a.      Komputer PC

b.      Software Adobe Audition

c.       File musik  dalam format wav 

f.     Langkah Kerja

a.      Buka Adobe Audition

b.      Import File Audio dengan cara pada window File klik ikon Import File – Pilih file yang diinginkan – klik ganda file tersebut atau klik tombol Open.

c.       Sekarang file yang akan diedit sudah berada pada window File.

d.      Klik ganda ikon file yang akan di edit atau drag and drop ke window editor (Main)

e.      Untuk melihat informasi tentang file ini letakkan pointer pada window editor, klik kanan dan pilih File Info.

f.        Untuk mengganti Bit Depth  dan Sample Rate ,

·         Buka sesion baru: File – New

·         Pada Jendala New Waveform Pilih Sample Rate dan Bit Rate sesuai dengan yang dibutuhkan (tabel 1)

·         Dan selesai

g.    Hasil Pengujian

Tabel 1. Perbandingan Ukuran dan Kualitas audio pada sample rate tetap 44100 hz dengan Bit Depth bervariasi  

Sample Rate (Hz)	Bit Dept	Ukuran File (KB)	Kualitas suara
44 100	32	94.81 MB	Setara kualitas cd audio
44 100	16	47.40 MB	Setara kualitas cd audio
44 100	8	23.70 MB	Setara kualitas cd audio

1. Membandingkan berdasarkan Sample Rate

Bit Dept	Sample Rate (Hz)	Ukuran File (KB)	Kualitas Suara
8	11.025	5,92 MB	Setara dg kualitas radio am
8	22.050	11,8 MB	Setara dengan radio fm
8	32.000	17,2 MB	Lebih baik dari fm
8	44.100	23,7 MB	Setara kualitas cd audio
8	48.000	25,8 MB	Setara kualitas standar dvd
8	96.000	51,6 MB	Setara high end dvd

Bit Dept	Sample Rate (Hz)	Ukuran File (KB)	Kualitas Suara
16	11.025	11,8 MB	Setara dg kualitas radio am
16	22.050	23,7 MB	Setara dengan radio fm
16	32.000	34,4 MB	Lebih baik dari fm
16	44.100	47,4 MB	Setara kualitas cd audio
16	48.000	51,6 MB	Setara kualitas standar dvd
16	96.000	103 MB	Setara high end dvd

Bit Dept	Sample Rate (Hz)	Ukuran File (KB)	Kualitas Suara
32	11.025	23,7 MB	Setara dg kualitas radio am
32	22.050	47,4 MB	Setara dengan radio fm
32	32.000	68,8 MB	Lebih baik dari fm
32	44.100	94,8 MB	Setara kualitas cd audio
32	48.000	103 MB	Setara kualitas standar dvd
32	96.000	206 MB	Setara high end dvd

h.   Pembahasan

Adobe audition digunakan untuk mengedit atau mengubah suara atau lagu yang kita iginkan baik dari bithnya atau pun ukurannya . Semakin tinggi ukuran bith maka baik kualitas suara dan sebaliknya semakin rendah ukuran bithnya maka semakin buruk kualitas suatu suara atau lagu

i.      Kesimpulan

Jadi semkin baik kualitas suatu suara ditentukan oleh bith nya dan ukurannya hz dan juga pemutar suaranya apakah streo atau mono, tapi lebih baik stereo di bandingkan mono sebab stero mempunyai suara yang lebih jelas dan bagus.

Tentang Saya

Adjie Aminullah Kayef lahir di Jakarta,menyelesaikan pendidikan SD  di Jakarta tahun 2004 (SDN 07 MAJA PG). Kemudian melanjutkan ke SMPN 1 LUBUKSIKAPING dan selesai tahun 2007. Dan melanjutkan ke SMAN 1 LUBUKSIKAPING dan selesai tahun 2010.

Pada tahun 2010 mendapatkan kesempatan untuk melanjutkan study di Politeknik Universitas Andalas melalui  jalur seleksi nilai UN(Ujian Nasional) pada jurusan Teknologi Informasi dan Prodi Manajemen Informatika.

 

About Adobe Audition

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This article relies on references to primary sources or sources affiliated with the subject, rather than references from independent authors and third-party publications. Please add citations from reliable sources. (July 2011)

Adobe Audition

Adobe Audition CS5.5, running on Windows XP.
Developer(s)	Adobe Systems
Initial release	18 August 2003
Stable release	CS5.5 (4.0) / 11 April 2011; 6 months ago (2011-04-11)
Preview release	Unknown
Operating system	Windows XP SP3 and newer, Windows Vista, Mac OS X Leopard 10.5.8 and newer.
Type	Digital audio workstation
License	Proprietary
Website	Adobe Audition Homepage

Adobe Audition (formerly Cool Edit Pro) is a digital audio workstation from Adobe Systems featuring both a multitrack, non-destructive mix/edit environment and a destructive-approach waveform editing view.

Contents  [hide]  1 Origins 2 Versions 2.1 Version 1 2.2 Version 2 2.3 Version 3 2.4 Version 4 3 See also 4 References 5 External links

[edit] Origins

Syntrillium Software was founded in the early 1990s by Robert Ellison and David Johnston, both former Microsoft employees. Originally developed by Syntrillium as Cool Edit, the program was distributed as crippleware. The full version was useful and flexible, particularly for its time. Syntrillium later released Cool Edit Pro, which added the capability to work with multiple tracks, as well as other features. Audio processing, however, was done in a destructive manner (at the time, most computers were not powerful enough in terms of processor performance and memory capacity to perform non-destructive operations in real time). Cool Edit Pro v2 added support for real-time non-destructive processing, and v2.1 added support for surround sound mixing and unlimited simultaneous tracks (up to the limit imposed by the actual computer hardware). Cool Edit also included plugins such as noise reduction and FFT equalization.
Adobe purchased the latest, non-shareware version (Cool Edit Pro v2.1) from Syntrillium Software in May 2003 for $16.5 million^[1] as well as a large loop library called "Loopology". Adobe then changed the name of Cool Edit Pro to "Adobe Audition".

[edit] Versions

[edit] Version 1

Adobe Audition was released on 18 August 2003. It had no new features, and was essentially Cool Edit Pro under a different name. Adobe then released Audition v1.5 in May 2004; major improvements over v1 included pitch correction, frequency space editing, a CD project view, basic video editing and integration with Adobe Premiere, as well as several other enhancements.

[edit] Version 2

Adobe Audition 2 was released on 17 January 2006. With this release, Audition (which the music recording industry had once seen as a value-oriented home studio application, although it has long been used for editing by radio stations) entered the professional Digital Audio Workstation market. The current version included two sections. Multitrack View supported up to 128 digital audio mono or stereo tracks at up to 32-bit resolution. In the Track Controls section one could select the input and output for each track (the program supported multiple multi-channel sound cards), select Record, Solo and Mute, and access the effects rack. New features included ASIO (Audio stream input output) support, VST (Virtual Studio Technology) support, new mastering tools (many provided by iZotope), and a redesigned UI. Adobe also included Audition 2.0 as part of its Adobe Production Studio bundle.

[edit] Version 3

Adobe Audition 3 was released on 8 November 2007. New features included VSTi (virtual instrument) support, enhanced spectral editing, a redesigned multi-track interface, new effects, and a collection of royalty-free loops.

[edit] Version 4

Audition 4, also known as Audition CS5.5, was released on April 11 2011 as part of Adobe's Creative Suite of programs. Audition 4 was shipped as part of the Adobe Creative Suite 5.5 Master Collection and Adobe Creative Suite 5.5 Production Premium, replacing the discontinued Adobe Soundbooth. Audition 4 was also made available as a standalone product. Enhanced integration with Adobe Premiere Pro allowed editing of multitrack Premiere projects, and users of third-party software were served by the introduction of OMF and XML based import/export functions. Other new features included improved 5.1 multichannel support, new effects (DeHummer, DeEsser, Speech Volume Leveler, and Surround Reverb), a History panel, faster and fully supported realtime FFT analysis and a new audio engine (more reliable and fastest) for non-ASIO device.
According to Adobe^[2], Audition CS5.5 was rewritten from ground-up to take advantage of parallel/batch processing for performance and make it a platform-agnostic product. Audition CS5.5 now works on Windows and Mac platforms. Over 15 years of C++ code was analyzed, and many, but not all features of the previous Audition 3 were ported and/or enhanced. Among the missing features are tone/noise generation; Midi Editing & Vsti Support; Metronome and Loop Editing; pitch correction; original FFT filters, scientific filters; graphic phase shifter; revert to original file, MIDI-based hardware control, playback, and virtual instrument sequencing; and legacy session support. Unlike all the previous versions, this is the first version to be available as the Mac version as well as the Windows version.