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In-depth Feature:  Celemony Melodyne Studio 1.5
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Melody Detection
Melody Detection

Main arrange page + mixer
Melodyne's Arrange page resembles the main page of any audio sequencer with the tracks, as many as your processor can handle, ranged down the left hand side. A rudimentary yet functional mixer page to mix the tracks down is available as a pop up. Using Melodyne on the Mac you have the choice of using the Mac Soundmanager or an ASIO card as the audio I/O. Single melodies can either be recorded directly into the program or imported (.AIFF, .SDII, .WAV and .SND files are all supported) which is probably how the majority of users will use the program, porting over audio files from their main sequencer for detailed editing. Initially the audio file appears as a continuous waveform but this is merely the raw material for Melodyne to analyse. Although mono or stereo files are supported, only monophonic audio (ie single notes only) is suitable for the Melodyne processing and this should be recorded with as little background noise and as dry as possible, as reverb can imply polyphony and put a spanner in the works of the detection process - simply put, the clearer and cleaner the notes are, the better the results will be.

Melody detection
The 'detect melody' function is where Melodyne does its analysis and by clicking on it you have several options that can be employed to help Melodyne in the melody detection. You can, for example specify whether the audio is in fact vocals, percussion, speech or others and even specify the vocal type (tenor, soprano etc ) and note range, the known tempo can also be specified. These options may help with the detection process but even if none are specified Melodyne will still accurately detect the start and end points and pitches of the notes and work out an overall tempo for the audio file. Note vibrato, pitch transition between notes and amplitude (volume) are also detected. The detection process takes a little time as the audio is analysed and when it is finished you can open the Editor window (pic C) to see the fully detected melody laid out with its constituent parts displayed as individual portions of audio data, the pitch and positions of the actual notes in the melody referenced against a piano keyboard vertically and a timing grid horizontally. Standard musical notation can also be displayed for the detected notes. Detection is surprisingly accurate on most counts but if there are any slight aberrations they can be easily remedied with the available tools.

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