Music/Audio Files Required for listening tests

Easy and very profitable project for any reasonable expert in music or audio. Person is required to put together 20 audio files of length 20s and also to artificially degrade the quality of them to produce a second set of degraded audio files. I have developed a software program to assess the quality of audio signals. You put in the original audio file and you put in the "degraded" (less quality/bit rate) audio file and the program runs to give you a score of 1-5 indicating the quality of the distorted/degraded audio file. To test the program I need to put together 20 perfect quality audio signals of 20s in length and another 20 files which are the same audio samples except they have been distorted. I will a sample of the audio files that are needed. See below..

## Deliverables

1) 20 audio files of 20s in length each with very good quality. 2) 20 of the same exact audio files except they must be degraded in quality. If someone was to grade the quality of these against the others they would give a score, on a scale of 1 to 5, of 2 for the 1st 5 files, 3 for the 2nd 5 files, 4 for the 3rd 5 files and the final 5 files would be very very distorted. 3)The audio files should contain no singing but they should sound nice to the listener ie music (the second 20 files are the same as the first 20 files except they have been distorted). 4) The audio pairs (20 pairs) will be given to human subjects to grade the quality of the distorted signals so they should be music like. 5)They must be sampled at 48kHz 16-bit PCM 6) Each pair of audio files should be both time and level adapted to each other ie in synchronisation 7) They are to be listened at at a level of 92dB SPL. Ive attached some sample audio files but I would like most of the music files to be more music like than these. All files should be .wav format.

## Platform

48Khz 16-bit PCM Level and Time aligned. WAV files (Microsoft RIFF format). 20 pairs of files: 20 files with perfect quality and 20 files that have been distorted i.e. gone through an audio codec. Note: The 20 degraded audio files are the same exact as the original files except they have been distorted.

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